Intermetallics最新文献

英文中文

Tailoring Cu-Zr gradient nanoglass structures: Influence of nanoparticle size and cooling rates on glass-glass interfaces

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2025-01-02 DOI: 10.1016/j.intermet.2024.108633

Prashil S. Joshi , Xuezhen Ren , Paulo S. Branicio

The study of gradient nanoglasses (GNGs) has gained attention due to their unique mechanical properties and potential applications in advanced materials. This study employs molecular dynamics simulations to synthesize a GNG using Cu-Zr metallic glass nanoparticles (NPs) sized from 3 to 15 nm. The NPs were produced by melting and quenching metallic clusters at a relatively slow quench rate of 10⁹ K/s. The synthesis of GNG is elucidated along with the characterization of its heterogeneous metallic glass nanostructure. A seamless GNG structure is formed through cold compression of Cu₆₄Zr₃₆ amorphous NPs of varying sizes. The influence of NP size on the GNG structure is investigated, utilizing deeply relaxed NPs, which exhibit a characteristic Cu segregation pattern on their surfaces. The results highlight an increase in structural heterogeneity due to heterogeneous mass transport and the development of local composition and density variations caused by Cu segregation at glass-glass interfaces (GGIs). A reduction in NP size is correlated with decreased Cu atomic displacements and local density at GGIs, suggesting that larger NPs may produce stronger GGIs. This research presents a novel methodology for synthesizing heterogeneous metallic glasses, demonstrating the capacity to control and customize nanostructure heterogeneity through the manipulation of NP sizes and cooling rates. These findings enhance our understanding of structural evolution during nanoglass synthesis and lay the foundation for further exploration in nanomaterial synthesis and characterization.

{"title":"Tailoring Cu-Zr gradient nanoglass structures: Influence of nanoparticle size and cooling rates on glass-glass interfaces","authors":"Prashil S. Joshi , Xuezhen Ren , Paulo S. Branicio","doi":"10.1016/j.intermet.2024.108633","DOIUrl":"10.1016/j.intermet.2024.108633","url":null,"abstract":"<div><div>The study of gradient nanoglasses (GNGs) has gained attention due to their unique mechanical properties and potential applications in advanced materials. This study employs molecular dynamics simulations to synthesize a GNG using Cu-Zr metallic glass nanoparticles (NPs) sized from 3 to 15 nm. The NPs were produced by melting and quenching metallic clusters at a relatively slow quench rate of 10<sup>9</sup> K/s. The synthesis of GNG is elucidated along with the characterization of its heterogeneous metallic glass nanostructure. A seamless GNG structure is formed through cold compression of Cu<sub>64</sub>Zr<sub>36</sub> amorphous NPs of varying sizes. The influence of NP size on the GNG structure is investigated, utilizing deeply relaxed NPs, which exhibit a characteristic Cu segregation pattern on their surfaces. The results highlight an increase in structural heterogeneity due to heterogeneous mass transport and the development of local composition and density variations caused by Cu segregation at glass-glass interfaces (GGIs). A reduction in NP size is correlated with decreased Cu atomic displacements and local density at GGIs, suggesting that larger NPs may produce stronger GGIs. This research presents a novel methodology for synthesizing heterogeneous metallic glasses, demonstrating the capacity to control and customize nanostructure heterogeneity through the manipulation of NP sizes and cooling rates. These findings enhance our understanding of structural evolution during nanoglass synthesis and lay the foundation for further exploration in nanomaterial synthesis and characterization.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"178 ","pages":"Article 108633"},"PeriodicalIF":4.3,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153096","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}

引用次数: 0

Corrosion resistance and mechanical properties stability in simulated seawater of the Vit1 amorphous alloy prepared by controlled cooling rates

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2025-01-01 DOI: 10.1016/j.intermet.2024.108631

