Pub Date : 2024-10-22DOI: 10.1016/j.matchar.2024.114482
Clémence Fontaine , Lola Lilensten , Dalibor Preisler , Josef Strasky , Mathilde Laurent-Brocq , Philippe Chevallier , Amélie Fillon , Daniel Galy , Milos Janecek , Frédéric Prima
Compositional boundaries of activity regarding transformation-induced plasticity and mechanical twinning (TRIP/TWIP) in Ti-Nb alloying system is determined by a novel methodology using chemically graded samples prepared by Spark Plasma Sintering. Presented methods of characterization include nanoindentation and microindentation testing complemented by EBSD analyses. The link between composition, microstructure, deformation mechanisms and mechanical properties can be established. Applied to the Ti-Nb system for a proof of concept, both the identification of local mechanical properties with respect to composition, and the refinement of the compositional ranges within which the different deformation mechanisms occur can be obtained. The graded sample ranging from 14 at.% to 34 at.% Nb is studied. TRIP/TWIP activity is resolved by EBSD in range 17 to 24 at.% of Nb, which is significantly lower than the results from the literature. This difference is attributed to the presence of interstitial oxygen (2470 ± 60 weight ppm).
{"title":"Local characterization of mechanical properties and deformation mechanisms of SPS graded strain-transformable Ti-Nb alloy","authors":"Clémence Fontaine , Lola Lilensten , Dalibor Preisler , Josef Strasky , Mathilde Laurent-Brocq , Philippe Chevallier , Amélie Fillon , Daniel Galy , Milos Janecek , Frédéric Prima","doi":"10.1016/j.matchar.2024.114482","DOIUrl":"10.1016/j.matchar.2024.114482","url":null,"abstract":"<div><div>Compositional boundaries of activity regarding transformation-induced plasticity and mechanical twinning (TRIP/TWIP) in Ti-Nb alloying system is determined by a novel methodology using chemically graded samples prepared by Spark Plasma Sintering. Presented methods of characterization include nanoindentation and microindentation testing complemented by EBSD analyses. The link between composition, microstructure, deformation mechanisms and mechanical properties can be established. Applied to the Ti-Nb system for a proof of concept, both the identification of local mechanical properties with respect to composition, and the refinement of the compositional ranges within which the different deformation mechanisms occur can be obtained. The graded sample ranging from 14 at.% to 34 at.% Nb is studied. TRIP/TWIP activity is resolved by EBSD in range 17 to 24 at.% of Nb, which is significantly lower than the results from the literature. This difference is attributed to the presence of interstitial oxygen (2470 ± 60 weight ppm).</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"218 ","pages":"Article 114482"},"PeriodicalIF":4.8,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-21DOI: 10.1016/j.matchar.2024.114480
Gaopeng Xu , Ting Wu , Ruili Liu , Yunqian Zhen , Funian Han , Kui Wang , Hongbin Xie , Hao Wang , Haiyan Jiang , Wenjiang Ding
In this work, a significant enhancement of corrosion resistance of Fe-B materials in liquid Al (750 °C), with a corrosion rate one order of magnitude lower than that of H13 die steel, has been achieved by constructing nano-lamellar structures in the matrix. Results indicate that the nano-lamellar structure can not only effectively obstruct the interdiffusion between the Al and Fe atoms, restricting the growth of corrosion layers, but also accommodate sufficient growth and thermal stresses, suppressing the spallation of corrosion products. Furthermore, the ceramic nanoparticles in-situ formed in the nano-lamellar structure can inhibit the inward diffusion of Al atoms, greatly enhancing the corrosion resistance of α-Fe matrix. Besides, they also provide a robust pinning effect on the corrosion interface, improving the adhesion strength of corrosion products with the matrix. The architecture of nano-lamellar structure with nanoparticles may provide a novel strategy against liquid Al corrosion and shed new light on the development of corrosion-resistant materials.
