In this paper, it is demonstrated that the calculated physical adsorption energies, substrate–adsorbent distances and substrate distortions strongly depend on the size of the employed supercell and particularly on the type of optimization in the case of very flexible two-dimensional monolayers, such as indium (II) selenide (InSe). It has been established that calculations with optimization of only atomic positions and calculations with optimization of atomic positions and lattice parameters can give energies of different signs and values. In-plane (stretching and compression) and out-of-plane (ripple formation) distortions also lead to significant changes in the calculated adsorption energies. The influence of substrate flexibility and adsorption on the electronic structure and optical properties is also discussed.
{"title":"First-principles modeling of molecular adsorption on an InSe monolayer","authors":"Xue Lei, Anatoly F Zatsepin","doi":"10.1680/jemmr.22.00216","DOIUrl":"https://doi.org/10.1680/jemmr.22.00216","url":null,"abstract":"In this paper, it is demonstrated that the calculated physical adsorption energies, substrate–adsorbent distances and substrate distortions strongly depend on the size of the employed supercell and particularly on the type of optimization in the case of very flexible two-dimensional monolayers, such as indium (II) selenide (InSe). It has been established that calculations with optimization of only atomic positions and calculations with optimization of atomic positions and lattice parameters can give energies of different signs and values. In-plane (stretching and compression) and out-of-plane (ripple formation) distortions also lead to significant changes in the calculated adsorption energies. The influence of substrate flexibility and adsorption on the electronic structure and optical properties is also discussed.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138528402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Haoran Wang, Rongsheng Xu, Lu Wei, Jian Lin, Dongping Wu
Autoclaved aerated concrete (AAC) is a lightweight porous material, which is widely used as wall material. However, the performance of AAC under sulfate attack is still unclear. Therefore, this experiment investigated the performance changes of AAC with different bulk densities in sodium sulfate solution. Meanwhile, the influence of B05 grade AAC under erosion by sodium sulfate, magnesium sulfate and ammonium sulfate solutions was studied separately, and the degradation degree of its performance in different concentrations of sodium sulfate solution was analyzed. Mass change, relative dynamic modulus of elasticity (Erd) and compressive strength, mineral phase and micromorphologies were investigated. The results revealed that Erd decreased more obviously with a higher bulk density class, but the variety of the compressive strength was inversed. Moreover, the performances of AAC samples degraded more significantly while they were exposed to sodium sulfate solution. With an increase in sulfate solution concentration, the performance of AAC deteriorated more seriously.
{"title":"Deterioration law and mechanism of autoclaved aerated concrete under sulfate attack","authors":"Haoran Wang, Rongsheng Xu, Lu Wei, Jian Lin, Dongping Wu","doi":"10.1680/jemmr.23.00047","DOIUrl":"https://doi.org/10.1680/jemmr.23.00047","url":null,"abstract":"Autoclaved aerated concrete (AAC) is a lightweight porous material, which is widely used as wall material. However, the performance of AAC under sulfate attack is still unclear. Therefore, this experiment investigated the performance changes of AAC with different bulk densities in sodium sulfate solution. Meanwhile, the influence of B05 grade AAC under erosion by sodium sulfate, magnesium sulfate and ammonium sulfate solutions was studied separately, and the degradation degree of its performance in different concentrations of sodium sulfate solution was analyzed. Mass change, relative dynamic modulus of elasticity (<i>E</i> <sub>rd</sub>) and compressive strength, mineral phase and micromorphologies were investigated. The results revealed that <i>E</i> <sub>rd</sub> decreased more obviously with a higher bulk density class, but the variety of the compressive strength was inversed. Moreover, the performances of AAC samples degraded more significantly while they were exposed to sodium sulfate solution. With an increase in sulfate solution concentration, the performance of AAC deteriorated more seriously.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138528411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, the properties of cobalt–chromium alloys are systematically prioritized to aid in the minimization of orthopedic implant failures and risks in biomedical applications. Within the model, six main groups (including a total of 31 properties) are defined: economic aspects, design and production properties, mechanical properties, physical properties, chemical properties and biological properties. A risk-based fuzzy decision making framework is proposed for prioritization. First, a risk-management decision matrix is created by employing interval type-2 fuzzy failure modes and effects analysis. Afterward, the properties of cobalt–chromium alloys are analyzed by utilizing interval type-2 fuzzy measurement of alternatives and ranking according to compromise solution. In the last phase, a prediction model is devised with an adaptive network fuzzy inference system to save computational time and effort and to enable the incorporation of new scientific results into the biomaterial evaluation process. The results of the current study demonstrate that compatibility, osseointegration, corrosion resistance, fatigue resistance and time-dependent deformation are the top five properties contributing to potential orthopedic implant failures and risks. Furthermore, the developed model produces very satisfactory results with acceptable deviations. Consequently, this study presents a new and reliable guide for the unbiased evaluation of cobalt–chromium alloys.
