Intermetallics最新文献_第9页

Process optimization and performance of spark plasma sintered Ta-10W alloy 火花等离子烧结 Ta-10W 合金的工艺优化与性能

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-09-18 DOI: 10.1016/j.intermet.2024.108495

Yingjie Yu , Yi Xu , Xingyun Duan , Shuai Zhu , Yaping Lei , Haiqing Xia , Ao Wang , Qiong Jiang , Jiancheng Tang

{"title":"Process optimization and performance of spark plasma sintered Ta-10W alloy","authors":"Yingjie Yu , Yi Xu , Xingyun Duan , Shuai Zhu , Yaping Lei , Haiqing Xia , Ao Wang , Qiong Jiang , Jiancheng Tang","doi":"10.1016/j.intermet.2024.108495","DOIUrl":"10.1016/j.intermet.2024.108495","url":null,"abstract":"<div><p>Ta-10W alloy has the advantages of excellent high temperature strength, high ductility, good weldability and excellent corrosion resistance, and is widely used in chemical and aerospace fields. At present, the commerical tantalum-tungsten alloy products are mainly prepared by vacuum electron beam melting method, but the processing costs a lot which is attributable to its cumbersome processing process. Compared with it, although the tantalum alloy prepared by powder metallurgy is slightly less plastic, it has higher strength. In this work, Tantalum-tungsten (10 wt% W) mixed powder was used as raw material, and Ta-10W alloy was prepared by spark plasma sintering (SPS) technology, and high-performance Ta-10W alloy was prepared by changing the sintering parameters. The test results indicated that the sample had the best mechanical properties at the sintering process 2 (1900 °C, 40 MPa, 10 min). Its hardness was 434.38 HV<sub>0.2</sub>, the yield strength of compression at room temperature was 1370 MPa, and it had a good elongation (44.8 %). Its average friction coefficient was 0.677 and abrasive wear was the dominant wear mechanism. Besides, the Ta-10W alloy prepared by SPS exhibited brittle fractures, and the presence of brittle phases, W phase, Ta<sub>2</sub>O<sub>5</sub> and Ta<sub>2</sub>C further deteriorated sintered Ta-10W's mechanical properties.</p></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"175 ","pages":"Article 108495"},"PeriodicalIF":4.3,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241829","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}

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Effect of static magnetic field on the chemical short-range order of CoCrFeMnNi high-entropy alloy prepared by laser powder bed fusion 静磁场对激光粉末床熔融制备的 CoCrFeMnNi 高熵合金化学短程有序性的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-09-17 DOI: 10.1016/j.intermet.2024.108498

Shuai Guo , Yufan Zhao , Shang Sui , Pengcheng Zhu , Meng Wang , Xuehui Hao , Yulai Song , Anfu Guo , Junjie Ni , Yuanbin Qin , Xin Lin

{"title":"Effect of static magnetic field on the chemical short-range order of CoCrFeMnNi high-entropy alloy prepared by laser powder bed fusion","authors":"Shuai Guo , Yufan Zhao , Shang Sui , Pengcheng Zhu , Meng Wang , Xuehui Hao , Yulai Song , Anfu Guo , Junjie Ni , Yuanbin Qin , Xin Lin","doi":"10.1016/j.intermet.2024.108498","DOIUrl":"10.1016/j.intermet.2024.108498","url":null,"abstract":"<div><p>Recently, laser powder bed fusion (LPBF) has emerged as a potential technique for manipulating chemical short-range order (CSRO) in high-entropy alloys (HEAs), eliminating the need for homogenization treatment. The application of the magnetic field in LPBF has shown promise in refining the microstructure and optimizing the mechanical properties. However, the precise influence of magnetic field on the CSRO of LPBF-processed HEAs remains inadequately understood. Therefore, in this study, we investigate the impact of the static magnetic field on the CSRO of LPBF-processed HEAs. The findings reveal that the presence of the static magnetic field results in a reduction in CSRO, including the size and area fraction. This behavior can be attributed to the influence of the static magnetic field on the melt flow, which is perturbed by the electromagnetic damping effect and thermos-electromagnetic forces, thereby impeding the free diffusion of atoms and ultimately leading to a decrease in CSRO.</p></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"175 ","pages":"Article 108498"},"PeriodicalIF":4.3,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241827","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

Microstructure evolution and mechanical properties of NiAlCrFeMo high entropy superalloy after different annealing treatment 不同退火处理后 NiAlCrFeMo 高熵超合金的微观结构演变和力学性能