{"title":"Architecture of a remelted layer with the nano-lamellar structure at the surface of FeB materials via laser remelting to resist liquid aluminum corrosion","authors":"Gaopeng Xu , Ting Wu , Ruili Liu , Yunqian Zhen , Funian Han , Kui Wang , Hongbin Xie , Hao Wang , Haiyan Jiang , Wenjiang Ding","doi":"10.1016/j.matchar.2024.114480","DOIUrl":"10.1016/j.matchar.2024.114480","url":null,"abstract":"<div><div>In this work, a significant enhancement of corrosion resistance of Fe-B materials in liquid Al (750 °C), with a corrosion rate one order of magnitude lower than that of H13 die steel, has been achieved by constructing nano-lamellar structures in the matrix. Results indicate that the nano-lamellar structure can not only effectively obstruct the interdiffusion between the Al and Fe atoms, restricting the growth of corrosion layers, but also accommodate sufficient growth and thermal stresses, suppressing the spallation of corrosion products. Furthermore, the ceramic nanoparticles in-situ formed in the nano-lamellar structure can inhibit the inward diffusion of Al atoms, greatly enhancing the corrosion resistance of α-Fe matrix. Besides, they also provide a robust pinning effect on the corrosion interface, improving the adhesion strength of corrosion products with the matrix. The architecture of nano-lamellar structure with nanoparticles may provide a novel strategy against liquid Al corrosion and shed new light on the development of corrosion-resistant materials.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"218 ","pages":"Article 114480"},"PeriodicalIF":4.8,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A novel thermomechanical processing route was developed to prepare Al-Zn-Mg-Cu alloys containing heterostructures with coupled soft/hard micro-scale areas. The heterostructure gives an effect on the subsequent precipitation behavior of alloys. Importantly, the tensile strengths, elongation and corrosion resistance of grain boundaries of the #3 alloy with an appropriate coupled distribution of soft/hard micro-scale areas are all greatly improved compared with the alloy with the homogeneous structure. Based on the detailed microstructure characterization, the corresponding strengthening and corrosion resistance mechanisms of alloys with heterostructure have been established in this paper.
{"title":"Precipitation behavior of Al-Zn-Mg-Cu alloys with the coupled soft/hard micro-scale areas and its effect on properties","authors":"Jinming Zhi , Mingxing Guo , Wen Meng , Wei Zhou , Linzhong Zhuang , Huafen Lou","doi":"10.1016/j.matchar.2024.114476","DOIUrl":"10.1016/j.matchar.2024.114476","url":null,"abstract":"<div><div>A novel thermomechanical processing route was developed to prepare Al-Zn-Mg-Cu alloys containing heterostructures with coupled soft/hard micro-scale areas. The heterostructure gives an effect on the subsequent precipitation behavior of alloys. Importantly, the tensile strengths, elongation and corrosion resistance of grain boundaries of the #3 alloy with an appropriate coupled distribution of soft/hard micro-scale areas are all greatly improved compared with the alloy with the homogeneous structure. Based on the detailed microstructure characterization, the corresponding strengthening and corrosion resistance mechanisms of alloys with heterostructure have been established in this paper.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"218 ","pages":"Article 114476"},"PeriodicalIF":4.8,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-20DOI: 10.1016/j.matchar.2024.114478
T. Ickler , D. Jüngst , H. Meckbach , F. Zeismann , A. Brückner-Foit , M. Fehlbier
Various brittle phases are present in commercial cast aluminum alloys, which strongly influence their mechanical behavior. Among these, silicon precipitates are nearly omnipresent, as Si is a common alloying element. In secondary alloys, usually Fe-containing phases cannot be avoided, and they tend to degrade the mechanical properties. The interaction between the silicon phase and the failure-critical intermetallic phase in the Al-Si-Fe phase system (β-) is studied in this paper in high resolution. A model alloy AlSi10Fe0.7 was defined, which is composed of a large grain Al-matrix, Si-precipitates and the plate-like β- phase. The goal of the study was to identify “hot spots” in the microstructure from which cracks may initiate under mechanical loading. The main tool was a deformation analysis via digital image correlation in the SEM (SEM-DIC). This allows the identification and tracking of developing strain localizations at different potential crack initiation sites with a high resolution as well as capturing an overview over the whole specimen. An adapted frame averaging script minimized measurement errors induced by drift. The SEM-DIC results show that the deformation field is governed by the elastic incompatibility of the microstructural constituents. Crack initiation occurs because of the detachment of the Si + β- phase boundary. Cracks then cross the phase boundary and propagate along twin boundaries in the β- phase. Final failure is caused by linking fractured brittle plate-like particles.