H.R. Zhang , Z.L. Shi , Y.Q. Wen , C. Wei , S.X. Liang , M.Z. Ma

In this study, Vit1 (Zr_41.2Ti_13.8Cu_12.5Ni₁₀Be_22.5) amorphous alloy has been prepared using copper, graphite, and steel molds, each with different thermal conductivity, to vary the cooling rates. The fabricated alloy samples were then immersed in a 0.6 mol/L NaCl solution for 100 days to investigate their corrosion resistance and mechanical stability. The experimental results reveal that all the Vit1 amorphous specimens prepared under three different molds exhibited excellent corrosion resistance in the simulated seawater. After 100 days of immersion, the weight losses of the Vit1 amorphous specimens prepared using copper, graphite, and steel molds were 19.47, 29.32, 29.48 mg/cm², respectively, corresponding to the corrosion rates of 0.1159, 0.1754, and 0.1755 mm/year. Additionally, the tensile strength of all the specimens remained almost unchanged (with a variation of less than 3.5 %), indicating outstanding stability of mechanical properties. Compared to a titanium alloy used as a control sample, the Vit1 alloy showed superior resistance to corrosion-degradation of mechanical properties. Further analysis manifested that the mechanical properties of the Vit1 amorphous alloy after immersion were mainly influenced by its internal microstructure.

{"title":"Corrosion resistance and mechanical properties stability in simulated seawater of the Vit1 amorphous alloy prepared by controlled cooling rates","authors":"H.R. Zhang , Z.L. Shi , Y.Q. Wen , C. Wei , S.X. Liang , M.Z. Ma","doi":"10.1016/j.intermet.2024.108631","DOIUrl":"10.1016/j.intermet.2024.108631","url":null,"abstract":"<div><div>In this study, Vit1 (Zr<sub>41.2</sub>Ti<sub>13.8</sub>Cu<sub>12.5</sub>Ni<sub>10</sub>Be<sub>22.5</sub>) amorphous alloy has been prepared using copper, graphite, and steel molds, each with different thermal conductivity, to vary the cooling rates. The fabricated alloy samples were then immersed in a 0.6 mol/L NaCl solution for 100 days to investigate their corrosion resistance and mechanical stability. The experimental results reveal that all the Vit1 amorphous specimens prepared under three different molds exhibited excellent corrosion resistance in the simulated seawater. After 100 days of immersion, the weight losses of the Vit1 amorphous specimens prepared using copper, graphite, and steel molds were 19.47, 29.32, 29.48 mg/cm<sup>2</sup>, respectively, corresponding to the corrosion rates of 0.1159, 0.1754, and 0.1755 mm/year. Additionally, the tensile strength of all the specimens remained almost unchanged (with a variation of less than 3.5 %), indicating outstanding stability of mechanical properties. Compared to a titanium alloy used as a control sample, the Vit1 alloy showed superior resistance to corrosion-degradation of mechanical properties. Further analysis manifested that the mechanical properties of the Vit1 amorphous alloy after immersion were mainly influenced by its internal microstructure.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"178 ","pages":"Article 108631"},"PeriodicalIF":4.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153126","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}

引用次数: 0

Enhancing strain hardening in TiVZr lightweight medium entropy alloys with Mn-induced maze-like nanostructure

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2024-12-31 DOI: 10.1016/j.intermet.2024.108630

Liyun Ru , Yan Wang , Yichao Zhu , Zefeng Wang , Benpeng Wang , Yao-Jian Liang , Yunfei Xue

Although lightweight high/medium entropy alloys (HEAs/MEAs) with a body-centered cubic (BCC) structure are a promising class of structural materials, their actual applications are limited due to their low strain-hardening ability. This work proposes a method of enhancing the strain-hardening ability of TiVZr lightweight MEA by a small amount of Mn element. The TiVZr_0.1Mn_0.1 exhibits a “maze-like” nanostructure that promotes dislocation multiplication during deformation, resulting in improved strength, strain hardening ability, and uniform elongation (>10 %). The considerable difference in lattice parameters between the Mn and TiVZr solid solution matrix contributes to significant solid solution strengthening, demonstrating a high specific tensile yield strength (∼180 MPa cm³/g).

