Intermetallics最新文献_第2页

Silicon effects on the formation of heterogeneous intermetallic compound phases in Cu-Ni-Si(-Mn) alloys under homogenization treatment 硅对Cu-Ni-Si（-Mn）合金中非均质金属间化合物相形成的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-05 DOI: 10.1016/j.intermet.2025.108913

Hyun Woo Jeong , Ji Yong Shin , Se Hun Kwon , Hidemi Kato , Eun-Ae Choi , Seung Zeon Han

{"title":"Silicon effects on the formation of heterogeneous intermetallic compound phases in Cu-Ni-Si(-Mn) alloys under homogenization treatment","authors":"Hyun Woo Jeong , Ji Yong Shin , Se Hun Kwon , Hidemi Kato , Eun-Ae Choi , Seung Zeon Han","doi":"10.1016/j.intermet.2025.108913","DOIUrl":"10.1016/j.intermet.2025.108913","url":null,"abstract":"<div><div>This study investigates the role of silicon in the formation and evolution of heterogeneous intermetallic compound phases in Cu-Ni-Si(-Mn) alloys subjected to homogenization treatment at 980 °C. Si plays a critical role in both the intragranular and grain boundary precipitation behavior. An increase in Si content significantly enhances the volume fraction and size of intragranular δ-Ni<sub>2</sub>Si precipitates. Furthermore, it promotes morphological changes at the grain boundaries, increasing the aspect ratio of boundary precipitates and transforming them into thin, film-like G-phase structures (Mn<sub>6</sub>Ni<sub>16</sub>Si<sub>7</sub>) in Mn-containing alloys. While the overall volume fraction of grain boundary phases remains relatively stable, these Si-induced morphological changes alter the grain boundary characteristics and impact mechanical performance. In Mn-free Cu-Ni-Si alloys, higher Si content leads to the coarsening of grain boundary δ-Ni<sub>2</sub>Si precipitates, degrading both strength and ductility. In contrast, in Mn-containing alloys, the grain boundary G-phase remains stable without coarsening, even with increased Si content, which helps retain ductility (∼10 %) and enhances overall mechanical properties. These findings highlight Si as a key element in tailoring microstructures and optimizing the mechanical performance of Cu-Ni-Si(-Mn) alloys through control of intermetallic phase formation.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108913"},"PeriodicalIF":4.3,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563280","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

Simultaneous achievement of superior tensile properties and melt corrosion resistance in a single-phase BCC Ti32Nb32Ta32W4 multi-principal element alloy 在单相BCC Ti32Nb32Ta32W4多主元素合金中同时获得了优异的拉伸性能和耐熔体腐蚀性能

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-03 DOI: 10.1016/j.intermet.2025.108904

Jiangchao Hao , Zeyu Ding , Mingliang Wang , Yiping Lu

{"title":"Simultaneous achievement of superior tensile properties and melt corrosion resistance in a single-phase BCC Ti32Nb32Ta32W4 multi-principal element alloy","authors":"Jiangchao Hao , Zeyu Ding , Mingliang Wang , Yiping Lu","doi":"10.1016/j.intermet.2025.108904","DOIUrl":"10.1016/j.intermet.2025.108904","url":null,"abstract":"<div><div>Molten metal corrosion critically compromises the structural integrity of nuclear reactors, inducing accelerated material degradation that jeopardizes operational safety and plant reliability. The development of advanced corrosion-resistant structural materials emerges as an essential engineering solution to mitigate these multifaceted challenges. Here, we present a novel refractory Ta<sub>32</sub>Nb<sub>32</sub>Ti<sub>32</sub>W<sub>4</sub> high-entropy alloy (HEA) with single-phase BCC structure that demonstrates exceptional synergy between mechanical strength and molten metal corrosion resistance. Remarkably, the alloy exhibits corrosion resistance against molten cerium (Ce) comparable to pure tantalum (Ta) benchmark materials, while achieving 50 % cost reduction in raw materials. Mechanical characterization reveals remarkable enhancement with ultimate tensile strength (703.7 MPa) and yield strength (682 MPa) exceeding pure Ta counterparts by 119 % and 151 % respectively, while maintaining comparable ductility (20.4 % elongation vs. Ta's 25 %). This breakthrough establishes a new paradigm for developing cost-effective structural materials in nuclear coolant systems through refractory HEA design strategy.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108904"},"PeriodicalIF":4.3,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144535648","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