{"title":"SEM-DIC characterization of the damage mechanism of an AlSi10Fe0.7 casting alloy on the microstructure scale","authors":"T. Ickler , D. Jüngst , H. Meckbach , F. Zeismann , A. Brückner-Foit , M. Fehlbier","doi":"10.1016/j.matchar.2024.114478","DOIUrl":"10.1016/j.matchar.2024.114478","url":null,"abstract":"<div><div>Various brittle phases are present in commercial cast aluminum alloys, which strongly influence their mechanical behavior. Among these, silicon precipitates are nearly omnipresent, as Si is a common alloying element. In secondary alloys, usually Fe-containing phases cannot be avoided, and they tend to degrade the mechanical properties. The interaction between the silicon phase and the failure-critical intermetallic phase in the Al-Si-Fe phase system (β-<span><math><msub><mi>Al</mi><mn>5</mn></msub><mtext>FeSi</mtext></math></span>) is studied in this paper in high resolution. A model alloy AlSi10Fe0.7 was defined, which is composed of a large grain Al-matrix, Si-precipitates and the plate-like β-<span><math><msub><mi>Al</mi><mn>5</mn></msub><mtext>FeSi</mtext></math></span> phase. The goal of the study was to identify “hot spots” in the microstructure from which cracks may initiate under mechanical loading. The main tool was a deformation analysis via digital image correlation in the SEM (SEM-DIC). This allows the identification and tracking of developing strain localizations at different potential crack initiation sites with a high resolution as well as capturing an overview over the whole specimen. An adapted frame averaging script minimized measurement errors induced by drift. The SEM-DIC results show that the deformation field is governed by the elastic incompatibility of the microstructural constituents. Crack initiation occurs because of the detachment of the Si + β-<span><math><msub><mi>Al</mi><mn>5</mn></msub><mtext>FeSi</mtext></math></span> phase boundary. Cracks then cross the phase boundary and propagate along twin boundaries in the β-<span><math><msub><mi>Al</mi><mn>5</mn></msub><mtext>FeSi</mtext></math></span> phase. Final failure is caused by linking fractured brittle plate-like particles.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"218 ","pages":"Article 114478"},"PeriodicalIF":4.8,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-20DOI: 10.1016/j.matchar.2024.114477
Jiaming Cao , Yimeng Li , Jianan Liu , Ke Zhan , Bin Zhao , Vincent Ji
The controllable microstructure and the overall performance improvement of electrodeposited nano twinned Cu (nt-Cu) foil are crucial for the sustainable development of high energy density batteries and microelectronics technology. Although pulse electrodeposition (PED) and additives have been widely used in controlling nt-Cu foil, there is still a lack of research on the controllable microstructure of nt-Cu foil and its microstructure depended properties. In this study, nt-Cu foils with different orientations were prepared by adjusting the Toff time and additives during the PED process. The effects of these parameters on the microstructure and comprehensive properties of the nt-Cu foil were studied. The Toff time and polyethylene glycol (PEG)-3-mercapto-1-propanesulfonate sodium salt (MPS)-(chloride ions)Cl− (PEG-MPS-Cl−) additive changed the kinetic parameters of the electrochemical reaction and ultimately affected the reduction rate of Cu2+ and the overpotential of the deposition process. This modulation effectively regulated the nucleation and growth behavior of Cu atoms, thereby reducing the surface roughness of the nt-Cu foil, refining the grains, and forming nano-twins with different orientations. Due to the combined strengthening effect of grain refinement, dislocation, and texture orientation, (111) oriented nt-Cu foil demonstrated remarkable mechanical and frictional wear properties, whereas (220) oriented nt-Cu foil exhibited superior conductivity and corrosion resistance. These findings may offer promising prospects for the controllable design of engineering textures and nano-twin structures of high-performance nt-Cu foil by electrodeposition.
