Intermetallics最新文献

Microstructure evolution and tensile properties behavior during aging temperature of CoCrFeNi-based high entropy alloys CoCrFeNi 基高熵合金在老化温度过程中的显微结构演变和拉伸性能行为

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-11-16 DOI: 10.1016/j.intermet.2024.108560

Liming Fu , Zhian Song , Qigui Yang , Te Zhu , Rui Ma , Mingpan Wan , Peng Zhang , Runsheng Yu , Xingzhong Cao

{"title":"Microstructure evolution and tensile properties behavior during aging temperature of CoCrFeNi-based high entropy alloys","authors":"Liming Fu , Zhian Song , Qigui Yang , Te Zhu , Rui Ma , Mingpan Wan , Peng Zhang , Runsheng Yu , Xingzhong Cao","doi":"10.1016/j.intermet.2024.108560","DOIUrl":"10.1016/j.intermet.2024.108560","url":null,"abstract":"<div><div>Understanding the strengthening mechanism of high entropy alloys (HEA) is vital to improve their mechanical properties. In this study, we thoroughly investigated the strengthening effect of L1<sub>2</sub> nanoprecipitates on the mechanical properties of the face-centered cubic (FCC) CoCrFeNi HEA. The L1<sub>2</sub> nanoprecipitates were introduced by adding titanium (Ti), niobium (Nb), and aluminum (Al). Following a series of heat treatments (aged at 400 °C, 600 °C, and 800 °C for 4 h), the samples aged at 800 °C exhibited a noticeable improvement in tensile strength compared to the CoCrFeNi-based alloy, while maintaining excellent ductility (elongation greater than 29 %). This enhanced in performance is primarily attributed to the synergistic effects of multiple strengthening mechanisms, with precipitation strengthening playing a particularly prominent role (<span><math><mrow><mrow><mo>Δ</mo><msub><mi>σ</mi><mi>P</mi></msub><mo>=</mo><mn>385.6</mn><mi>M</mi><mi>P</mi><mi>a</mi></mrow><mo>)</mo></mrow></math></span>. Transmission electron microscopy (TEM) results revealed that the volume fraction of L1<sub>2</sub> precipitates reached 35 %, with sizes around 12 nm. This study provides valuable theoretical insights for optimizing the composition and processing strategies of high entropy alloys and lays a solid foundation for the development of high-performance alloys suited to complex engineering applications.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"176 ","pages":"Article 108560"},"PeriodicalIF":4.3,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659862","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

Investigation of tribological properties of heat-treated ZrNbTiVAl high entropy alloy in dry sliding conditions 热处理 ZrNbTiVAl 高熵合金在干燥滑动条件下的摩擦学特性研究

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-11-16 DOI: 10.1016/j.intermet.2024.108573

Neelima Khare , Poulami Chakraborty , Satish Chandra Mishra , Anurup Das , Praveen Kumar Limaye , Mahender Dev , Raghvendra Tewari

{"title":"Investigation of tribological properties of heat-treated ZrNbTiVAl high entropy alloy in dry sliding conditions","authors":"Neelima Khare , Poulami Chakraborty , Satish Chandra Mishra , Anurup Das , Praveen Kumar Limaye , Mahender Dev , Raghvendra Tewari","doi":"10.1016/j.intermet.2024.108573","DOIUrl":"10.1016/j.intermet.2024.108573","url":null,"abstract":"<div><div>This study explored the relationship between tribological performance and microstructural changes induced by heat treatment in a newly developed ZrNbTiVAl high-entropy alloy (HEA). The alloy was evaluated in its as-cast state and after heat treatments at 950 °C for 15, 20, and 25 h, with dry sliding experiments conducted against an alumina ball counterface. Advanced analytical techniques, including 3D optical profilometry, nanohardness testing, field emission scanning electron microscopy (FESEM), energy-dispersive spectroscopy (EDS), and Micro-Raman spectroscopy, were employed for comprehensive surface analysis and to investigate oxide layer formation on the worn surfaces.</div><div>The study reveals a nuanced relationship between heat treatment duration, oxide layer formation, and frictional behavior in the ZrNbTiVAl high-entropy alloy (HEA). Increasing the heat treatment duration at 950 °C results in higher hardness (H) and a reduction in the modulus of elasticity (E) of the ZrNbTiVAl high-entropy alloy (HEA). Notably, wear rate and friction were lower in the as-cast and 15 h heat-treated conditions, despite their lower H/E and H³/E<sup>2</sup> values compared to the 20 h and 25 h heat-treated states. Additionally, the wear mechanisms shift significantly, from mild adhesive/oxidative wear in the as-cast and 15 h conditions to severe adhesive/oxidative wear in the 20 h and 25 h conditions. This improved performance in the as-cast and 15 h conditions is attributed to the enrichment of Ti and V—elements recognized for their solid lubrication properties—and a reduced presence of Al-Zr intermetallics, which helps to minimize the formation of hard wear debris during dry sliding. These findings underscore the importance of optimizing heat treatment parameters to achieve superior tribological performance.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"176 ","pages":"Article 108573"},"PeriodicalIF":4.3,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659829","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 diversity of evolution behavior between stoichiometric and non-stoichiometric AlTM intermetallics in Mg melt 镁熔体中化学计量和非化学计量 AlTM 金属间化合物演化行为的多样性