引用次数: 0

NbMoVTa refractory high-entropy alloy incorporated WNi matrix composite as a future plasma-facing material: Evaluation of mechanical properties and helium ion irradiation behavior

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2024-12-31 DOI: 10.1016/j.intermet.2024.108621

Burçak Boztemur , Kaan Filiz , Zahide Karagüney , Eyüpcan Gökaydın , Yasin Bozkurt , Ceren Özbasmacı , Kübra Gürcan Bayrak , Yue Xu , Laima Luo , Duygu Ağaoğulları , M. Lütfi Öveçoğlu

Refractory high-entropy alloys (RHEAs) have gained attention in the last decades with their high mechanical strength, self-healing mechanism, and high irradiation resistance. These materials are evaluated to have a high potential as plasma-facing materials for fusion reactors. In this study, helium ion irradiation and mechanical behaviors of the RHEA-reinforced WNi matrix composites were investigated based on this perspective. Equimolar molybdenum, niobium, tantalum and vanadium powders were mechanically alloyed for 6 h to produce NbMoVTa RHEA with a single BCC phase. Then, different amounts (10, 20, 30, and 40 wt%) of RHEA were added into the W1Ni (containing 99 wt% W and 1 wt% Ni) matrix by planetary ball milling for 72 h. Consolidation was conducted by spark plasma sintering technique (1410 °C, 1 min). X-ray diffraction, scanning electron microscopy coupled with energy dispersion spectroscopy, and Archimedes' density analyses were performed on the composites. Moreover, wear and hardness properties of the composites were examined, and the lowest specific wear rate (0.59 mm³/N.m × 10⁻⁵) and the highest hardness value (10.10 GPa) were found for the W1Ni-40RHEA composite. Helium irradiation was exposed to the composites to observe their irradiation resistance. It was observed that the lowest increment and the least deformation were obtained with the SPS'ed W1Ni-40RHEA composite. With the analysis of He⁺ irradiation, it was determined that the effect of radiation on mechanical properties is irrelevant. Also, it was observed that the addition of RHEA into the W matrix can create a high potential for using plasma-facing material. Moreover, it decreased the problems of tungsten against He⁺ irradiation.

{"title":"NbMoVTa refractory high-entropy alloy incorporated WNi matrix composite as a future plasma-facing material: Evaluation of mechanical properties and helium ion irradiation behavior","authors":"Burçak Boztemur , Kaan Filiz , Zahide Karagüney , Eyüpcan Gökaydın , Yasin Bozkurt , Ceren Özbasmacı , Kübra Gürcan Bayrak , Yue Xu , Laima Luo , Duygu Ağaoğulları , M. Lütfi Öveçoğlu","doi":"10.1016/j.intermet.2024.108621","DOIUrl":"10.1016/j.intermet.2024.108621","url":null,"abstract":"<div><div>Refractory high-entropy alloys (RHEAs) have gained attention in the last decades with their high mechanical strength, self-healing mechanism, and high irradiation resistance. These materials are evaluated to have a high potential as plasma-facing materials for fusion reactors. In this study, helium ion irradiation and mechanical behaviors of the RHEA-reinforced WNi matrix composites were investigated based on this perspective. Equimolar molybdenum, niobium, tantalum and vanadium powders were mechanically alloyed for 6 h to produce NbMoVTa RHEA with a single BCC phase. Then, different amounts (10, 20, 30, and 40 wt%) of RHEA were added into the W1Ni (containing 99 wt% W and 1 wt% Ni) matrix by planetary ball milling for 72 h. Consolidation was conducted by spark plasma sintering technique (1410 °C, 1 min). X-ray diffraction, scanning electron microscopy coupled with energy dispersion spectroscopy, and Archimedes' density analyses were performed on the composites. Moreover, wear and hardness properties of the composites were examined, and the lowest specific wear rate (0.59 mm<sup>3</sup>/N.m × 10<sup>−5</sup>) and the highest hardness value (10.10 GPa) were found for the W1Ni-40RHEA composite. Helium irradiation was exposed to the composites to observe their irradiation resistance. It was observed that the lowest increment and the least deformation were obtained with the SPS'ed W1Ni-40RHEA composite. With the analysis of He<sup>+</sup> irradiation, it was determined that the effect of radiation on mechanical properties is irrelevant. Also, it was observed that the addition of RHEA into the W matrix can create a high potential for using plasma-facing material. Moreover, it decreased the problems of tungsten against He<sup>+</sup> irradiation.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"178 ","pages":"Article 108621"},"PeriodicalIF":4.3,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153152","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}

引用次数: 0

Self-thermal cycling rejuvenation of Zr-based bulk metallic glasses by the treatment of loading direct current

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2024-12-30 DOI: 10.1016/j.intermet.2024.108622