{"title":"Engineering texture and twins of Cu foils preparing by pulse electrodeposition and their properties","authors":"Jiaming Cao , Yimeng Li , Jianan Liu , Ke Zhan , Bin Zhao , Vincent Ji","doi":"10.1016/j.matchar.2024.114477","DOIUrl":"10.1016/j.matchar.2024.114477","url":null,"abstract":"<div><div>The controllable microstructure and the overall performance improvement of electrodeposited nano twinned Cu (nt-Cu) foil are crucial for the sustainable development of high energy density batteries and microelectronics technology. Although pulse electrodeposition (PED) and additives have been widely used in controlling nt-Cu foil, there is still a lack of research on the controllable microstructure of nt-Cu foil and its microstructure depended properties. In this study, nt-Cu foils with different orientations were prepared by adjusting the T<sub>off</sub> time and additives during the PED process. The effects of these parameters on the microstructure and comprehensive properties of the nt-Cu foil were studied. The T<sub>off</sub> time and polyethylene glycol (PEG)-3-mercapto-1-propanesulfonate sodium salt (MPS)-(chloride ions)Cl<sup>−</sup> (PEG-MPS-Cl<sup>−</sup>) additive changed the kinetic parameters of the electrochemical reaction and ultimately affected the reduction rate of Cu<sup>2+</sup> and the overpotential of the deposition process. This modulation effectively regulated the nucleation and growth behavior of Cu atoms, thereby reducing the surface roughness of the nt-Cu foil, refining the grains, and forming nano-twins with different orientations. Due to the combined strengthening effect of grain refinement, dislocation, and texture orientation, (111) oriented nt-Cu foil demonstrated remarkable mechanical and frictional wear properties, whereas (220) oriented nt-Cu foil exhibited superior conductivity and corrosion resistance. These findings may offer promising prospects for the controllable design of engineering textures and nano-twin structures of high-performance nt-Cu foil by electrodeposition.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"218 ","pages":"Article 114477"},"PeriodicalIF":4.8,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-19DOI: 10.1016/j.matchar.2024.114475
K.V. Werner , R. Gholizadeh , G.L. Wu , G. Winther , N. Tsuji , O.V. Mishin
The microstructure and mechanical properties have been investigated in a CoCrFeNi alloy cold-rolled to 80 % thickness reduction and subsequently annealed at 600 °C. It is observed that the as-rolled microstructure comprises extended regions of different dominant crystallographic orientations along with layers of mixed orientations. Shear bands are also present in this microstructure, with the susceptibility to shear banding varying significantly from region to region. Shear bands are most pronounced in extended regions containing narrow deformation twins, and are a crucial source of recrystallization nuclei. Analysis of the recrystallization kinetics indicates that the Avrami exponent is ∼1.6 for the first 30 min at 600 °C and that it decreases during further annealing. Tensile test data provide evidence that the sample annealed for 8 min, with a recrystallized fraction (fRX) of 13 % and an average recrystallized grain size of 0.8 μm, does not show any significant improvement in ductility compared to that in the as-rolled condition. However, the ductility is considerably improved in the sample annealed for 15 min, where fRX is 43 % and the average recrystallized grain size is 1.1 μm. This sample demonstrates a yield strength of 850 MPa and a total elongation to failure of 25 %. The data obtained in this work and in previous publications on partially recrystallized CoCrFeNi indicate that for samples annealed after 80–85 % deformation optimized combinations of strength and ductility are obtained when the recrystallized fraction is in the range 30 % < fRX ≤ 50 %.