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-11-15 DOI: 10.1016/j.intermet.2024.108574

Hongfu Su, Jingyi Hu, Mengyu Li, Jingbin Liu, Tong Gao, Xiangfa Liu

{"title":"The diversity of evolution behavior between stoichiometric and non-stoichiometric AlTM intermetallics in Mg melt","authors":"Hongfu Su, Jingyi Hu, Mengyu Li, Jingbin Liu, Tong Gao, Xiangfa Liu","doi":"10.1016/j.intermet.2024.108574","DOIUrl":"10.1016/j.intermet.2024.108574","url":null,"abstract":"<div><div>In this study, Al-5Ti, Al-18Si-5Ti, Al-12Si-2Sc and Al-12Si-1Sc-1Zr alloys, containing the Al<sub>3</sub>Ti, Ti<sub>7</sub>Al<sub>5</sub>Si<sub>12</sub>, AlSi<sub>2</sub>Sc<sub>2</sub> and AlSi<sub>2</sub>(Sc, Zr)<sub>2</sub> particles, respectively, were introduced into a Mg melt to understand the morphological and structural evolution behaviors of AlTM intermetallic compounds. Deposition layers at the bottom of the Mg melt were obtained due to the particle settlement. Scanning electron microscope and X-ray diffraction were employed to analyze the phase morphologies and structures of the AlTM intermetallic compounds in the deposition layers. A morphological transformation, characterized by the cracking of particles into fine clusters, was observed in all these AlTM intermetallic compounds, which is promoted by the inward diffusion of Mg atoms. The phase structures of the final particles remained Al<sub>3</sub>Ti and AlSi<sub>2</sub>Sc<sub>2</sub> when Al-5Ti and Al-12Si-2Sc alloys were introduced into the Mg melt, indicating no structural evolution. However, structural evolutions were detected from Ti<sub>7</sub>Al<sub>5</sub>Si<sub>12</sub> to Ti<sub>5</sub>Si<sub>4</sub> and from AlSi<sub>2</sub>(Sc, Zr)<sub>2</sub> to SiScZr when they were introduced in the Mg melt. It is hypothesized that the crystal structure, whether stoichiometric or non-stoichiometric, is closely related to the structural evolution behavior of AlTM intermetallic compounds. This work may provide new insights into phase control by introducing one type of metal matrix master alloy into another metal melt.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"176 ","pages":"Article 108574"},"PeriodicalIF":4.3,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660106","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

Improving shape memory effect in Fe-Mn-Si-based alloys by reducing annealing twin boundaries through trace boron doping 通过掺杂微量硼减少退火孪晶边界，改善铁锰硅基合金的形状记忆效应

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-11-15 DOI: 10.1016/j.intermet.2024.108552

Guoqing Cao , Yanni Luo , Yu Fu, Qilin Wang, Huabei Peng, Yuhua Wen

引用次数: 0

Influence of ball milling on the evolution of microstructure and microtexture in hot-press sintered cobalt alloy 球磨对热压烧结钴合金微结构和微纹理演变的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-11-15 DOI: 10.1016/j.intermet.2024.108548

Vallapurapu Deva Praneeth , Manikandan R. , Pranav A.S. , Annamalai A. Raja , Muthuchamy A.

引用次数: 0

Corrosion and passivation behavior of Fe40Mn20Cr20Ni20 high-entropy alloys in artificial seawater: Effect of rare earth Ce 人工海水中 Fe40Mn20Cr20Ni20 高熵合金的腐蚀和钝化行为：稀土 Ce 的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-11-14 DOI: 10.1016/j.intermet.2024.108554

Di Wang , Aidong Lan , Huijun Yang , Xi Jin , Junwei Qiao

引用次数: 0

Microstructure, mechanical properties and oxidation resistance of β-solidifying γ-TiAl based alloys β-凝固γ-TiAl基合金的微观结构、力学性能和抗氧化性

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-11-13 DOI: 10.1016/j.intermet.2024.108556