{"title":"A risk-based decision making framework to analyze the properties of cobalt–chromium alloys","authors":"Hilal Singer, Tijen Över Özçelik","doi":"10.1680/jemmr.22.00220","DOIUrl":"https://doi.org/10.1680/jemmr.22.00220","url":null,"abstract":"In this study, the properties of cobalt–chromium alloys are systematically prioritized to aid in the minimization of orthopedic implant failures and risks in biomedical applications. Within the model, six main groups (including a total of 31 properties) are defined: economic aspects, design and production properties, mechanical properties, physical properties, chemical properties and biological properties. A risk-based fuzzy decision making framework is proposed for prioritization. First, a risk-management decision matrix is created by employing interval type-2 fuzzy failure modes and effects analysis. Afterward, the properties of cobalt–chromium alloys are analyzed by utilizing interval type-2 fuzzy measurement of alternatives and ranking according to compromise solution. In the last phase, a prediction model is devised with an adaptive network fuzzy inference system to save computational time and effort and to enable the incorporation of new scientific results into the biomaterial evaluation process. The results of the current study demonstrate that compatibility, osseointegration, corrosion resistance, fatigue resistance and time-dependent deformation are the top five properties contributing to potential orthopedic implant failures and risks. Furthermore, the developed model produces very satisfactory results with acceptable deviations. Consequently, this study presents a new and reliable guide for the unbiased evaluation of cobalt–chromium alloys.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138528404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Manoharan Karthic, Kunjan Chockalingam, Chandran Vignesh, K Jawaharlal Nagarajan
In orthopedic application, bone tissue engineering (BTE) is a novel treatment method for bone defects involving bone regeneration using an artificial supporting structure called scaffold. The aim of this work is to fabricate graphene-reinforced poly(lactic acid) (PLA/Gr) scaffolds with different pore shapes (circular, square and hexagonal) and different pore sizes (1000, 1500 and 2000 μm) using the fused deposition modeling process. The characteristics of the three-dimensionally (3D) printed PLA/Gr scaffolds were analyzed through Fourier transform infrared spectroscopy, thermogravimetric analysis, derivative thermogravimetry, scanning electron microscopy and energy-dispersive X-ray spectroscopy. The water contact angle measurement showed a hydrophilic surface (70 ± 2.7°) for scaffolds with a pore size of 1000 μm. Mechanical property studies showed that the scaffold with circular 1000 μm pores had a compressive strength of 18.53 ± 0.90 MPa, which was similar to the cancellous bone value. In addition, this study involved an examination of the in vitro bioactivity, water uptake and biodegradation characteristics of the scaffolds. The results reveal that the 3D-printed PLA/Gr scaffold featuring a circular pore shape with a pore size of 1000 μm exhibits great potential as an implant for BTE.