{"title":"Recrystallization kinetics and mechanical properties of cold-rolled and annealed CoCrFeNi multi-principal element alloy","authors":"K.V. Werner , R. Gholizadeh , G.L. Wu , G. Winther , N. Tsuji , O.V. Mishin","doi":"10.1016/j.matchar.2024.114475","DOIUrl":"10.1016/j.matchar.2024.114475","url":null,"abstract":"<div><div>The microstructure and mechanical properties have been investigated in a CoCrFeNi alloy cold-rolled to 80 % thickness reduction and subsequently annealed at 600 °C. It is observed that the as-rolled microstructure comprises extended regions of different dominant crystallographic orientations along with layers of mixed orientations. Shear bands are also present in this microstructure, with the susceptibility to shear banding varying significantly from region to region. Shear bands are most pronounced in extended regions containing narrow deformation twins, and are a crucial source of recrystallization nuclei. Analysis of the recrystallization kinetics indicates that the Avrami exponent is ∼1.6 for the first 30 min at 600 °C and that it decreases during further annealing. Tensile test data provide evidence that the sample annealed for 8 min, with a recrystallized fraction (<em>f</em><sub>RX</sub>) of 13 % and an average recrystallized grain size of 0.8 μm, does not show any significant improvement in ductility compared to that in the as-rolled condition. However, the ductility is considerably improved in the sample annealed for 15 min, where <em>f</em><sub>RX</sub> is 43 % and the average recrystallized grain size is 1.1 μm. This sample demonstrates a yield strength of 850 MPa and a total elongation to failure of 25 %. The data obtained in this work and in previous publications on partially recrystallized CoCrFeNi indicate that for samples annealed after 80–85 % deformation optimized combinations of strength and ductility are obtained when the recrystallized fraction is in the range 30 % < <em>f</em><sub>RX</sub> ≤ 50 %.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"218 ","pages":"Article 114475"},"PeriodicalIF":4.8,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-19DOI: 10.1016/j.matchar.2024.114474
Yekun Yuan , Jianhong Yi , Liang Liu , Rui Bao , Caiju Li , Yichun Liu , Fengxian Li , Xin Kong , Xiaofeng Chen
To address the poor wettability and weak interface bonding between boron nitride nanosheet (BNNS) and Cu, BNNS/CuTi composites were prepared through matrix microalloying by adding 1 wt% Ti. Solid-state interfacial reactions resulted in the formation of TiN transition layers and TiB whiskers (TiBw), collectively constructed a BNNS-(TiN&TiB)-Cu interfacial three-dimensional structure (I-3DS). The coherent I-3DS significantly reduced the interfacial energy, improved the interfacial stability, and achieved a favorable combination of strength and ductility in BNNS/CuTi composites. The 0.1 wt% BNNS/CuTi composite achieved an ultimate tensile strength (UTS) of 485 MPa, representing increases of 114 % and 62 % over pure Cu and 0.1 wt% BNNS/Cu composite, respectively. The interlocking structure formed by I-3DS and Cu doubled the theoretical interface shear strength limit and improved load transfer efficiency. This study offered new insights into the innovative design of high-performance Cu matrix composites (CMCs) by constructing I-3DS.
