Intermetallics最新文献_第6页

Phase composition-guided design of nano strengthened high-entropy alloys for enhanced mechanical performance 以相组成为导向的纳米强化高熵合金力学性能增强设计

IF 4.8 2区材料科学

Intermetallics Pub Date : 2025-08-14 DOI: 10.1016/j.intermet.2025.108956

Li Feng, Gang Qin, Xu Yang, Yao Chen, Liang Wang, Ruirun Chen

{"title":"Phase composition-guided design of nano strengthened high-entropy alloys for enhanced mechanical performance","authors":"Li Feng, Gang Qin, Xu Yang, Yao Chen, Liang Wang, Ruirun Chen","doi":"10.1016/j.intermet.2025.108956","DOIUrl":"10.1016/j.intermet.2025.108956","url":null,"abstract":"<div><div>Nanoprecipitation strengthening has demonstrated significant potential in enhancing the mechanical properties of high-entropy alloys (HEAs). However, the inherent compositional complexity of HEAs poses a critical challenge in designing compositions that enable the controllable formation of coherent nano-precipitates. In this study, we introduce a phase composition tracking strategy for the rational design of nano strengthened HEAs. Applying this strategy, we developed a Co<sub>28</sub>Cr<sub>30</sub>Cu<sub>6</sub>Mn<sub>15</sub>Ni<sub>21</sub> HEA, where dense coherent spinodal decomposition-induced nano-domains were successfully introduced by aging treatment at 600 °C for 5 h. The microstructure resulted in a remarkable 37 % enhancement in yield strength (from 315 ± 10 MPa to 433 ± 10 MPa) while simultaneously improving ductility (elongation increased from 48 ± 2 % to 53 ± 2 %) in room-temperature tensile tests. Mechanistic analysis indicates that the exceptional strength-ductility synergy stems from the strengthening contribution of coherent spinodal nano-domains. This work establishes a universal paradigm for designing high-performance HEAs with tailored nanoprecipitation strengthening, offering valuable insights into the development of compositionally complex alloys for extreme engineering applications.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"186 ","pages":"Article 108956"},"PeriodicalIF":4.8,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144842172","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

First-principles study on phase formation and basic properties of M5Si3-type high-entropy refractory metal silicides m5si3型高熵难熔金属硅化物相形成及基本性质的第一性原理研究

IF 4.8 2区材料科学

Intermetallics Pub Date : 2025-08-13 DOI: 10.1016/j.intermet.2025.108959

Pengfei Zhao , Jingyi Xiao , Huicong Li, Laiqi Zhang

{"title":"First-principles study on phase formation and basic properties of M5Si3-type high-entropy refractory metal silicides","authors":"Pengfei Zhao , Jingyi Xiao , Huicong Li, Laiqi Zhang","doi":"10.1016/j.intermet.2025.108959","DOIUrl":"10.1016/j.intermet.2025.108959","url":null,"abstract":"<div><div>The M<sub>5</sub>Si<sub>3</sub>-type high-entropy refractory metal silicides (HERMS) have emerged as strong candidates for novel ultra-high temperature structural materials due to their high melting points, relatively low density, and excellent high-temperature oxidation resistance. To explore the phase formation rules of M<sub>5</sub>Si<sub>3</sub>-type HERMS and reveal the characteristics and underlying mechanisms of their fundamental properties (thereby providing theoretical support for their design and application as ultra-high temperature materials), the phase formation parameters of 70 quinary D8<sub>m</sub>-type HERMS were calculated, and the D8<sub>m</sub>-phase (MoNbReTaV)<sub>5</sub>Si<sub>3</sub> was successfully synthesized experimentally, validating the accuracy of the calculations. Electronic structure, elastic constants, and thermodynamic properties of (MoNbReTaV)<sub>5</sub>Si<sub>3</sub>, (MoNbHfZrTa)<sub>5</sub>Si<sub>3</sub>, and (MoNbHfZrV)<sub>5</sub>Si<sub>3</sub> were investigated via first-principles calculations. The results demonstrate that electrons predominantly occupy the M-4d orbitals, with the occupancy of the d orbitals being a critical factor influencing the mechanical properties of HERMS; Ta exerts a more significant toughening effect on HERMS than V; the thermodynamic stability of the three materials increases with rising temperature.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"186 ","pages":"Article 108959"},"PeriodicalIF":4.8,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144829882","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