Guanting Liu , Yating Zhou , Wenqi Chen , Guanghui Xing , Jichao Qiao , Tuo Wang

The potential applications of bulk metallic glasses (BMGs) are constrained by their brittleness at room temperature. In this study, a method of pre-loading direct current was proposed to increase the plasticity of Zr-based BMGs. It was proved that the treatment of loading direct current improved the energy and rejuvenated the structure of Zr₆₀Ni₂₅Al₁₅ BMG. The series parallel resistance model and finite element simulation of the two-dimensional region module show that the current will choose a preferred path through the Zr₆₀Ni₂₅Al₁₅ BMG and generation of Joule's heat along this path. The temperature difference between the preferred path of the current and the environment promoted self-thermal cycling of BMGs, resulting in the rejuvenation of the structure of Zr₆₀Ni₂₅Al₁₅ BMG.

引用次数: 0

Charpy impact behavior and fracture mechanisms in cost-effective ferrous medium-entropy alloy at ambient and cryogenic temperatures

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2024-12-30 DOI: 10.1016/j.intermet.2024.108628

Yuhang Shi , Liangbin Chen , Tinghui Cao , Ran Wei , Zhongyue Yang , Yaohui Li , Chong Yang , Xuxiang Wan , Yake Wu , Feng Jiang

The cost-effective ferrous medium-entropy alloys (MEAs) exhibit excellent quasi-static tensile property especially at cryogenic temperature, whereas their impact property under high loading rate is still unclear. In this work, the tensile and Charpy impact behaviors of Fe₆₂Co₅Ni₁₀Cr₁₃Si₇Al₃ (at. %) ferrous MEA have been thoroughly investigated at 298 K and 77 K, respectively. The tensile mechanical response shows that as the temperature decrease from 298 K to 77 K, the prepared ferrous MEA comprising 86 vol% face-centered cubic (FCC) phase and 14 vol% body-centered cubic (BCC) phase shows significantly improved yield strength from 986 MPa to 1252 MPa and tensile strength from 1186 MPa to 2016 MPa, along with a comparable ductility. While outstanding combination of impact toughness and yield strength outperforms most other metallic materials, it is undeniable that the impact absorbed energy sharply decrease from 95.5 J at 298 K to 32.2 J at 77 K. The substantial reduced plastic zone ahead of crack tip coupled with the transition of micro-fracture mechanism from ductile dimples to a mixture of dimples and cleavages, which is not conducive to energy consumption during crack propagation, is responsible for the reduced impact toughness.

{"title":"Charpy impact behavior and fracture mechanisms in cost-effective ferrous medium-entropy alloy at ambient and cryogenic temperatures","authors":"Yuhang Shi , Liangbin Chen , Tinghui Cao , Ran Wei , Zhongyue Yang , Yaohui Li , Chong Yang , Xuxiang Wan , Yake Wu , Feng Jiang","doi":"10.1016/j.intermet.2024.108628","DOIUrl":"10.1016/j.intermet.2024.108628","url":null,"abstract":"<div><div>The cost-effective ferrous medium-entropy alloys (MEAs) exhibit excellent quasi-static tensile property especially at cryogenic temperature, whereas their impact property under high loading rate is still unclear. In this work, the tensile and Charpy impact behaviors of Fe<sub>62</sub>Co<sub>5</sub>Ni<sub>10</sub>Cr<sub>13</sub>Si<sub>7</sub>Al<sub>3</sub> (at. %) ferrous MEA have been thoroughly investigated at 298 K and 77 K, respectively. The tensile mechanical response shows that as the temperature decrease from 298 K to 77 K, the prepared ferrous MEA comprising 86 vol% face-centered cubic (FCC) phase and 14 vol% body-centered cubic (BCC) phase shows significantly improved yield strength from 986 MPa to 1252 MPa and tensile strength from 1186 MPa to 2016 MPa, along with a comparable ductility. While outstanding combination of impact toughness and yield strength outperforms most other metallic materials, it is undeniable that the impact absorbed energy sharply decrease from 95.5 J at 298 K to 32.2 J at 77 K. The substantial reduced plastic zone ahead of crack tip coupled with the transition of micro-fracture mechanism from ductile dimples to a mixture of dimples and cleavages, which is not conducive to energy consumption during crack propagation, is responsible for the reduced impact toughness.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"178 ","pages":"Article 108628"},"PeriodicalIF":4.3,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153128","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}