Fatigue-induced microstructural deformation and multimode defect-assisted cracking of laser powder bed fused superalloy at 650 °C 650℃激光粉末床熔合高温合金疲劳诱导的显微组织变形和多模缺陷辅助开裂

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-03 DOI: 10.1016/j.intermet.2025.108907

Chuanwen Sun , Wei Li , Ahmad Serjouei , Xiaobo Cao , Cheng Li , Rui Sun , Xiaolong Li

{"title":"Fatigue-induced microstructural deformation and multimode defect-assisted cracking of laser powder bed fused superalloy at 650 °C","authors":"Chuanwen Sun , Wei Li , Ahmad Serjouei , Xiaobo Cao , Cheng Li , Rui Sun , Xiaolong Li","doi":"10.1016/j.intermet.2025.108907","DOIUrl":"10.1016/j.intermet.2025.108907","url":null,"abstract":"<div><div>Multi-scale characterization was conducted to investigate the interior failure behavior of a laser powder bed fused (LPBF) nickel-based superalloy under fatigue cyclic loading at operating temperature of 650 °C. The results reveal a shift in crack nucleation sites with increasing fatigue life–from additive manufacturing defects to crystallographic facets. Six distinct interior fatigue failure modes were identified, each involving defect-assisted crack nucleation surrounded by faceted features. Microcracks preferentially propagated in a transgranular fracture mode under localized shear stress, leading to grain fracture and facet formation. Variations in grain orientation influenced local fracture behavior, resulting in the formation of highly uneven facets. Competition between surface, subsurface and interior crack nucleation modes was observed, particularly at lower stress levels, indicating a transition in dominant fatigue mechanisms. At elevated temperatures, facet cracking was driven by a synergistic mechanism involving anti-phase boundary shearing, precipitate bypassing, and stacking fault shearing. These findings advance the understanding of defect-microstructure interactions and provide a basis for improving fatigue life prediction and design strategies for high-temperature LPBF components.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108907"},"PeriodicalIF":4.3,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144548884","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

Strain-rate sensitivity deformation behavior of high entropy alloy fibers 高熵合金纤维的应变率敏感变形行为

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-03 DOI: 10.1016/j.intermet.2025.108908

Yan Ma , Weiming Yang , Lichen Liu , Meng Fang , Aina He , Yaqiang Dong , Qikui Man , Haishun Liu , Jiawei Li

{"title":"Strain-rate sensitivity deformation behavior of high entropy alloy fibers","authors":"Yan Ma , Weiming Yang , Lichen Liu , Meng Fang , Aina He , Yaqiang Dong , Qikui Man , Haishun Liu , Jiawei Li","doi":"10.1016/j.intermet.2025.108908","DOIUrl":"10.1016/j.intermet.2025.108908","url":null,"abstract":"<div><div>Understanding strain rate sensitivity in high-entropy alloys (HEAs) is critical for applications in engines, motors, and microelectronics. Current research focuses on bulk HEAs at millimeter scales, leaving μm-scale behavior poorly understood. This study investigates Fe<sub>34</sub>Co<sub>29</sub>Ni<sub>29</sub>Al<sub>3</sub>Ta<sub>3</sub>Si<sub>2</sub> HEA fibers with single-phase coarse-grained structures under varying tensile strain rates. Results demonstrate a 25 % increase in tensile strength and 18 % enhancement in elongation as the strain rate rises from 1 × 10<sup>−3</sup> to 5 × 10<sup>−1</sup> s<sup>−1</sup>. Deformation mechanisms transition from stacking faults, nano-grains, and L-C locks at lower rates to dislocation-dominated plasticity at higher rates driven by low stacking fault energy (∼26.15 mJ/m<sup>2</sup>). By integrating microstructural characterization with the Nemat-Nasser Li (NNL) model, we quantify the strain rate sensitivity parameter (from 0.005 to 0.03), activation volume and validate the dominance of dislocation slip at high strain rates. These findings bridge the knowledge gap in microscale HEA deformation, offering a predictive framework for engineering applications.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108908"},"PeriodicalIF":4.3,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144548883","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

Impact of heavy warm-rolling on microstructure and properties of an extremely low stacking fault energy high entropy alloy 重温轧制对极低层错能高熵合金组织和性能的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-30 DOI: 10.1016/j.intermet.2025.108903