Effect of superheating on the structure and mechanical properties of Ti-46Al-8Nb alloy induction-melted in the fused BaZrO3 crucible 过热对熔融BaZrO3坩埚中感应熔化Ti-46Al-8Nb合金组织和力学性能的影响

IF 4.8 2区材料科学

Intermetallics Pub Date : 2025-08-12 DOI: 10.1016/j.intermet.2025.108957

Lu Mao , Haitao Li , Hang Guo , Xingguang Jin , Dongdong He , Qisheng Feng , Pengyue Gao , Guangyao Chen , Chonghe Li

{"title":"Effect of superheating on the structure and mechanical properties of Ti-46Al-8Nb alloy induction-melted in the fused BaZrO3 crucible","authors":"Lu Mao , Haitao Li , Hang Guo , Xingguang Jin , Dongdong He , Qisheng Feng , Pengyue Gao , Guangyao Chen , Chonghe Li","doi":"10.1016/j.intermet.2025.108957","DOIUrl":"10.1016/j.intermet.2025.108957","url":null,"abstract":"<div><div>In this study, kilogram-level experiments for preparing the Ti-46Al-8Nb alloy were conducted using vacuum induction melting with a self-developed fused BaZrO<sub>3</sub> crucible. The effects of melting and casting temperatures (1560 °C, 1600 °C, and 1700 °C) on the alloy's oxygen content, structure, and mechanical properties were systematically investigated. The results showed that the alloy after melting at 1560 °C exhibited the lowest oxygen content (916 ppm), the smallest shrinkage cavities and cellular dendrites, along with the least amount of brittle α<sub>2</sub> phase. However, the formation of numerous microcracks within the alloy significantly deteriorated its mechanical properties. The alloy after melting at 1700 °C had the highest oxygen content (2941 ppm), the largest shrinkage cavities and dendrites, and the greatest amount of α<sub>2</sub> phase, all of which contributed to its poorest mechanical properties. In contrast, the alloy after melting at 1600 °C achieved a favorable balance among oxygen content (1169 ppm), microstructure, and phase composition, thereby exhibiting the best mechanical properties among the three alloys, with a tensile strength of 706 MPa and a fracture strain of 1.10 %.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"186 ","pages":"Article 108957"},"PeriodicalIF":4.8,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144829880","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

Tuning the mechanical properties of AlCoCrFeNi2.1 laser-welded joints through aging heat treatment 通过时效热处理调整AlCoCrFeNi2.1激光焊接接头的力学性能

IF 4.8 2区材料科学

Intermetallics Pub Date : 2025-08-06 DOI: 10.1016/j.intermet.2025.108950

Wei Wei , Lei He , He Zhang , Ze Yao , Minghua Chen , Junwen Ji , Fufa Wu

{"title":"Tuning the mechanical properties of AlCoCrFeNi2.1 laser-welded joints through aging heat treatment","authors":"Wei Wei , Lei He , He Zhang , Ze Yao , Minghua Chen , Junwen Ji , Fufa Wu","doi":"10.1016/j.intermet.2025.108950","DOIUrl":"10.1016/j.intermet.2025.108950","url":null,"abstract":"<div><div>Herein, the aging heat treatment was employed to optimize the microstructure and mechanical properties of the AlCoCrFeNi<sub>2.1</sub> laser-welded joints. Microstructural and mechanical characterizations of the as-welded and as-aged samples were conducted via X-ray diffraction, thermodynamic calculation, electron backscattered, and transmission electron microscopy. Tensile testing results of the as-aged AlCoCrFeNi<sub>2.1</sub> welded joints, when compared to as-welded counterparts, indicate that aging heat treatment enhances tensile strength with a minimal compromise in the elongation. Subsequent in-depth exploration into the strengthening mechanism uncovers that grain refinement and precipitation strengthening are primarily responsible for the improvement in the strength, with a minor decreased contribution from dislocation strengthening. The determined tensile properties of the as-welded, as-aged 6h, and as-aged 8h samples are 836.52 MPa, 905.73 MPa, 969.99 MPa of yield strength, 1188.14 MPa, 1276.90 MPa, 1481.60 MPa of ultimate tensile strength, with an elongation of 11.06 %, 9.63 %, and 9.17 %, respectively. These outcomes demonstrate the achievement of an optimal balance between strength and plasticity.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"186 ","pages":"Article 108950"},"PeriodicalIF":4.8,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144780353","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