引用次数: 0

Face-centered-cubic-structured (Co0.4Fe0.3Ni0.3)100-x(Al0.4Mn0.6)x high-entropy alloy with enhanced soft magnetic properties and tensile ductility

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2024-12-30 DOI: 10.1016/j.intermet.2024.108629

B.R. Sun , X.H. Xu , L.R. Zhang , J.R. Zhao , S.W. Xin , P.K. Liaw , T.D. Shen

High saturation induction (B_s), low coercivity (H_C), and good formability are very important for the application of magnetic high-entropy alloys (MHEAs). Unfortunately, the coercivity (H_C) of these MHEAs is often located between ∼ 100 and 10,000 A/m, making them semi-hard rather than soft magnetic materials. In addition, most previous MHEAs have a body-centered-cubic (BCC) crystallographic structure or a mixture of BCC and face-centered cubic (FCC) structures and thus do not possess a high tensile ductility. Here, we report FCC-structured (Co_0.4Fe_0.3Ni_0.3)_100-x(Al_0.4Mn_0.6)_x MHEAs with excellent soft magnetic properties and high tensile ductility. Our as-cast FCC (Co_0.4Fe_0.3Ni_0.3)₉₅(Al_0.4Mn_0.6)₅ MHEA has B_S of 1.44 T, H_C of 44.8 A/m, and total tensile elongation of 52 %. After annealing at 1200 °C, the B_S increases to 1.51 T, the H_C decreases to 40.6 A/m, and the total elongation slightly increases to 54 %. Such an outstanding combination of high B_S (∼1.5 T), low H_C (∼40 A/m), and exceptional tensile ductility (∼54 %) is much superior to that achieved in previous MHEAs. The structure-property relations are analyzed to explain the good magnetic and mechanical performances achieved in the present FCC-structured MHEAs. The present study should help design a new type of magnetic materials with both attractive magnetic properties and superior processability.

{"title":"Face-centered-cubic-structured (Co0.4Fe0.3Ni0.3)100-x(Al0.4Mn0.6)x high-entropy alloy with enhanced soft magnetic properties and tensile ductility","authors":"B.R. Sun , X.H. Xu , L.R. Zhang , J.R. Zhao , S.W. Xin , P.K. Liaw , T.D. Shen","doi":"10.1016/j.intermet.2024.108629","DOIUrl":"10.1016/j.intermet.2024.108629","url":null,"abstract":"<div><div>High saturation induction (<em>B</em><sub>s</sub>), low coercivity (<em>H</em><sub>C</sub>), and good formability are very important for the application of magnetic high-entropy alloys (MHEAs). Unfortunately, the coercivity (<em>H</em><sub>C</sub>) of these MHEAs is often located between ∼ 100 and 10,000 A/m, making them semi-hard rather than soft magnetic materials. In addition, most previous MHEAs have a body-centered-cubic (BCC) crystallographic structure or a mixture of BCC and face-centered cubic (FCC) structures and thus do not possess a high tensile ductility. Here, we report FCC-structured (Co<sub>0.4</sub>Fe<sub>0.3</sub>Ni<sub>0.3</sub>)<sub>100-x</sub>(Al<sub>0.4</sub>Mn<sub>0.6</sub>)<sub>x</sub> MHEAs with excellent soft magnetic properties and high tensile ductility. Our as-cast FCC (Co<sub>0.4</sub>Fe<sub>0.3</sub>Ni<sub>0.3</sub>)<sub>95</sub>(Al<sub>0.4</sub>Mn<sub>0.6</sub>)<sub>5</sub> MHEA has <em>B</em><sub>S</sub> of 1.44 T, <em>H</em><sub>C</sub> of 44.8 A/m, and total tensile elongation of 52 %. After annealing at 1200 °C, the <em>B</em><sub>S</sub> increases to 1.51 T, the <em>H</em><sub>C</sub> decreases to 40.6 A/m, and the total elongation slightly increases to 54 %. Such an outstanding combination of high <em>B</em><sub>S</sub> (∼1.5 T), low <em>H</em><sub>C</sub> (∼40 A/m), and exceptional tensile ductility (∼54 %) is much superior to that achieved in previous MHEAs. The structure-property relations are analyzed to explain the good magnetic and mechanical performances achieved in the present FCC-structured MHEAs. The present study should help design a new type of magnetic materials with both attractive magnetic properties and superior processability.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"178 ","pages":"Article 108629"},"PeriodicalIF":4.3,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153125","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}