{"title":"Characterization of 3D-printed graphene-reinforced PLA scaffold for bone regeneration","authors":"Manoharan Karthic, Kunjan Chockalingam, Chandran Vignesh, K Jawaharlal Nagarajan","doi":"10.1680/jemmr.23.00048","DOIUrl":"https://doi.org/10.1680/jemmr.23.00048","url":null,"abstract":"In orthopedic application, bone tissue engineering (BTE) is a novel treatment method for bone defects involving bone regeneration using an artificial supporting structure called scaffold. The aim of this work is to fabricate graphene-reinforced poly(lactic acid) (PLA/Gr) scaffolds with different pore shapes (circular, square and hexagonal) and different pore sizes (1000, 1500 and 2000 μm) using the fused deposition modeling process. The characteristics of the three-dimensionally (3D) printed PLA/Gr scaffolds were analyzed through Fourier transform infrared spectroscopy, thermogravimetric analysis, derivative thermogravimetry, scanning electron microscopy and energy-dispersive X-ray spectroscopy. The water contact angle measurement showed a hydrophilic surface (70 ± 2.7°) for scaffolds with a pore size of 1000 μm. Mechanical property studies showed that the scaffold with circular 1000 μm pores had a compressive strength of 18.53 ± 0.90 MPa, which was similar to the cancellous bone value. In addition, this study involved an examination of the in vitro bioactivity, water uptake and biodegradation characteristics of the scaffolds. The results reveal that the 3D-printed PLA/Gr scaffold featuring a circular pore shape with a pore size of 1000 μm exhibits great potential as an implant for BTE.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138528403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2023-09-01DOI: 10.1680/jemmr.2023.12.3.229
Hongbo Gu
{"title":"Editorial: Renewable energy materials and manufacturing of metal materials","authors":"Hongbo Gu","doi":"10.1680/jemmr.2023.12.3.229","DOIUrl":"https://doi.org/10.1680/jemmr.2023.12.3.229","url":null,"abstract":"","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139346436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To develop economical, environmentally friendly and lightweight building materials, a novel straw-filled bionic concrete hollow block (BCHB) was designed. Compression tests were conducted to determine the compressive strength of BCHB. Furthermore, the compressive and heat transfer properties of these blocks were investigated with finite element analysis, and the following results were observed. 1) The BCHB model did not easily experience local collapse, and instead, it mainly exhibited thin cracks due to shear failure, providing great cracking and collapse resistance, thereby resulting in excellent compressive performance. 2) By reducing the thickness of the short edges of the BCHB models, they exhibited great compressive and thermal insulation performance, making these the preferred BCHBs. 3) The BCHB presented herein is the simplest model of the beetle elytron plate. In contrast to a traditional hollow brick, the BCHB is proven to be a lightweight, fully enclosed brick (block) with a high hollow ratio and can be used as a new nonbearing wall material replacing the traditional type in building construction.