S. Paul , R. Saha , P.P. Bhattacharjee

{"title":"Impact of heavy warm-rolling on microstructure and properties of an extremely low stacking fault energy high entropy alloy","authors":"S. Paul , R. Saha , P.P. Bhattacharjee","doi":"10.1016/j.intermet.2025.108903","DOIUrl":"10.1016/j.intermet.2025.108903","url":null,"abstract":"<div><div>This research focused on the influence of heavy (∼90 % reduction in thickness) warm-rolling (WR) on the microstructure, texture, and mechanical properties of an extremely low stacking fault energy (SFE) Co<sub>20</sub>Cr<sub>26</sub>Fe<sub>20</sub>Mn<sub>20</sub>Ni<sub>14</sub> high entropy alloy (HEA). The findings were further contextualized by comparing the results with heavy cold- (CR)/cryo-rolled (CryoR) low SFE alloys suitably. The WR was carried out at 650 °C up to 90 % thickness reduction, resulting in the formation of various microstructural features like dislocation cells (sub-structures), deformation twins, shear bands, precipitation of Cr-rich σ-phase, and a deformation-driven banded nanostructure with a remarkably fine inter-lamellar spacing of 130 ± 30 nm. Additionally, WR led to the development of a predominant brass-type texture. Annealing resulted in fully recrystallized fine microstructures up to 950 °C due to the presence of σ precipitates inhibiting grain growth; however, beyond which, the precipitates were dissolved and stimulated significant grain growth. The annealing textures showed the retention of weak α-fiber (ND//<110>) components and a high-volume fraction of random components, presumably due to the absence of dominating preferential nucleation or preferential growth mechanisms. An appreciable balance in strength-ductility (∼1 GPa-20 %) was achieved in the WR-processed HEA due to fine recrystallized grain size and large fraction of in-grain precipitates, which compared favorably with several other HEAs. Therefore, WR could be an attractive processing strategy for engineering the microstructure and properties of the low SFE HEAs.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108903"},"PeriodicalIF":4.3,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517421","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

Atomic scale insights into super-nano dual-phase amorphous-nanocrystalline iron with synergistic high strength-plasticity 具有协同高强塑性的超纳米双相非晶-纳米晶铁的原子尺度研究

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-28 DOI: 10.1016/j.intermet.2025.108902

Lusheng Wang , Long Luo , Liang Shen , Hao Liu , Jun Ding , Yu Tian , Siliang Yan

{"title":"Atomic scale insights into super-nano dual-phase amorphous-nanocrystalline iron with synergistic high strength-plasticity","authors":"Lusheng Wang , Long Luo , Liang Shen , Hao Liu , Jun Ding , Yu Tian , Siliang Yan","doi":"10.1016/j.intermet.2025.108902","DOIUrl":"10.1016/j.intermet.2025.108902","url":null,"abstract":"<div><div>To reveal the mechanical properties and plastic deformation mechanisms of super-nano dual-phase iron at the atomic scale, molecular dynamics models of amorphous iron (amorphous-Fe), nanocrystalline iron (NC-Fe), super-nano dual-phase amorphous-nanocrystalline iron (SNDP-A/NC-Fe), and super-nano dual-phase nanocrystalline-amorphous iron (SNDP-NC/A-Fe) were established. The results indicate super-nano dual-phase nanostructures have exhibit good strength-plasticity balance. The plasticity of SNDP-A/NC-Fe model exceeds that of amorphous-Fe with higher strength. The strength of SNDP-NC/A-Fe model is higher than that of the NC Fe model with excellent plasticity. The relatively uniform stress distribution leads to the good plasticity of SNDP-A/NC-Fe models owing to the suppression of nanocrystalline on shear band propagation. Additionally, the body-centered cubic (BCC) → face-centered tetragonal (FCT) phase transition lead to the reduction of strength, while the twinning behavior leads to a reduction in plasticity owing to the propagation of mature shear bands. This study has revealed the mechanical properties and plastic deformation mechanisms of body-centered cubic super-nano dual-phase structural materials at the atomic scale, providing a theoretical foundation for the design and application of low-activation steels with high strength and toughness.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108902"},"PeriodicalIF":4.3,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144502331","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

Improvement of corrosion-wear resistance of Zr-based metallic glass by pre-oxidation treatment 预氧化处理提高zr基金属玻璃的耐蚀磨损性能