引用次数: 0

Deposition of iron aluminide through laser direct energy deposition of Aluminum on steel substrate

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2024-12-27 DOI: 10.1016/j.intermet.2024.108623

Minsu Park , Chanho Park , Haeju Jo , Taeyoon Kim , Wookjin Lee

Fe-rich iron aluminides are promising high-temperature oxidation resistant coating materials for steel. This study aims to evaluate the feasibility of depositing Fe-rich iron aluminides on steels through an interfacial reaction between the aluminum, which was deposited using laser direct energy deposition (L-DED), and the substrate. Al-10Si-Mg and AISI 1045 were selected as the aluminum powder and steel substrates, respectively. The interfacial reaction was investigated by varying the laser power and powder feed rate. Fe-rich iron aluminide was successfully deposited under optimal conditions using L-DED, and it exhibited a B2 crystal structure regardless of the Al content. The increase in the laser power and feed rate increased the vertical cracks, which eventually led to the formation of delamination cracks. The Fe-rich iron aluminide exhibited a higher hardness and wear resistance than the steel substrate.

引用次数: 0

Atomic structure evolution of magnetic HoErCo alloy metallic glass microwires at cryogenic temperatures

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2024-12-27 DOI: 10.1016/j.intermet.2024.108625

Ying Bao , Jiacheng Dong , Xilei Bian , Hangboce Yin , Jierong Liang , Yixuan Zhang , Yongjiang Huang , Hongxian Shen

The thermal strain in metallic glass (MG) can induce defect activation and alter the magnetocaloric properties, making it crucial to understand the atomic structure changes at cryogenic temperatures. This study investigated the evolution of the atomic structure and volume variation of HoErCo MG microwires as the temperature drops to the cryogenic level using in-situ high-energy synchrotron X-ray diffraction. As the temperature decreases, atomic vibrations diminish, and the disorder within the MG decreases due to cooling contraction, resulting in a reduction in average atomic volume. Through analysis of partial coordination numbers, the study revealed the formation of various solute-centered clusters during cooling. Specifically, larger rare earth (RE) elements tend to migrate toward the center of the clusters, while cobalt (Co) atoms move outward. In alloy microwires, RE atoms are more likely to aggregate with Co atoms, forming Co-RE clusters with Co at the center. This research provides a strategy for investigating the deformation and physical properties of amorphous alloys at cryogenic temperatures, potentially enabling accurate prediction of MG materials’ behavior under such conditions.

{"title":"Atomic structure evolution of magnetic HoErCo alloy metallic glass microwires at cryogenic temperatures","authors":"Ying Bao , Jiacheng Dong , Xilei Bian , Hangboce Yin , Jierong Liang , Yixuan Zhang , Yongjiang Huang , Hongxian Shen","doi":"10.1016/j.intermet.2024.108625","DOIUrl":"10.1016/j.intermet.2024.108625","url":null,"abstract":"<div><div>The thermal strain in metallic glass (MG) can induce defect activation and alter the magnetocaloric properties, making it crucial to understand the atomic structure changes at cryogenic temperatures. This study investigated the evolution of the atomic structure and volume variation of HoErCo MG microwires as the temperature drops to the cryogenic level using in-situ high-energy synchrotron X-ray diffraction. As the temperature decreases, atomic vibrations diminish, and the disorder within the MG decreases due to cooling contraction, resulting in a reduction in average atomic volume. Through analysis of partial coordination numbers, the study revealed the formation of various solute-centered clusters during cooling. Specifically, larger rare earth (RE) elements tend to migrate toward the center of the clusters, while cobalt (Co) atoms move outward. In alloy microwires, RE atoms are more likely to aggregate with Co atoms, forming Co-RE clusters with Co at the center. This research provides a strategy for investigating the deformation and physical properties of amorphous alloys at cryogenic temperatures, potentially enabling accurate prediction of MG materials’ behavior under such conditions.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"178 ","pages":"Article 108625"},"PeriodicalIF":4.3,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153129","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}

引用次数: 0

Achieving high strength-ductility synergy in iron-rich medium -entropy alloy by structure change after heat treatment

