Intermetallics最新文献_第6页

On the glass formation of Pd-Ni-S metallic glass system: A fast differential scanning calorimetry study Pd-Ni-S金属玻璃体系的玻璃化：快速差示扫描量热法研究

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-10 DOI: 10.1016/j.intermet.2025.108870

Yi-Fan Gao , Hao-Ran Jiang , Hao Xu , Lu Cao , Yan-Dong Jia , Hai-Chao Sun , Wen-Jun Zhao , Da Li , Peng-fei Cheng , Gang Wang

{"title":"On the glass formation of Pd-Ni-S metallic glass system: A fast differential scanning calorimetry study","authors":"Yi-Fan Gao , Hao-Ran Jiang , Hao Xu , Lu Cao , Yan-Dong Jia , Hai-Chao Sun , Wen-Jun Zhao , Da Li , Peng-fei Cheng , Gang Wang","doi":"10.1016/j.intermet.2025.108870","DOIUrl":"10.1016/j.intermet.2025.108870","url":null,"abstract":"<div><div>This study investigates the glass formation and crystallization of the Pd<sub>38</sub>Ni<sub>38</sub>S<sub>24</sub> metallic glass-forming alloy using fast differential scanning calorimetry (FDSC) and conventional DSC. The high upper limit of the measuring temperature and ultrahigh scanning rates of the chip-based DSC enable <em>in-situ</em> melting and vitrification of the sample, providing a valuable opportunity to investigate the crystallization kinetics, even at the tip of the crystallization nose. By varying cooling rate, the critical cooling rate required to avoid crystallization is determined to be approximately 2,300 K/s. Calorimetric analyses reveal that the Pd-Ni-S alloy exhibits fragile liquid dynamics (<em>D</em>∗ = 8.5, <em>m</em> = 85.8) and a large driving force for crystallization, which are detrimental for glass formation. However, Johnson-Mehl-Avrami-Kolmogorov kinetics analyses of the constructed time-temperature-transformation diagram, based on classical nucleation theory, reveal a high interfacial energy of 0.096 J/m<sup>2</sup> between the liquid and crystal phases. This high interfacial energy likely compensates for the detrimental effect of large driving force and fragile liquid behavior, thereby leading to bulk glass formation in the Pd-Ni-S system. Overall, this work highlights the essential role of interfacial energy in glass formation and demonstrates the utility of FDSC in studying crystallization kinetics.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108870"},"PeriodicalIF":4.3,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254379","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 of structural disorder and stability of supercooled liquid state with glass-forming ability of metallic glasses 金属玻璃结构失序和过冷液态稳定性与玻璃成形能力的关系

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-10 DOI: 10.1016/j.intermet.2025.108858

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

{"title":"Relationship of structural disorder and stability of supercooled liquid state with glass-forming ability of metallic glasses","authors":"J.B. Cui , R.A. Konchakov , G.V. Afonin , A.S. Makarov , G.J. Lyu , J.C. Qiao , N.P. Kobelev , V.A. Khonik","doi":"10.1016/j.intermet.2025.108858","DOIUrl":"10.1016/j.intermet.2025.108858","url":null,"abstract":"<div><div>We performed calorimetric studies of 26 metallic glasses and calculated the excess entropy and excess enthalpy with respect to their counterpart crystals. On this basis, we introduced a dimensionless entropy-based parameter <span><math><msub><mrow><mi>σ</mi></mrow><mrow><mi>s</mi><mi>c</mi><mi>l</mi></mrow></msub></math></span>, which characterizes structural disordering and stability of the supercooled liquid state upon heating. A very good correlation of <span><math><msub><mrow><mi>σ</mi></mrow><mrow><mi>s</mi><mi>c</mi><mi>l</mi></mrow></msub></math></span> with literature data on the critical cooling rate <span><math><msub><mrow><mi>R</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> and critical diameter <span><math><msub><mrow><mi>D</mi></mrow><mrow><mi>m</mi><mi>a</mi><mi>x</mi></mrow></msub></math></span> of metallic glasses is shown. We also introduced another dimensionless parameter <span><math><msub><mrow><mi>η</mi></mrow><mrow><mi>s</mi><mi>c</mi><mi>l</mi></mrow></msub></math></span> based on the excess enthalpy of glass and showed that <span><math><msub><mrow><mi>η</mi></mrow><mrow><mi>s</mi><mi>c</mi><mi>l</mi></mrow></msub></math></span> provides equally good correlation with <span><math><msub><mrow><mi>R</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> and <span><math><msub><mrow><mi>D</mi></mrow><mrow><mi>m</mi><mi>a</mi><mi>x</mi></mrow></msub></math></span>. Possible relationship of structural disordering and glass-forming ability in the supercooled liquid range with the defect structure of glass is discussed. The obtained results provide a new window for the understanding of the glass-forming ability of metallic glasses.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108858"},"PeriodicalIF":4.3,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254378","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

V content modulates plastic deformation in Ti2Zr0.75NbVx medium-entropy alloys via lattice spacing, grain size, and dislocation synergy V含量通过晶格间距、晶粒尺寸和位错协同作用调节Ti2Zr0.75NbVx中熵合金的塑性变形

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-07 DOI: 10.1016/j.intermet.2025.108867

Xinlong Zhang , Zixian Xiong , Zhiyu Feng , Bingzhao Wu , Chunyu Zhao , Lei Zhang