V.M. Imayev, D.M. Trofimov, R.M. Imayev

{"title":"Microstructure, mechanical properties and oxidation resistance of β-solidifying γ-TiAl based alloys","authors":"V.M. Imayev, D.M. Trofimov, R.M. Imayev","doi":"10.1016/j.intermet.2024.108556","DOIUrl":"10.1016/j.intermet.2024.108556","url":null,"abstract":"<div><div>In the present work, two β-solidifying γ-TiAl based intermetallic alloys, Ti-43.5Al-4Nb-1Mo-0.1B (TNM) and Ti-43.5Al-6(Nb,Zr,Hf)-0.1B (TNZ) (at.%), have been comparatively studied. Two microstructural conditions per alloy, near duplex and near lamellar, were obtained in the alloys by isothermal upset forging and two-stage heat treatments. Microstructure examination revealed three phases (γ, α<sub>2</sub> and β(β<sub>o</sub>)) in both alloys but in the TNZ alloy the β(β<sub>o</sub>) phase content was less than 1 vol% in contrast to the TNM alloy, in which the β(β<sub>o</sub>) phase content was varied within 4–8 vol%. The near duplex conditions of the alloys were similar, whereas a coarser microstructure was obtained in the TNZ alloy with near lamellar structure. The tensile and creep tests revealed that the brittle-ductile transition in the TNZ alloy occurred at higher temperatures that correlated with an appreciably higher creep resistance of the TNZ alloy as compared to the TNM alloy. In the near lamellar condition, the TNZ alloy showed superior strength at 900–1000 °C as compared to known γ-TiAl alloys (e.g. UTS = 554 MPa at 950 °C). The oxidation resistance of the alloys in the near lamellar conditions was evaluated during exposure at 800 °C for 1000 h. The TNZ alloy showed higher oxidation resistance and thus generally appreciably higher high-temperature capability than the TNM alloy. It has been shown that the fundamental reason for different temperatures of the brittle-ductile transition and different creep and oxidation resistance of the alloys is the enhanced thermal stability of the microstructure of the TNZ alloy compared to the TNM alloy.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"176 ","pages":"Article 108556"},"PeriodicalIF":4.3,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660105","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

Asynchronous deformation behavior of precipitation-hardened high-entropy alloys shaped charge liner under explosive loading 爆炸加载下沉淀硬化高熵合金成型装药衬垫的异步变形行为

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-11-12 DOI: 10.1016/j.intermet.2024.108555

Xutao Wang , Benpeng Wang , Xudong Liu , Tianxiang Li , Hanlin Zeng , Liang Wang , Ke Jin , Yunfei Xue

{"title":"Asynchronous deformation behavior of precipitation-hardened high-entropy alloys shaped charge liner under explosive loading","authors":"Xutao Wang , Benpeng Wang , Xudong Liu , Tianxiang Li , Hanlin Zeng , Liang Wang , Ke Jin , Yunfei Xue","doi":"10.1016/j.intermet.2024.108555","DOIUrl":"10.1016/j.intermet.2024.108555","url":null,"abstract":"<div><div>Precipitation-hardened high entropy alloys (PHEAs) are promising candidates for shaped charge liners (SCLs) due to their potential in obtaining good penetration depth and diameter. Deformation mechanism under explosive is the key to guiding the alloys microstructure, property optimization and shaped charge designing. In this study, the microstructural evolution and deformation mechanism of PHEA SCLs under explosive loading were systematically investigated. Under explosive loading, both the α<sub>2</sub> and BCC matrix phases underwent dynamic recrystallization, transforming into fine equiaxed grains (∼10 μm). The BCC phase deformed earlier than the α<sub>2</sub> phase, exhibiting a clearly asynchronous deformation behavior. This demonstrates that the α<sub>2</sub> phase can effectively improve the deformation resistance upon detonation and further increase jet diameter. Moreover, the α<sub>2</sub> can be retained under explosive conditions, which enables delaying the expansion of the adiabatic shear bands and further improving the jet continuity. Our results shed lights on developing new high-performance alloys and the related microstructure optimization for engineering applications in SCLs.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"176 ","pages":"Article 108555"},"PeriodicalIF":4.3,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659864","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

Tailoring the magnetic properties of Ce-Fe-B alloys by controlling the CeFe2 paramagnetic phase 通过控制 CeFe2 顺磁相定制 Ce-Fe-B 合金的磁性能

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-11-12 DOI: 10.1016/j.intermet.2024.108571

Yongqiang Deng , Sajjad Ur Rehman , Zhihao Liu , Haihua Liu , Shuwei Zhong , Xiaoqiang Yu , Jiajie Li , Munan Yang