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-09-17 DOI: 10.1016/j.intermet.2024.108494

Wenhan Yu , Yuanming Huo , Zhijun Wang , Zhenrong Yan , Tao He , Seyed Reza Elmi Hosseini , Hongchao Ji , Hao Chen

{"title":"Microstructure evolution and mechanical properties of NiAlCrFeMo high entropy superalloy after different annealing treatment","authors":"Wenhan Yu , Yuanming Huo , Zhijun Wang , Zhenrong Yan , Tao He , Seyed Reza Elmi Hosseini , Hongchao Ji , Hao Chen","doi":"10.1016/j.intermet.2024.108494","DOIUrl":"10.1016/j.intermet.2024.108494","url":null,"abstract":"<div><p>A novel NiAlCrFeMo high entropy superalloy was prepared using the vacuum arc melting method, followed by annealing at 800 °C, 1000 °C, and 1200 °C for 10 h. The microstructural characteristics and mechanical properties of the alloy after annealing were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Vickers hardness testing, and high-temperature tensile testing. The results indicate that the as-cast alloy consists of dendritic γ+γ′ phases and interdendritic B2-type β phase, with hemispherical α-Cr phases present within the β phase. Compared to the as-cast status, the volume fraction of the β phase in the annealed state increased from 18.52 % to 26.13 %. Notably, at 800 °C/10h, acicular γ<sub>p</sub>’ phases precipitated within the β phase. The alloy exhibited varying degrees of improvement in both strength and ductility after annealing. The specimen annealed at 800 °C/10h showed the highest strength (σ<sub>YS</sub> = 181.06 MPa) and good ductility (ε<sub>EI</sub> = 12.45 %), with strength increasing by approximately 13.10 % compared to the as-cast status. This improvement is attributed to the coarsening of the α-Cr phase, the transformation in γ′ morphology, and the precipitation of acicular γ<sub>p</sub>’ phase. At 1200 °C/10h, all precipitates dissolved into the matrix, resulting in the lowest strength (σ<sub>YS</sub> = 134.08 MPa) and the highest ductility (ε<sub>EI</sub> = 15.54 %).</p></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"175 ","pages":"Article 108494"},"PeriodicalIF":4.3,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241828","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

Microstructure and properties of FeCoNiCr and FeCoNiCrW high entropy alloy coatings by electro-deposition 通过电沉积获得的铁钴镍铬和铁钴镍铬瓦高熵合金镀层的微观结构和性能

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-09-16 DOI: 10.1016/j.intermet.2024.108492

Meiling Dong, Pengwei Liu, Chaohui Wang, Yuhui Wang, Xinyao Tang, Mingxin He, Jiaqi Liu

{"title":"Microstructure and properties of FeCoNiCr and FeCoNiCrW high entropy alloy coatings by electro-deposition","authors":"Meiling Dong, Pengwei Liu, Chaohui Wang, Yuhui Wang, Xinyao Tang, Mingxin He, Jiaqi Liu","doi":"10.1016/j.intermet.2024.108492","DOIUrl":"10.1016/j.intermet.2024.108492","url":null,"abstract":"<div><p>The FeCoNiCr and FeCoNiCrW high-entropy alloy coatings, comprising a single solid solution, were successfully obtained by electro-deposition. The microstructure, microhardness, wear properties and corrosion behaviors of both coatings were investigated. The results revealed that both coatings consisted of amorphous phases and the component elements existed as metals and their oxides. Compared with the FeCoNiCr coating, the FeCoNiCrW coating exhibited superior mechanical properties attributed to solution strengthening. Specifically, the microhardness of the FeCoNiCrW coating was 35.9 % higher, and the width of the worn tracks was 8.3 % smaller than those of the FeCoNiCr coating. However, the FeCoNiCrW coating showed more serious adhesive wear than that of FeCoNiCr coating due to its thinner coating which was worn out during wear. The FeCoNiCrW coating has the highest corrosion resistance and the lowest corrosion rate compared to 304 stainless steel and FeCoNiCr coating in 3.5 % NaCl solution, attributed to the formation of a highly stable and resistant passive film.</p></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"175 ","pages":"Article 108492"},"PeriodicalIF":4.3,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241826","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