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-28 DOI: 10.1016/j.intermet.2025.108897

Yu Zhang , Wenxue Wang , Yong Xiao , Jiang Ma

{"title":"Improvement of corrosion-wear resistance of Zr-based metallic glass by pre-oxidation treatment","authors":"Yu Zhang , Wenxue Wang , Yong Xiao , Jiang Ma","doi":"10.1016/j.intermet.2025.108897","DOIUrl":"10.1016/j.intermet.2025.108897","url":null,"abstract":"<div><div>Zr-based bulk metallic glasses (BMGs) are considered to have broad application prospects due to their superior mechanical properties and excellent glass forming ability (GFA). However, the wear resistance of Zr-based BMGs, especially when exposed to corrosive liquid environments, is insufficient and could decrease their service reliability in special environments. Here, we report a facile method that can significantly enhance the corrosion-wear performance of Zr-based MBGs, termed as pre-oxidation treatment (PT). The key parameters of electrochemical experiments proved that PT samples have a lower tendency to corrosion, the wear rates of the PT samples in 3.5 % NaCl neutral solution and 1N HCl acidic solution were 1.55 × 10<sup>−6</sup> mm<sup>3</sup> N<sup>−1</sup> m<sup>−1</sup> and 0.88 × 10<sup>−6</sup> mm<sup>3</sup> N<sup>−1</sup> m<sup>−1</sup>, respectively, which are significantly lower than those of the As-cast (AC) samples (29.8 × 10<sup>−6</sup> mm<sup>3</sup> N<sup>−1</sup> m<sup>−1</sup> and 44.99 × 10<sup>−6</sup> mm<sup>3</sup> N<sup>−1</sup> m<sup>−1</sup>, respectively). AC and PT samples both experienced synergistic effects of corrosion and mechanical wear, AC samples primarily experienced abrasive, adhesive, fatigue, and minor oxidative wear with corrosive wear. PT samples, with a high-hardness oxide layer, the wear debris and corrosion products could form lubrication, shown better resistance to mechanical wear, making mild abrasive and corrosive wear their main wear mechanisms. Our results demonstrates that PT can significantly enhance the corrosion-wear durability of metallic glasses, thereby unlocking engineering potential in corrosive-service environments.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108897"},"PeriodicalIF":4.3,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144502335","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

Effects of Nb addition on the damping capacity and mechanical properties of NbxCoCrFeNi2Al0.3 high-entropy alloys Nb加入对NbxCoCrFeNi2Al0.3高熵合金阻尼性能和力学性能的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-28 DOI: 10.1016/j.intermet.2025.108901

Yaqing Li, Aoxiang Li, Kaiwen Kang, Jinshan Zhang, Di Huang, Chunning Che, Borui Zhang, Saike Liu, Mingkun Xu, Yiteng Jiang, Gong Li

{"title":"Effects of Nb addition on the damping capacity and mechanical properties of NbxCoCrFeNi2Al0.3 high-entropy alloys","authors":"Yaqing Li, Aoxiang Li, Kaiwen Kang, Jinshan Zhang, Di Huang, Chunning Che, Borui Zhang, Saike Liu, Mingkun Xu, Yiteng Jiang, Gong Li","doi":"10.1016/j.intermet.2025.108901","DOIUrl":"10.1016/j.intermet.2025.108901","url":null,"abstract":"<div><div>A comprehensive investigation was conducted on Nb<sub><em>x</em></sub>CoCrFeNi<sub>2</sub>Al<sub>0.3</sub> (<em>x</em> = 0.05, 0.10, 0.15) high-entropy alloys (HEAs), focusing on their phase evolution, microstructural characteristics, damping behavior, and mechanical properties as functions of Nb content. Microstructural analysis confirmed a dual-phase constitution in the alloy system, comprising a face-centered cubic (FCC) matrix as the primary phase with dispersed Laves phase precipitates serving as the secondary phase. As the Nb molar ratio increased from <em>x</em> = 0.05 to 0.15, the volume fraction of the Laves phase exhibited a significant increasing trend, rising from 1.8 vol% to 9.0 vol%. Performance tests demonstrated that the Nb<sub>0.15</sub>CoCrFeNi<sub>2</sub>Al<sub>0.3</sub> alloy exhibited outstanding damping capacity of up to 0.055 at a strain amplitude of 3.2 × 10<sup>−4</sup>, while maintaining excellent mechanical properties. This optimized combination of damping capacity and mechanical properties enables the alloy not only to compete with conventional high-damping alloys but even to surpass them in certain key performance indicators.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108901"},"PeriodicalIF":4.3,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144502334","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 low-temperature gaseous carburization on mechanical and tribological properties of CoCrFeMnNi high-entropy alloy 低温气体渗碳对CoCrFeMnNi高熵合金力学和摩擦学性能的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-27 DOI: 10.1016/j.intermet.2025.108900