The phase equilibria of the Cu–Zr–V system supported by experiments and CALPHAD method Cu-Zr-V体系的相平衡得到了实验和CALPHAD方法的支持

IF 4.8 2区材料科学

Intermetallics Pub Date : 2025-08-05 DOI: 10.1016/j.intermet.2025.108937

Jing Xie , Xinyue Lan , Chenggang Jin , Xinyue Huang , Shuhong Liu , Biao Hu

{"title":"The phase equilibria of the Cu–Zr–V system supported by experiments and CALPHAD method","authors":"Jing Xie , Xinyue Lan , Chenggang Jin , Xinyue Huang , Shuhong Liu , Biao Hu","doi":"10.1016/j.intermet.2025.108937","DOIUrl":"10.1016/j.intermet.2025.108937","url":null,"abstract":"<div><div>The phase equilibria of the Cu–Zr–V system at 900, 800, 700 and 600 °C were determined by X-ray diffraction (XRD) and scanning electron microscope (SEM) with energy dispersive X-ray spectrometry (EDS). The solubilities of third element in the binary phase i.e., V<sub>2</sub>Zr, Cu<sub>5</sub>Zr, Cu<sub>51</sub>Zr<sub>14</sub>, Cu<sub>10</sub>Zr<sub>7</sub>, Cu<sub>8</sub>Zr<sub>3</sub>, CuZr and CuZr<sub>2</sub>, were determined. Two ternary compounds, CuZrV and CuZr<sub>6</sub>V<sub>3</sub>, were identified, with the CuZr<sub>6</sub>V<sub>3</sub> phase being newly discovered. Compositional analyses revealed the CuZrV phase as Cu<sub>28.8</sub>Zr<sub>39.8</sub>V<sub>31.4</sub>at 900 °C and Cu<sub>33.5</sub>Zr<sub>37.3</sub>V<sub>29.2</sub> at 800 °C, while the CuZr<sub>6</sub>V<sub>3</sub> phase exhibited compositions of Cu<sub>9.0</sub>Zr<sub>57.8</sub>V<sub>33.2</sub> at 900 °C and Cu<sub>5.9</sub>Zr<sub>57.4</sub>V<sub>36.7</sub> at 700 °C. A thermodynamic assessment of the Cu-Zr-V system was performed using the CALPHAD (CALculation of PHAse Diagrams) approach, employing substitutional solution models for solution phases and sublattice models for intermetallic compounds. The ternary compounds CuZrV and CuZr<sub>6</sub>V<sub>3</sub> were described as (Cu)<sub>1</sub>(Zr)<sub>1</sub>(V)<sub>1</sub> and (Cu)<sub>1</sub>(Zr)<sub>6</sub>(V)<sub>3</sub>, respectively. A set of self-consistent thermodynamic parameters of the Cu–Zr–V system was obtained. The isothermal sections at 900, 800, 700 and 600 °C and liquidus projection were calculated, and the reaction scheme was constructed. The calculated phase equilibria show good agreement with experimental observations.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"186 ","pages":"Article 108937"},"PeriodicalIF":4.8,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771320","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

Dual enhancement mechanism for grain boundary optimization and magnetic properties in Ce magnets: The critical role of Ga/Cu in PrFe-based alloys (PrFe, PrFeGa, PrFeCuGa) Ce磁体晶界优化和磁性能的双重增强机制：Ga/Cu在PrFe基合金（PrFe, PrFeGa, prfeecuga）中的关键作用

IF 4.8 2区材料科学

Intermetallics Pub Date : 2025-08-04 DOI: 10.1016/j.intermet.2025.108940

Qingpeng Shen , Munan Yang , Sangen Luo , Ihor Bulky , Shixian Xiong , Honglong Yang , Yifan Wang , Luohan Zhang , Shuwei Zhong , Jiajie Li , Xiaoqiang Yu