Microstructure evolution and its effect on high-temperature compressive properties of directionally solidified Ti-44.5Al-3Nb-0.6Si-0.2C alloy by electromagnetic confinement after heat treatment 热处理后电磁约束定向凝固 Ti-44.5Al-3Nb-0.6Si-0.2C 合金的微观结构演变及其对高温抗压性能的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-09-15 DOI: 10.1016/j.intermet.2024.108491

Jiajun Zhao, Jun Shen, Shaokai Zheng, Jiaxin Li, Wei Wang, Xiaoyu Gao

{"title":"Microstructure evolution and its effect on high-temperature compressive properties of directionally solidified Ti-44.5Al-3Nb-0.6Si-0.2C alloy by electromagnetic confinement after heat treatment","authors":"Jiajun Zhao, Jun Shen, Shaokai Zheng, Jiaxin Li, Wei Wang, Xiaoyu Gao","doi":"10.1016/j.intermet.2024.108491","DOIUrl":"10.1016/j.intermet.2024.108491","url":null,"abstract":"<div><p>To regulate the microstructure of directionally solidified TiAl alloy and improve its service temperature and high-temperature mechanical properties, the large-size single crystal Ti-44.5Al-3Nb-0.6Si-0.2C alloy with full lamellar structure prepared by electromagnetic confinement directional solidification was heat-treated in the α single-phase region. The results show that this alloy has high stability and no recrystallization occurs at 1340 °C for 30 min. The (α<sub>2</sub>+γ) lamellar structure formed during the subsequent cooling process is consistent with the orientation of the original as-cast state, and the refinement effect is very significant. The thickness of the α<sub>2</sub> and the γ phases is 1/3 and 1/10 of the original structure, respectively. The dislocation strengthening and the interface strengthening are enhanced with the increase of the dislocation density and the number of α<sub>2</sub>/γ phase boundaries in the refined lamellar structure after heat treatment, thus resulting in a substantial increase of compressive strength at 1000 °C. The corresponding compressive peak strength at 1000 °C is 2.6 times higher than that of the as-cast alloy, reaching 709 MPa. This exceeds almost all the TiAl alloys under the same conditions reported so far. This research is expected to increase the service temperature of TiAl alloy to 1000 °C, thereby replacing more Ni-based superalloy components and promoting the lightweight development of aero engines.</p></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"175 ","pages":"Article 108491"},"PeriodicalIF":4.3,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142233794","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

Space group prediction of complex alloy systems by product-based neural networks 基于产品的神经网络预测复杂合金系统的空间群

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-09-12 DOI: 10.1016/j.intermet.2024.108489

Dingqi Zhao , Junwei Qiao

{"title":"Space group prediction of complex alloy systems by product-based neural networks","authors":"Dingqi Zhao , Junwei Qiao","doi":"10.1016/j.intermet.2024.108489","DOIUrl":"10.1016/j.intermet.2024.108489","url":null,"abstract":"<div><p>Complex alloy systems exhibit some unique properties, many of which are attributed to ordering phenomena. At the atomic scale, this phenomenon refers to the occupancy probability of particles at the lattice sites. From the perspective of symmetry, it corresponds to different space groups. This study uses several machine learning algorithms to predict some common space groups of complex alloy systems. Under a large data set and a difficult classification task, the relevant models achieved excellent results on the test set. In the traditional support vector machine algorithm model, the prediction can reach the first-class level. Further, through the Product-based Neural Networks method under the wide and deep framework, the bottleneck of the traditional algorithm is broken through, and the prediction ability of the model is further improved. The average Area under curve value of the model can reach 99 %, and the prediction ability of multiple space groups has been improved. This study can not only provide more ideas for cross-scale modeling of complex systems, but the related models can also provide guidance for specific alloy design.</p></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"175 ","pages":"Article 108489"},"PeriodicalIF":4.3,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142169490","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

Microstructure evolution and magnetic characteristics of a novel high entropy alloy produced by mechanical alloying and spark plasma sintering 通过机械合金化和火花等离子烧结生产的新型高熵合金的微观结构演变和磁性特征

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-09-12 DOI: 10.1016/j.intermet.2024.108488

Pradip Kumar Verma, Alok Singh, Akshay Kumar

引用次数: 0

Effects of Co/Ni ratio on microstructure and mechanical properties of as-cast Cr-Fe-Ni-Co-Al-Si-Ti-Cu high entropy alloys 钴/镍比对铸态铬-镍-钴-铝-硅-钛-铜高熵合金微观结构和机械性能的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-09-12 DOI: 10.1016/j.intermet.2024.108490