{"title":"Tailoring the magnetic properties of Ce-Fe-B alloys by controlling the CeFe2 paramagnetic phase","authors":"Yongqiang Deng , Sajjad Ur Rehman , Zhihao Liu , Haihua Liu , Shuwei Zhong , Xiaoqiang Yu , Jiajie Li , Munan Yang","doi":"10.1016/j.intermet.2024.108571","DOIUrl":"10.1016/j.intermet.2024.108571","url":null,"abstract":"<div><div>The CeFe<sub>2</sub> paramagnetic phase consumes a large amount of Ce in the Ce-Fe-B, deteriorating the magnetic properties of the alloys. Due to the significant consumption of Ce element in the CeFe<sub>2</sub> phase, the content of Ce is maintained at a high level, i.e., up to 35–37 wt% in the Ce-Fe-B alloys. In this paper, we report the magnetic properties of Ce-Fe-B alloys by adding Ge, which suppresses the formation of the CeFe<sub>2</sub> phase. The content of Ce is reduced from 35 to 28.5 wt%, resulting in a significant reduction in the volume fraction of the CeFe<sub>2</sub> from 10.3 wt% in the Ce<sub>35</sub>Fe<sub>63.5</sub>Ge<sub>0.5</sub>B alloy to 1.6 wt% in the Ce<sub>31.1</sub>Fe<sub>67.4</sub>Ge<sub>0.5</sub>B alloy. The soft magnetic α-Fe phase is formed when the content of Ce is reduced to 29.8 and 28.5 wt%. The intrinsic coercivity of the alloys decreased from 490 kA/m in the pristine alloy to 410 kA/m in the Ce<sub>29.8</sub>Fe<sub>68.7</sub>Ge<sub>0.5</sub>B alloy. The remanence of the alloys increased from 0.46 T in the pristine alloy to 0.59 T in the Ce<sub>29.8</sub>Fe<sub>68.7</sub>Ge<sub>0.5</sub>B alloy. More strikingly, the maximum energy density, which is the figure of merit for permanent magnets, increased from 33.8 kJ/m<sup>3</sup> to 52.3 kJ/m<sup>3</sup>, showing an increment of ∼55 %. The phase constituents, microstructure, phase transition temperatures, magnetic interactions, and applicability of the alloys have been investigated in detail using XRD Rietveld refinement, transmission electron microscopy and various magnetic property measurements.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"176 ","pages":"Article 108571"},"PeriodicalIF":4.3,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660103","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

Influences of element M (M=Mo, Cu, and Al) on CoCrFeNiTi-based high entropy alloys by laser cladding under different process parameters 不同工艺参数下激光熔覆元素 M（M=钼、铜和铝）对 CoCrFeNiTi 基高熵合金的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2024-11-11 DOI: 10.1016/j.intermet.2024.108572

Guofu Lian , Jiangbin Chen , Jianghuai Yang , Meiyan Feng , Song Lan

{"title":"Influences of element M (M=Mo, Cu, and Al) on CoCrFeNiTi-based high entropy alloys by laser cladding under different process parameters","authors":"Guofu Lian , Jiangbin Chen , Jianghuai Yang , Meiyan Feng , Song Lan","doi":"10.1016/j.intermet.2024.108572","DOIUrl":"10.1016/j.intermet.2024.108572","url":null,"abstract":"<div><div>Excellent alloys were prepared to explore the effects of different additions of element M on CoCrFeNiTi-based high entropy alloys by laser cladding under different process parameters. The preset-powder method was used to prepare CoCrFeNiTi_0.5M_0.5 (M = Mo, Cu, and Al) coating in the work. The material properties of high entropy alloys were calculated based on the first principle. After that, the influence mechanism of the addition of M on the CoCrFeNiTi-based high entropy alloy was explored by experiments. The phasing standards of coatings added with M were calculated according to the first principle. It was predicted that CoCrFeNiTi_0.5Mo_0.5 coating and CoCrFeNiTi_0.5Cu_0.5 coating had high hardness and toughness, respectively. All six high-entropy alloys were stable in mechanics. The optimal process parameter coating was selected by the all-factor test based on excellent hardness and shaping quality. The results were consistent with those by theoretical calculations. The cocktail effect of high-entropy alloys was explored by analyzing the effect of different elemental additions on the overall performance of coatings. Results showed that the CoCrFeNiTi_0.5Mo_0.5 coating had high wear resistance and local elastic modulus. The friction mass loss and local elastic modulus were 0.0410 mm<sup>3</sup> and 279.0444 GPa, respectively. The CoCrFeNiTi_0.5Cu_0.5 coating had high toughness and corrosion resistance. The resilience and free corrosion potential were 81.6473 nm and −0.730 V, respectively. The CoCrFeNiTi_0.5Al_0.5 coating had good crack resistance. Plastic storage energy was 30071.5097 × 10<sup>−15</sup> J. Research results provided a theoretical basis for preparing high entropy alloy reinforced coatings by laser cladding.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"176 ","pages":"Article 108572"},"PeriodicalIF":4.3,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659863","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