{"title":"A novel bionic straw-filled concrete block: compression and heat transfer performance","authors":"E. Elbashiry, N. Hao, Jinxiang Chen, Yiheng Song","doi":"10.1680/jemmr.22.00226","DOIUrl":"https://doi.org/10.1680/jemmr.22.00226","url":null,"abstract":"To develop economical, environmentally friendly and lightweight building materials, a novel straw-filled bionic concrete hollow block (BCHB) was designed. Compression tests were conducted to determine the compressive strength of BCHB. Furthermore, the compressive and heat transfer properties of these blocks were investigated with finite element analysis, and the following results were observed. 1) The BCHB model did not easily experience local collapse, and instead, it mainly exhibited thin cracks due to shear failure, providing great cracking and collapse resistance, thereby resulting in excellent compressive performance. 2) By reducing the thickness of the short edges of the BCHB models, they exhibited great compressive and thermal insulation performance, making these the preferred BCHBs. 3) The BCHB presented herein is the simplest model of the beetle elytron plate. In contrast to a traditional hollow brick, the BCHB is proven to be a lightweight, fully enclosed brick (block) with a high hollow ratio and can be used as a new nonbearing wall material replacing the traditional type in building construction.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47422589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
James Peters, Murali Manoj Ganesan, Aravindkumar Sundaram, S. Dhanabalan, Lei Xue, R. Gopal, Rajesh Kumar Manavalan, J. S. Ponraj
This study details the synthesis of high quality Cd1-xFexSnanoparticles using a simple cost-effective chemical technique in the air atmosphere. The structural analysis revealed the presence of a cubic CdS lattice with a hexagonal FeS phase in Cd1-xFexS nanoparticles. XRD results showed that the FeCl3 dosages had a significant influence on the formation of ternary Cd1-xFexS nanoparticles. The morphological analysis indicates that the Cd1-xFexS nanoparticles have a spherical shape with a size of approximately 20 nm, while CdS nanoparticles have a size of approximately 12 nm. The optical characterization revealed that the bandgap of pristine CdS and Cd1-xFexS nanoparticles decreased with an increase in Fe content. The bandgap of Cd0.8Fe0.2S was slightly higher than that of CdS, while the bandgap of Cd0.6Fe0.4S and Cd0.4Fe0.6S nanoparticles were lower than that of CdS. The energy band structures of pristine CdS and Cd1-xFexS nanoparticles were calculated using density functional theory and were compared with experimental results. In summary, this work presents a detailed investigation of the structural and optical properties of Cd1-xFexS nanoparticles synthesized using a cost-effective chemical technique. The results demonstrate the potential application of these nanoparticles in various fields such as optoelectronics, energy harvesting, and catalysis.
{"title":"Synthesis and characterization of hybrid ternary Cd1-xFexS nanoparticles synthesized by chemical method","authors":"James Peters, Murali Manoj Ganesan, Aravindkumar Sundaram, S. Dhanabalan, Lei Xue, R. Gopal, Rajesh Kumar Manavalan, J. S. Ponraj","doi":"10.1680/jemmr.22.00143","DOIUrl":"https://doi.org/10.1680/jemmr.22.00143","url":null,"abstract":"This study details the synthesis of high quality Cd1-xFexSnanoparticles using a simple cost-effective chemical technique in the air atmosphere. The structural analysis revealed the presence of a cubic CdS lattice with a hexagonal FeS phase in Cd1-xFexS nanoparticles. XRD results showed that the FeCl3 dosages had a significant influence on the formation of ternary Cd1-xFexS nanoparticles. The morphological analysis indicates that the Cd1-xFexS nanoparticles have a spherical shape with a size of approximately 20 nm, while CdS nanoparticles have a size of approximately 12 nm. The optical characterization revealed that the bandgap of pristine CdS and Cd1-xFexS nanoparticles decreased with an increase in Fe content. The bandgap of Cd0.8Fe0.2S was slightly higher than that of CdS, while the bandgap of Cd0.6Fe0.4S and Cd0.4Fe0.6S nanoparticles were lower than that of CdS. The energy band structures of pristine CdS and Cd1-xFexS nanoparticles were calculated using density functional theory and were compared with experimental results. In summary, this work presents a detailed investigation of the structural and optical properties of Cd1-xFexS nanoparticles synthesized using a cost-effective chemical technique. The results demonstrate the potential application of these nanoparticles in various fields such as optoelectronics, energy harvesting, and catalysis.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44179425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Veeraswamy Amarnath, Palaniswamy Karuppusamy, C. Rajendran
Electrolytic Tough Pitch (ETP) copper is extensively used in the manufacturing of electrical machines and automobiles. Compared to other pure coppers, ETP copper has lower weldability. Therefore, this study analyzes the weldability of ETP copper using the Gas Tungsten Arc Welding (GTAW) process. GTAW can be performed using Constant Current (CC) and Pulsed Current (PC) modes. Consequently, the properties of the joints fabricated using both modes are compared and analyzed in this study. The results show that the joint efficiencies of GTAW-CC and GTAW-PC joints are 81% and 89%, respectively. The optimal heat input and pulsating action in pulsed current mode produce refined grains in the weld zone and heat-affected zone, resulting in higher joint efficiency.