{"title":"Dual enhancement mechanism for grain boundary optimization and magnetic properties in Ce magnets: The critical role of Ga/Cu in PrFe-based alloys (PrFe, PrFeGa, PrFeCuGa)","authors":"Qingpeng Shen , Munan Yang , Sangen Luo , Ihor Bulky , Shixian Xiong , Honglong Yang , Yifan Wang , Luohan Zhang , Shuwei Zhong , Jiajie Li , Xiaoqiang Yu","doi":"10.1016/j.intermet.2025.108940","DOIUrl":"10.1016/j.intermet.2025.108940","url":null,"abstract":"<div><div>To counteract the adverse effects of Ce element on the magnetic properties of NdFeB magnets, this research utilizes a grain boundary addition technique with low-melting-point PrFe-based alloy, achieving successful fabrication of magnets exhibiting dual enhancement in both remanence and coercivity. The experimental results showed that the PFG (PrFeGa) magnet exhibited an increase in coercivity from 11.45 kOe (original magnet) to 14.25 kOe with a slight improvement in remanence, while the PFCG(PrFeCuGa) magnet achieved a remanence increase of 0.52 kGs and a coercivity enhancement of 2.49 kOe. The introduction of the PrFe-based alloy optimized the grain boundary phase ratio, distribution uniformity, and fluidity, while enhancing the alignment consistency of the main phase and the proportion of Ce<sup>3+</sup> ions within its unit cells, thereby promoting the improvement of both remanence and coercivity in the magnet. First-principles calculations of formation energy demonstrate that in PFG magnets, Ga promotes the formation of antiferromagnetic 6:13:1 phase to weaken main-phase magnetic exchange coupling and enhance coercivity, while in PFCG magnets, Cu suppresses 6:13:1 phase formation but excess RE and Fe elements form Pr-rich regenerated main phase between the main phase and RE-rich phase, significantly improving remanence through increased main-phase proportion.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"186 ","pages":"Article 108940"},"PeriodicalIF":4.8,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771321","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

The effect of ultrasound on the synergistic improvement of strength and plasticity of laser-cladded AlCoCrFeNi2.1 coatings 超声对激光熔覆AlCoCrFeNi2.1涂层强度和塑性协同提高的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-25 DOI: 10.1016/j.intermet.2025.108934

Dong-Dong Zhuang , Lian-Sheng Zhang , Wang-Shi Yao , Shu-Hao Zhang , Xin-Long Lian , Shen-Yong Liang , Lei-Gang Wang

{"title":"The effect of ultrasound on the synergistic improvement of strength and plasticity of laser-cladded AlCoCrFeNi2.1 coatings","authors":"Dong-Dong Zhuang , Lian-Sheng Zhang , Wang-Shi Yao , Shu-Hao Zhang , Xin-Long Lian , Shen-Yong Liang , Lei-Gang Wang","doi":"10.1016/j.intermet.2025.108934","DOIUrl":"10.1016/j.intermet.2025.108934","url":null,"abstract":"<div><div>Ultrasound may enhance the concurrent formation of the B2 (AlNi) phase in conjunction with the FCC (CrFeCo) matrix phase during the laser cladding process. This enhancement leads to a reduction in the interphase distance and promotes a strong bonding interaction between the two phases. In comparison to the coatings prepared without ultrasonic assistance, the ultrasonic-assisted coatings exhibit a reduction in the average wear coefficient from 0.4439 to 0.4022, and a decrease in the mass wear rate from 8.8 × 10<sup>−4</sup> g/m to 6.4 × 10<sup>−4</sup> g/m. When compared to coatings fabricated without the aid of ultrasonic assistance, those produced with ultrasonic exhibit enhanced tensile strength and elongation, with values rising from 1487 MPa to 10.77 % to 2037 MPa and 17.28 %, respectively. Additionally, there is a notable change in the fracture morphology, shifting from clearly defined tearing edges to a more homogeneous ductile dimple structure. Coatings produced with the aid of ultrasound demonstrate an enhanced capacity to transfer tensile loads from the FCC phase to the high-strength B2 phase during the tensile process. This mechanism promotes the full exploitation of the synergistic effects of strength and toughness that exist between the two phases.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108934"},"PeriodicalIF":4.3,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144703505","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

Phase transformation and strengthening mechanism investigation of CrFeMnNi(2-x)Tix high entropy alloys CrFeMnNi(2-x)Tix高熵合金相变强化机理研究

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-25 DOI: 10.1016/j.intermet.2025.108933