Zijian Wang, Guangzeng Zhang, Shuai Hu, Yufan Zang, Shaojie Wu, Yongfu Cai, Tan Wang, Fushan Li, Ran Wei, Shaokang Guan, Chen Chen

{"title":"Effects of Co/Ni ratio on microstructure and mechanical properties of as-cast Cr-Fe-Ni-Co-Al-Si-Ti-Cu high entropy alloys","authors":"Zijian Wang, Guangzeng Zhang, Shuai Hu, Yufan Zang, Shaojie Wu, Yongfu Cai, Tan Wang, Fushan Li, Ran Wei, Shaokang Guan, Chen Chen","doi":"10.1016/j.intermet.2024.108490","DOIUrl":"10.1016/j.intermet.2024.108490","url":null,"abstract":"<div><p>In this paper, partial replacement of Ni for Co was adopted in FCC + BCC heterostructure as-cast CrFeNi<sub>1-x</sub>Co<sub>x</sub>Al<sub>0.28</sub>Si<sub>0.09</sub>Ti<sub>0.02</sub>Cu<sub>0.01</sub> high entropy alloys (HEAs), and the modification in microstructure and mechanical properties of these alloys with the increase in the Co/Ni ratio has been systematically investigated. It was observed that all these designed HEAs consist of FCC sideplates with a surrounding BCC phase, as well as well-dispersed B2 phase in as-cast state. Additionally, higher Co/Ni ratio leads to a larger proportion of BCC phase, which has following impacts on the mechanical properties of this series of HEAs: when such ratio begins to increase, it has obvious enhancement in strength and gradual decrease in plasticity; when it reaches 0.15/0.85, it has high strength of ∼1.4 GPa and good plasticity of >10 %. While further enhancing Co/Ni ratio leads to significant connection of BCC phase, resulting in drastic increase in brittleness. The detailed mechanism for such phenomenon has been discussed in detail. This study provides a novel route on improving the comprehensive mechanical properties of this series of as-cast HEAs.</p></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"175 ","pages":"Article 108490"},"PeriodicalIF":4.3,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142173433","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

Relationship between the entropy of mixing, excess entropy and the shear viscosity of metallic glasses near the glass transition 接近玻璃化转变的金属玻璃的混合熵、过量熵和剪切粘度之间的关系

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-09-11 DOI: 10.1016/j.intermet.2024.108478

A.S. Makarov , J.B. Cui , J.C. Qiao , G.V. Afonin , N.P. Kobelev , V.A. Khonik

引用次数: 0

Temperature-dependent deformation mechanisms of γ′ phases in a newly developed NiCoCr-based superalloy 新开发的镍钴铬基超级合金中γ′相随温度变化的变形机制

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-09-11 DOI: 10.1016/j.intermet.2024.108481

Zhongfeng Chen , Anping Dong , Zhengye Zhang , Baode Sun , Yunwei Pan

{"title":"Temperature-dependent deformation mechanisms of γ′ phases in a newly developed NiCoCr-based superalloy","authors":"Zhongfeng Chen , Anping Dong , Zhengye Zhang , Baode Sun , Yunwei Pan","doi":"10.1016/j.intermet.2024.108481","DOIUrl":"10.1016/j.intermet.2024.108481","url":null,"abstract":"<div><p>The γ′-strengthened NiCoCr-based superalloys are extensively used in aerospace, energy, and chemical industries. This work focuses on tensile properties and evolution of deformation mechanism in a newly developed NiCoCr-based superalloy, designated K439B, at temperatures ranging from 25 °C to 1000 °C. The results demonstrate that the deformation mechanisms of this alloy are temperature-dependent. Slip bands and strongly-coupled dislocation pairs shear γ′ precipitates at 25 °C, resulting in high yield strength and work hardening rate. At 600 °C and 700 °C, the Lomer-Cottrell (L-C) locks are observed, and stacking faults shearing γ′ precipitates become the primary deformation mechanism. At temperatures reaching 800 °C, the yield strength exhibits an anomalous increase originating from the formation of Kear-Wilsdorf (K-W) locks. When the temperature exceeds 800 °C, the primary deformation mechanism is transformed into dislocations bypassing γ′ through the Orowan mechanism. The present study elucidates the deformation mechanism of this novel designed superalloy, thereby furnishing a theoretical foundation for the further development of the alloy system.</p></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"175 ","pages":"Article 108481"},"PeriodicalIF":4.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142169489","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