{"title":"Tensile and microstructural behavior of gas tungsten arc welded electrolytic tough pitch copper joints","authors":"Veeraswamy Amarnath, Palaniswamy Karuppusamy, C. Rajendran","doi":"10.1680/jemmr.23.00012","DOIUrl":"https://doi.org/10.1680/jemmr.23.00012","url":null,"abstract":"Electrolytic Tough Pitch (ETP) copper is extensively used in the manufacturing of electrical machines and automobiles. Compared to other pure coppers, ETP copper has lower weldability. Therefore, this study analyzes the weldability of ETP copper using the Gas Tungsten Arc Welding (GTAW) process. GTAW can be performed using Constant Current (CC) and Pulsed Current (PC) modes. Consequently, the properties of the joints fabricated using both modes are compared and analyzed in this study. The results show that the joint efficiencies of GTAW-CC and GTAW-PC joints are 81% and 89%, respectively. The optimal heat input and pulsating action in pulsed current mode produce refined grains in the weld zone and heat-affected zone, resulting in higher joint efficiency.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45862083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Compression molding is the leading fabrication process for polymer composites. The settings of process parameters highly influence the mechanical properties of composites. This manuscript optimizes the ball mixing and compression molding process parameters for the fabrication of PEEK, multiwall carbon nanotubes, and nano-hydroxyapatite-based hybrid nanocomposite by the Taguchi method. The elastic modulus examined by the nanoindentation method of static mechanical analysis was taken as the output response variable. The optimum levels of mixing time, mold temperature, mold pressure, and holding time process parameters for maximum elastic modulus were found to be 90 minutes, 400 °C, 150 bar, and 15 minutes, respectively. The ‘Analysis of Variance’ technique analyzed that the mold temperature had the highest contribution (46.82%) in enhancing the elastic modulus to the largest value. The elastic modulus and hardness of PEEK-based hybrid nanocomposite with 30 wt.% nHA and 3 wt.% MWCNTs were observed to be 83% and 65% more than that of pure PEEK. The hydrophilicity of PEEK was improved with the reinforcement of nHA, attributed to the presence of oxygen-containing functional groups in the chemical structure of nHA.
{"title":"Fabrication process optimization and characterization of nHA-CNTs reinforced PEEK hybrid nanocomposite","authors":"Rajesh Kumar, Manjeet Kumar, Sandeep Kumar","doi":"10.1680/jemmr.22.00018","DOIUrl":"https://doi.org/10.1680/jemmr.22.00018","url":null,"abstract":"Compression molding is the leading fabrication process for polymer composites. The settings of process parameters highly influence the mechanical properties of composites. This manuscript optimizes the ball mixing and compression molding process parameters for the fabrication of PEEK, multiwall carbon nanotubes, and nano-hydroxyapatite-based hybrid nanocomposite by the Taguchi method. The elastic modulus examined by the nanoindentation method of static mechanical analysis was taken as the output response variable. The optimum levels of mixing time, mold temperature, mold pressure, and holding time process parameters for maximum elastic modulus were found to be 90 minutes, 400 °C, 150 bar, and 15 minutes, respectively. The ‘Analysis of Variance’ technique analyzed that the mold temperature had the highest contribution (46.82%) in enhancing the elastic modulus to the largest value. The elastic modulus and hardness of PEEK-based hybrid nanocomposite with 30 wt.% nHA and 3 wt.% MWCNTs were observed to be 83% and 65% more than that of pure PEEK. The hydrophilicity of PEEK was improved with the reinforcement of nHA, attributed to the presence of oxygen-containing functional groups in the chemical structure of nHA.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45746727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yang Zhao, Hang Li, X. Wei, Fangchao Zhao, Dingfei Zhang