{"title":"Enhanced strength and ductility of boron nitride nanosheet reinforced cu composites through constructing an interfacial three-dimensional structure","authors":"Yekun Yuan , Jianhong Yi , Liang Liu , Rui Bao , Caiju Li , Yichun Liu , Fengxian Li , Xin Kong , Xiaofeng Chen","doi":"10.1016/j.matchar.2024.114474","DOIUrl":"10.1016/j.matchar.2024.114474","url":null,"abstract":"<div><div>To address the poor wettability and weak interface bonding between boron nitride nanosheet (BNNS) and Cu, BNNS/CuTi composites were prepared through matrix microalloying by adding 1 wt% Ti. Solid-state interfacial reactions resulted in the formation of TiN transition layers and TiB whiskers (TiBw), collectively constructed a BNNS-(TiN&TiB)-Cu interfacial three-dimensional structure (I-3DS). The coherent I-3DS significantly reduced the interfacial energy, improved the interfacial stability, and achieved a favorable combination of strength and ductility in BNNS/CuTi composites. The 0.1 wt% BNNS/CuTi composite achieved an ultimate tensile strength (UTS) of 485 MPa, representing increases of 114 % and 62 % over pure Cu and 0.1 wt% BNNS/Cu composite, respectively. The interlocking structure formed by I-3DS and Cu doubled the theoretical interface shear strength limit and improved load transfer efficiency. This study offered new insights into the innovative design of high-performance Cu matrix composites (CMCs) by constructing I-3DS.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"218 ","pages":"Article 114474"},"PeriodicalIF":4.8,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The present work focuses on the effect of the addition of a zirconium source on the microstructure of Al-SiC composites produced by Laser Powder Bed Fusion (L-PBF). More specifically, the aim is to address the issue of the SiC decomposition into the water-soluble aluminum carbide Al4C3 in Al-SiC composites produced by L-PBF, with the objective of limiting its formation by adding another element to the system. To this end, AlSi7Mg0.6-SiC-ZrO2 composite powders are successfully prepared and printed in a standard L-PBF equipment. The resulting parts are then thoroughly characterized, in order to understand the physico-chemical mechanisms involved during the L-PBF process. The results show a decrease in the Al4C3 amount by ZrC formation. Another important result is that bulk composites exhibit a fully equiaxed microstructure attributed to the τ1 (Al,Si)3Zr ternary phase, with all the characteristics of a good nucleating agent for aluminum phase. To support these microstructure experimental results, a first version of a quaternary Al-Zr-Si-C thermodynamic database was developed using the Calphad method. These calculations enable to establish a solidification path providing information on the phases that may form after heat treatment of L-PBF materials.
{"title":"Effect of a Zr source addition on the microstructure of Al-SiC composites elaborated by the Laser Powder Bed Fusion (L-PBF) process","authors":"Marie-Reine Manlay , Camille Flament , Stéphane Gossé , Mathieu Soulier , Jean-Paul Garandet","doi":"10.1016/j.matchar.2024.114472","DOIUrl":"10.1016/j.matchar.2024.114472","url":null,"abstract":"<div><div>The present work focuses on the effect of the addition of a zirconium source on the microstructure of Al-SiC composites produced by Laser Powder Bed Fusion (L-PBF). More specifically, the aim is to address the issue of the SiC decomposition into the water-soluble aluminum carbide Al<sub>4</sub>C<sub>3</sub> in Al-SiC composites produced by L-PBF, with the objective of limiting its formation by adding another element to the system. To this end, AlSi<sub>7</sub>Mg<sub>0.6</sub>-SiC-ZrO<sub>2</sub> composite powders are successfully prepared and printed in a standard L-PBF equipment. The resulting parts are then thoroughly characterized, in order to understand the physico-chemical mechanisms involved during the L-PBF process. The results show a decrease in the Al<sub>4</sub>C<sub>3</sub> amount by ZrC formation. Another important result is that bulk composites exhibit a fully equiaxed microstructure attributed to the τ<sub>1</sub> (Al,Si)<sub>3</sub>Zr ternary phase, with all the characteristics of a good nucleating agent for aluminum phase. To support these microstructure experimental results, a first version of a quaternary Al-Zr-Si-C thermodynamic database was developed using the Calphad method. These calculations enable to establish a solidification path providing information on the phases that may form after heat treatment of L-PBF materials.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"218 ","pages":"Article 114472"},"PeriodicalIF":4.8,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-18DOI: 10.1016/j.matchar.2024.114469
Lixiong Shao , Xianfeng Li , Guoping Zhao , Gaoqiu Sun , Yaqi Deng , Dong Chen , Cunjuan Xia , Haowei Wang
The meticulous exploration of castability, especially the fluidity and hot tearing susceptibility (HTS), assumes paramount significance in the fabrication of high-quality Al-Li-Cu alloys. In this work, the effect of microalloying elements such as Ti, Mg, Si, Zr, and Sc on the fluidity and HTS of the alloys was systematically investigated, and the significant improvement in fluidity and the reduction in HTS by the addition of these microalloying elements were identified. Comparative analyses with the Al-3Li-1.5Cu alloy reveal a significant increase of up to 45 % in fluidity and a remarkable reduction of up to 83 % in HTS with the addition of these microalloying elements. To unveil the underlying mechanisms, the experimental results were compared with the predictions derived from the CSC criterion, Kou's criterion, and a numerical simulation performed using ProCAST software. The analysis reveals a discrepancy between these predictions and the experimental outcomes, highlighting their limitations in capturing the nuanced effects of minor microalloying elements on fluidity and HTS. Subsequently, a detailed exploration of other influencing factors, including microstructural features, solidification interval, and various thermophysical parameters, was conducted, illuminating the corresponding mechanisms. These findings are expected to provide valuable insights into the fluidity and HTS of Al-Li-Cu-X alloys, thereby contributing to the application and advancement of cast Al-Li alloys.