Liangcai Du , Xiaoqing Liu , Qianqian Kong , Lichao Gong , Zhenhua Yao

{"title":"Phase transformation and strengthening mechanism investigation of CrFeMnNi(2-x)Tix high entropy alloys","authors":"Liangcai Du , Xiaoqing Liu , Qianqian Kong , Lichao Gong , Zhenhua Yao","doi":"10.1016/j.intermet.2025.108933","DOIUrl":"10.1016/j.intermet.2025.108933","url":null,"abstract":"<div><div>Understanding the intricate phase transformations and their impact on the mechanical properties holds paramount importance in developing high entropy alloys (HEAs) with ideal properties, yet it remains challenging and underexplored. In this study, a series of novel CrFeMnNi<sub>(2-x)</sub>Ti<sub>x</sub> (x = 0, 0.5, 1, and 1.5 at.%) HEAs were meticulously designed based on the established Valence Electron Concentration (VEC) rule, with the VEC values systematically varied as the atomic composition (Ni, Ti) changed. The microstructure, phase transformation behavior, mechanical properties, and strengthening mechanisms were systematically investigated. We found that the HEA powders exhibited phase behavior consistent with the VEC rules. The spark plasma sintered (SPSed) HEA bulk samples exhibited a phase transformation attributed to the precipitation of Cr and Mn within the matrix, resulting in the formation of the σ phase. Quantitative calculation of the strengthening mechanisms revealed that grain boundary strengthening and precipitation strengthening were the primary contributors to the high strength of the HEA bulk samples. These findings not only advance the utilization of the VEC rules in HEA material design but also contribute to the understanding of the phase behavior and mechanical properties of HEAs, facilitating the design of high performance HEAs.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108933"},"PeriodicalIF":4.3,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144711821","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

Features engineered hardness and yield strength prediction of septenary refractory high-entropy alloys 介绍了七阶耐火高熵合金的工程硬度和屈服强度预测

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-24 DOI: 10.1016/j.intermet.2025.108921

Shunhua Chen , Hai Xu , Wangze He , Jiaqin Liu , Yucheng Wu

{"title":"Features engineered hardness and yield strength prediction of septenary refractory high-entropy alloys","authors":"Shunhua Chen , Hai Xu , Wangze He , Jiaqin Liu , Yucheng Wu","doi":"10.1016/j.intermet.2025.108921","DOIUrl":"10.1016/j.intermet.2025.108921","url":null,"abstract":"<div><div>Refractory high-entropy alloys (HEAs) with more principal elements could have better mechanical properties, however, they also face greater challenges for designing because of larger exploration space of mechanical properties and complex physical interactions among elements. In this work, a machine learning (ML) model for the prediction of hardness and yield strength of septenary RHEAs was built. By comparing four ensemble models for 5-fold cross-validations, the CatBoost model was finally selected due to its better prediction performance. To overcome the shortcomings with limited datasets for RHEAs with increased number of principal elements, feature engineering was applied to expand the existing ordinary features. Multiple feature selection methods were combined in order to retain features that had a critical effect on hardness and yield strength. Pearson correlation coefficient was used to assess the degree of linear correlation among features. Thereafter, Shapley Additive Explanations (SHAP) was used to analyze the impact of each feature on prediction. Based on feature engineering, four RHEAs were recommended by the CatBoost model, and their mechanical properties were characterized. The results showed high accuracy for the hardness and yield strength prediction of septenary W-Nb-V-Zr-Cr-Mo-Ti RHEAs, where the WNb<sub>2</sub>V<sub>2</sub>Zr<sub>2</sub>Cr<sub>2</sub>MoTi alloy even demonstrated mean relative errors (MREs) of 0.18 % and 1.13 % for hardness and yield strength respectively. The present findings confirmed the effectiveness of feature engineering on the prediction of RHEAs with increased number of principal elements using ML models.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108921"},"PeriodicalIF":4.3,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696431","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

Designing TiAlNbZr multi-principal element (MPE) alloys for high-temperature strength enhancement TiAlNbZr多主元素（MPE）合金的高温强化设计

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-22 DOI: 10.1016/j.intermet.2025.108919

Kibeom Kim, Prince Valentine Cobbinah, Yu-Nien Shen, Yoko Yamabe-Mitarai

引用次数: 0