Microstructure, dynamic recrystallization (DRX) behavior and texture evolution of as-extruded Mg-6Zn-1Mn-0.2Gd (ZMG610) alloy at different extrusion condition (extrusion ratio of 25 and 45, temperature of 350 °C and 400 °C) were investigated. As-cast ZMG610 alloy was mainly comprised of α-Mg matrix, Mg7Zn3 phase and Mg3Zn6Gd (I-phase), large number of I-phase particles remained in the matrix after homogenization treatment at 330 °C up to 24 h. As-extruded ZMG610 alloy exhibited a bimodal structure consisting of fine dynamically recrystallized grains with wide orientation spread and coarse un-dynamically recrystallized grains with strong basal texture. All as-extruded samples exhibited typical basal texture with basal plane of most grains paralleled to extrusion direction (ED). The lower texture intensity could be obtained through the increase of both extrusion ratio and temperature. Optimal mechanical properties (YS of 267 MPa, UTS of 360 MPa and EL of 14.2%) were obtained through the combination of low temperature (350 °C) and high extrusion ratio (45). Amelioration of mechanical properties highly depended on the synergistic effect of dynamically recrystallized grains, I-phase particles and texture.
研究了Mg-6Zn-1Mn-0.2Gd（ZMG610）合金在不同挤压条件（挤压比为25和45，温度为350°C和400°C）下的组织、动态再结晶（DRX）行为和织构演变。铸态ZMG610合金主要由α-Mg基体、Mg7Zn3相和Mg3Zn6Gd（I相）组成，在330°C至24°C的均匀化处理后，基体中残留了大量的I相颗粒 h.挤压态ZMG610合金表现出双峰结构，由具有宽取向扩展的精细动态再结晶晶粒和具有强基底织构的粗糙非动态再结晶颗粒组成。所有的挤压样品都表现出典型的基底织构，大多数晶粒的基面平行于挤压方向（ED）。通过提高挤压比和温度可以获得较低的织构强度。最佳机械性能（YS of 267 MPa，UTS为360 MPa和14.2%的EL）。力学性能的改善在很大程度上取决于动态再结晶晶粒、I相颗粒和织构的协同作用。
{"title":"Effect of extrusion parameter on microstructure and mechanical properties of Mg-6Zn-1Mn-0.2Gd alloy","authors":"Yang Zhao, Hang Li, X. Wei, Fangchao Zhao, Dingfei Zhang","doi":"10.1680/jemmr.22.00191","DOIUrl":"https://doi.org/10.1680/jemmr.22.00191","url":null,"abstract":"Microstructure, dynamic recrystallization (DRX) behavior and texture evolution of as-extruded Mg-6Zn-1Mn-0.2Gd (ZMG610) alloy at different extrusion condition (extrusion ratio of 25 and 45, temperature of 350 °C and 400 °C) were investigated. As-cast ZMG610 alloy was mainly comprised of α-Mg matrix, Mg7Zn3 phase and Mg3Zn6Gd (I-phase), large number of I-phase particles remained in the matrix after homogenization treatment at 330 °C up to 24 h. As-extruded ZMG610 alloy exhibited a bimodal structure consisting of fine dynamically recrystallized grains with wide orientation spread and coarse un-dynamically recrystallized grains with strong basal texture. All as-extruded samples exhibited typical basal texture with basal plane of most grains paralleled to extrusion direction (ED). The lower texture intensity could be obtained through the increase of both extrusion ratio and temperature. Optimal mechanical properties (YS of 267 MPa, UTS of 360 MPa and EL of 14.2%) were obtained through the combination of low temperature (350 °C) and high extrusion ratio (45). Amelioration of mechanical properties highly depended on the synergistic effect of dynamically recrystallized grains, I-phase particles and texture.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44992769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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