Yawei Peng , Donghui Chen , Yang Yao , Han Duan , Jianming Gong

{"title":"Effect of low-temperature gaseous carburization on mechanical and tribological properties of CoCrFeMnNi high-entropy alloy","authors":"Yawei Peng , Donghui Chen , Yang Yao , Han Duan , Jianming Gong","doi":"10.1016/j.intermet.2025.108900","DOIUrl":"10.1016/j.intermet.2025.108900","url":null,"abstract":"<div><div>This study investigated the effect of low-temperature gas carburization (LTGC) on CoCrFeMnNi high-entropy alloy (HEA), focusing on the associated microstructural evolution, as well as the resulting changes in mechanical and tribological properties. The findings demonstrate that LTGC is an effective surface strengthening treatment for CoCrFeMnNi HEA. After LTGC, a ∼32 μm thick carburized case forms on the alloy surface, characterized by high hardness (∼12.8 GPa) and high compressive residual stress (∼2.5 GPa). This case consists of an expanded FCC phase, which is a carbide-free, supersaturated interstitial solid solution of carbon atoms in the FCC lattice. LTGC exerts limited influence on the macroscopic tensile properties of CoCrFeMnNi HEA, it leads to a modest increase in ultimate tensile strength, with slight reductions in yield strength and elongation. While, LTGC can significantly improves the tribological performance, reducing the volumetric wear rate from 11.4 × 10<sup>−4</sup> to 0.45 × 10<sup>−4</sup> mm<sup>3</sup>/Nm and decreasing the coefficient of friction from 0.51 to 0.49. Additionally, the wear mechanism transitions from a combination of abrasive, adhesive, oxidative, and fatigue wear to a mixed wear mechanism primarily governed by abrasion and oxidation after LTGC.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108900"},"PeriodicalIF":4.3,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144489776","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

Machine learning for obtaining values of thermomechanical processing parameters of high-entropy alloys with desirable strength and ductility 利用机器学习获得具有理想强度和延展性的高熵合金的热力加工参数值

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-27 DOI: 10.1016/j.intermet.2025.108892

Zolfaghar Ali Akhlaghi , Hamed Shahmir , Ahmad Reza Sharafat

{"title":"Machine learning for obtaining values of thermomechanical processing parameters of high-entropy alloys with desirable strength and ductility","authors":"Zolfaghar Ali Akhlaghi , Hamed Shahmir , Ahmad Reza Sharafat","doi":"10.1016/j.intermet.2025.108892","DOIUrl":"10.1016/j.intermet.2025.108892","url":null,"abstract":"<div><div>Machine learning offers a promising and cost-effective approach to optimize thermomechanical processing and inverse design of high-entropy alloys. To obtain values of thermomechanical processing parameters including thickness reduction during rolling together with post-deformation annealing temperature and time of an equiatomic CoCrFeNiMn high-entropy alloy with desirable strength and ductility, we use neural networks for which and apply data augmentation techniques to enhance learning and performance. Besides, the performance of various other techniques, such as linear regression, k-nearest neighbors, decision trees, and ensemble models (random forest, bagging, gradient boosting, XGBoost, AdaBoost) were compared with that of neural networks. The results show that neural networks achieve superior performance, namely, an average MAPE of 8 % and an average R-squared of 91 %. The neural network was experimentally validated for three samples with target yield strengths of 450 MPa, 650 MPa, and 800 MPa, which resulted in actual values of 415 ± 22 MPa, 620 ± 31 MPa, and 745 ± 38 MPa, respectively, with uniform elongations closely matching the target of 15 %. The results demonstrate the potential of machine learning in neural networks for obtaining the values of processing parameters for high-performance new alloys.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108892"},"PeriodicalIF":4.3,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144489775","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