{"title":"Experimental investigation and simulation assessment on fluidity and hot tearing susceptibility of Al-Li-Cu-X alloy: The role of microalloying elements","authors":"Lixiong Shao , Xianfeng Li , Guoping Zhao , Gaoqiu Sun , Yaqi Deng , Dong Chen , Cunjuan Xia , Haowei Wang","doi":"10.1016/j.matchar.2024.114469","DOIUrl":"10.1016/j.matchar.2024.114469","url":null,"abstract":"<div><div>The meticulous exploration of castability, especially the fluidity and hot tearing susceptibility (HTS), assumes paramount significance in the fabrication of high-quality Al-Li-Cu alloys. In this work, the effect of microalloying elements such as Ti, Mg, Si, Zr, and Sc on the fluidity and HTS of the alloys was systematically investigated, and the significant improvement in fluidity and the reduction in HTS by the addition of these microalloying elements were identified. Comparative analyses with the Al-3Li-1.5Cu alloy reveal a significant increase of up to 45 % in fluidity and a remarkable reduction of up to 83 % in HTS with the addition of these microalloying elements. To unveil the underlying mechanisms, the experimental results were compared with the predictions derived from the CSC criterion, Kou's criterion, and a numerical simulation performed using ProCAST software. The analysis reveals a discrepancy between these predictions and the experimental outcomes, highlighting their limitations in capturing the nuanced effects of minor microalloying elements on fluidity and HTS. Subsequently, a detailed exploration of other influencing factors, including microstructural features, solidification interval, and various thermophysical parameters, was conducted, illuminating the corresponding mechanisms. These findings are expected to provide valuable insights into the fluidity and HTS of Al-Li-Cu-X alloys, thereby contributing to the application and advancement of cast Al-Li alloys.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"218 ","pages":"Article 114469"},"PeriodicalIF":4.8,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-18DOI: 10.1016/j.matchar.2024.114471
Ala Manohar , Thirukachhi Suvarna , S.V. Prabhakar Vattikuti , Hemanth P.K. Sudhani , Panchanathan Manivasagan , Eue-Soon Jang , Shoyebmohamad F. Shaikh , Ashok Kumar , Kuldeep Sharma , Naresh Mameda , Ki Hyeon Kim
This study dives into the successful synthesis of CeO2/CuFe2O4 nanocomposites using the auto-combustion approach and elucidates their characteristics. The electrochemical analysis of samples calcination produced at 700 °C (CeO2/CuFe2O4) revealed good results, with a specific capacitance (Cs) of 123 F/g at a current density (CD) of 0.25 A g−1 in a 1 M KOH solution. Significantly, these findings emphasize the established technique's potential for producing new, highly active, flexible, and environmentally friendly substrate materials appropriate for a variety of applications in supercapacitors. CeO2/CuFe2O4 nanocomposites may be useful in biological and medicinal research. Despite their extensive use, little study has been conducted to investigate their possible impact on cell viability, in normal cell lines. The positive benefits of the CeO2/CuFe2O4 nanocomposite structure were assessed using X-ray diffraction (XRD). To assess the impact of these nanocomposites, MTT cytotoxicity tests were performed on normal (mouse muscle fibroblast - BLO-11) cell lines. The results show that CeO2/CuFe2O4 nanocomposites have a high potential for biomedical applications, as they had no harmful effects on the cell types evaluated. As a result, the structure of the material appears to be crucial in determining both electrochemical performance and cell longevity. This discovery is significant because it provides useful insights into the morphological engineering of electrodes for a variety of applications and influences future material development.