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2024-12-27 DOI: 10.1016/j.intermet.2024.108624

Zehong Zheng , Li Jin , Qingkai Shen , Xiaoyan Yu , Ning Ou , Changwen Dong , Qiang Zhu , Jiaxiang Xue

Iron-rich medium-entropy alloys have attracted significant research interest due to their cost-effectiveness. In previous work, most alloy properties were tuned by adjusting the elemental composition. However, this is not the sole method for regulating alloy properties. Thermo-Calc simulations indicated that these alloys could exhibit varying proportions of soft and hard phases in different solidified states, influencing their mechanical properties. Therefore, it is crucial to investigate the potential impact of subsequent heat treatment processes and secondary phase precipitation on the microstructure and mechanical properties of these alloys. A comprehensive study was conducted to characterize the microstructure and mechanical properties of both as-cast and heat-treated alloys. After annealing at 1300 °C for 1 h, followed by aging at 850 °C for 10 h, the as-cast alloy exhibited notable changes in phase composition: the FCC phase decreased from 83.66 ± 2.00 % to 78.80 ± 2.03 %, the BCC phase increased from 0.20 ± 0.05 % to 2.61 ± 0.01 %, and the B2 phase increased from 16.1 ± 0.25 % to 18.6 ± 0.01 %. These phase transformations resulted in an increase in the yield strength from 301.7 ± 5.0 MPa to 480.7 ± 13.6 MPa, accompanied by a decrease in elongation from 40.4 ± 3.0 % to 32.1 ± 1.8 %. The enhancement in yield strength was primarily attributed to the homogeneous precipitation of the B2 phase within the FCC matrix. These findings provide valuable insights for the optimization of heat treatment processes in iron-rich medium-entropy alloys.

{"title":"Achieving high strength-ductility synergy in iron-rich medium -entropy alloy by structure change after heat treatment","authors":"Zehong Zheng , Li Jin , Qingkai Shen , Xiaoyan Yu , Ning Ou , Changwen Dong , Qiang Zhu , Jiaxiang Xue","doi":"10.1016/j.intermet.2024.108624","DOIUrl":"10.1016/j.intermet.2024.108624","url":null,"abstract":"<div><div>Iron-rich medium-entropy alloys have attracted significant research interest due to their cost-effectiveness. In previous work, most alloy properties were tuned by adjusting the elemental composition. However, this is not the sole method for regulating alloy properties. Thermo-Calc simulations indicated that these alloys could exhibit varying proportions of soft and hard phases in different solidified states, influencing their mechanical properties. Therefore, it is crucial to investigate the potential impact of subsequent heat treatment processes and secondary phase precipitation on the microstructure and mechanical properties of these alloys. A comprehensive study was conducted to characterize the microstructure and mechanical properties of both as-cast and heat-treated alloys. After annealing at 1300 °C for 1 h, followed by aging at 850 °C for 10 h, the as-cast alloy exhibited notable changes in phase composition: the FCC phase decreased from 83.66 ± 2.00 % to 78.80 ± 2.03 %, the BCC phase increased from 0.20 ± 0.05 % to 2.61 ± 0.01 %, and the B2 phase increased from 16.1 ± 0.25 % to 18.6 ± 0.01 %. These phase transformations resulted in an increase in the yield strength from 301.7 ± 5.0 MPa to 480.7 ± 13.6 MPa, accompanied by a decrease in elongation from 40.4 ± 3.0 % to 32.1 ± 1.8 %. The enhancement in yield strength was primarily attributed to the homogeneous precipitation of the B2 phase within the FCC matrix. These findings provide valuable insights for the optimization of heat treatment processes in iron-rich medium-entropy alloys.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"178 ","pages":"Article 108624"},"PeriodicalIF":4.3,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153899","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}

引用次数: 0

首页上一页

类型

全部化学•材料生命科学医学物理工程技术环境•农林材料科学地球科学法学管理学化学环境科学与生态学计算机科学教育学经济学农林科学人文科学生物学数学物理与天体物理心理学综合性期刊其他工业工程理学历史学农学文学信息工程

数据库

全部 ACS Publications Elsevier ieeexplore Springer The Royal Society of Chemistry Wiley

期刊

Intermetallics

全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.

﹀