本研究利用自燃方法成功合成了 CeO2/CuFe2O4 纳米复合材料，并阐明了其特性。在 700 °C 下煅烧产生的样品（CeO2/CuFe2O4）的电化学分析结果显示效果良好，在 1 M KOH 溶液中，电流密度（CD）为 0.25 A g-1 时，比电容（Cs）为 123 F/g。重要的是，这些发现强调了这一成熟技术在生产新型、高活性、柔性和环保基底材料方面的潜力，适合超级电容器的各种应用。CeO2/CuFe2O4 纳米复合材料可用于生物和医药研究。尽管 CeO2/CuFe2O4 纳米复合材料被广泛使用，但很少有人研究它们对正常细胞系的细胞活力可能产生的影响。我们使用 X 射线衍射 (XRD) 评估了 CeO2/CuFe2O4 纳米复合材料结构的积极意义。为了评估这些纳米复合材料的影响，对正常细胞系（小鼠肌肉成纤维细胞 - BLO-11）进行了 MTT 细胞毒性测试。结果表明，CeO2/CuFe2O4 纳米复合材料具有很高的生物医学应用潜力，因为它们对所评估的细胞类型没有有害影响。因此，材料的结构似乎是决定电化学性能和细胞寿命的关键。这一发现意义重大，因为它为各种应用的电极形态工程提供了有用的见解，并影响了未来的材料开发。
{"title":"Comprehensive study of CeO2/CuFe2O4 nanocomposites: Structural, EPR, magnetic, electrochemical, and cytotoxicity properties","authors":"Ala Manohar , Thirukachhi Suvarna , S.V. Prabhakar Vattikuti , Hemanth P.K. Sudhani , Panchanathan Manivasagan , Eue-Soon Jang , Shoyebmohamad F. Shaikh , Ashok Kumar , Kuldeep Sharma , Naresh Mameda , Ki Hyeon Kim","doi":"10.1016/j.matchar.2024.114471","DOIUrl":"10.1016/j.matchar.2024.114471","url":null,"abstract":"<div><div>This study dives into the successful synthesis of CeO<sub>2</sub>/CuFe<sub>2</sub>O<sub>4</sub> nanocomposites using the auto-combustion approach and elucidates their characteristics. The electrochemical analysis of samples calcination produced at 700 °C (CeO<sub>2</sub>/CuFe<sub>2</sub>O<sub>4</sub>) revealed good results, with a specific capacitance (Cs) of 123 F/g at a current density (CD) of 0.25 A g<sup>−1</sup> in a 1 M KOH solution. Significantly, these findings emphasize the established technique's potential for producing new, highly active, flexible, and environmentally friendly substrate materials appropriate for a variety of applications in supercapacitors. CeO<sub>2</sub>/CuFe<sub>2</sub>O<sub>4</sub> nanocomposites may be useful in biological and medicinal research. Despite their extensive use, little study has been conducted to investigate their possible impact on cell viability, in normal cell lines. The positive benefits of the CeO<sub>2</sub>/CuFe<sub>2</sub>O<sub>4</sub> nanocomposite structure were assessed using X-ray diffraction (XRD). To assess the impact of these nanocomposites, MTT cytotoxicity tests were performed on normal (mouse muscle fibroblast - BLO-11) cell lines. The results show that CeO<sub>2</sub>/CuFe<sub>2</sub>O<sub>4</sub> nanocomposites have a high potential for biomedical applications, as they had no harmful effects on the cell types evaluated. As a result, the structure of the material appears to be crucial in determining both electrochemical performance and cell longevity. This discovery is significant because it provides useful insights into the morphological engineering of electrodes for a variety of applications and influences future material development.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"218 ","pages":"Article 114471"},"PeriodicalIF":4.8,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号