{"title":"V content modulates plastic deformation in Ti2Zr0.75NbVx medium-entropy alloys via lattice spacing, grain size, and dislocation synergy","authors":"Xinlong Zhang , Zixian Xiong , Zhiyu Feng , Bingzhao Wu , Chunyu Zhao , Lei Zhang","doi":"10.1016/j.intermet.2025.108867","DOIUrl":"10.1016/j.intermet.2025.108867","url":null,"abstract":"<div><div>In this study, Ti<sub>2</sub>Zr<sub>0.75</sub>NbV<sub>x</sub> (x = 0.25, 0.5, 0.75, 1) lightweight medium-entropy alloys (LMEAs) were prepared via vacuum arc melting, and the influence of V content on the microstructure and mechanical properties was systematically investigated. The results show that with increasing V content, the lattice spacing and grain size gradually decrease, while the dislocation density and alignment are significantly enhanced. Among them, the V1 alloy, with the smallest lattice spacing and grain size (191.105 μm), exhibits the highest plasticity (16.8 % elongation). Molecular dynamics simulations further reveal that alloys with smaller lattice spacing possess lower dislocation formation energy, which significantly promotes dislocation nucleation and slip, thereby enhancing plastic deformation capability. Additionally, the formation of high-density parallel dislocation bundles optimizes stress distribution, delays local stress concentration and crack initiation, and further improves the alloy's plasticity. These findings provide critical theoretical insights for the design of high-performance lightweight alloys and lay a foundation for developing novel alloy materials with both high strength and high ductility.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108867"},"PeriodicalIF":4.3,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144231259","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

Significant strength improvement in dissimilar TiAl/Ti2AlNb joints by pulsed-current diffusion welding with Ti-6Al-4V Interlayer: Multifaceted strengthening mechanisms and high-temperature performance Ti-6Al-4V夹层脉冲扩散焊对异种TiAl/Ti2AlNb接头强度的显著提高：多方面强化机制和高温性能

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-07 DOI: 10.1016/j.intermet.2025.108869

Jiafeng Fan, Xiaoqiang Li, Qi Jiang, Penghui Tu, Haoxi Zhang, Xincheng Rong, Wenjie Jian, Shengguan Qu, Chao Yang

{"title":"Significant strength improvement in dissimilar TiAl/Ti2AlNb joints by pulsed-current diffusion welding with Ti-6Al-4V Interlayer: Multifaceted strengthening mechanisms and high-temperature performance","authors":"Jiafeng Fan, Xiaoqiang Li, Qi Jiang, Penghui Tu, Haoxi Zhang, Xincheng Rong, Wenjie Jian, Shengguan Qu, Chao Yang","doi":"10.1016/j.intermet.2025.108869","DOIUrl":"10.1016/j.intermet.2025.108869","url":null,"abstract":"<div><div>The development of high-strength TiAl/Ti<sub>2</sub>AlNb joints represents a pivotal and challenging research frontier in the fabrication of novel lightweight, high-temperature-resistant turbine components. In this study, we employed Ti-6Al-4V foils as an interlayer for the pulsed-current diffusion bonding (PCDB) of dissimilar TiAl/Ti<sub>2</sub>AlNb joints, a strategy that yielded remarkable results. The tensile strengths of the newly-developed joints at both room temperature and elevated temperatures showed substantial improvements compared to previously reported TiAl/Ti<sub>2</sub>AlNb joints. Specifically, the optimal PCDB joint exhibits a room-temperature strength of 607.8 MPa and a high-temperature strength of 527.9 MPa at 700 °C. The interfacial microstructure of this high-strength joint has unique structural features. The interlayer consists of an island-distributed α<sub>p</sub> phase and a lamellar α+β structure, while the diffusion bonding layers (DBLs) on both sides are respectively composed of the bilayered α<sub>2</sub>+α phases and the β phase strengthened by acicular α<sub>2</sub>. The strengthening mechanisms of the joints are multifaceted. They encompass solid-solution strengthening and second-phase strengthening of the interfacial microstructure, optimization of the phase composition within the interface. The reduction of thermal stress caused by the addition of the interlayer is also considered a reason for the improvement of high-temperature strength. This research not only furnishes insights into the design and manufacturing of high-performance TiAl/Ti<sub>2</sub>AlNb joints but also serves as a reference for their more extensive applications in cutting-edge aerospace and high-temperature engineering domains.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108869"},"PeriodicalIF":4.3,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144231947","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

A novel CoCrNiAl duplex phase high entropy alloy featuring body-centered tetragonal structure 一种具有体心四方结构的新型共nial双相高熵合金

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-07 DOI: 10.1016/j.intermet.2025.108868

Ning Xu , Dongpo Xuan , Han Guo , Yubo Huang , Xuming Liu , Shilei Li , Yan-dong Wang , Junsheng Wang

引用次数: 0

Effects of Cr-to-Al ratios on the phase equilibria, microstructure and competing oxide growth of CoNiCrAl bond coat alloys at 1100 °C 1100℃时cr - al比对CoNiCrAl结合层合金相平衡、显微组织和竞争氧化物生长的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-06 DOI: 10.1016/j.intermet.2025.108866

H. Chen, Y. Zong

{"title":"Effects of Cr-to-Al ratios on the phase equilibria, microstructure and competing oxide growth of CoNiCrAl bond coat alloys at 1100 °C","authors":"H. Chen, Y. Zong","doi":"10.1016/j.intermet.2025.108866","DOIUrl":"10.1016/j.intermet.2025.108866","url":null,"abstract":"<div><div>This paper studied the effects of Cr-to-Al ratios on the phase equilibria, microstructure and high temperature oxidation behaviour of CoNiCrAl alloys at 1100 °C. As-cast CoNiCrAl alloys at five different Cr-to-Al ratios were prepared by vacuum arc melting and were isothermally oxidised in air at 1100 °C for periods up to 100 h. Prior to oxidation, an initial vacuum heat treatment was conducted to obtain homogeneous phase distributions from as-cast conditions. The phase distribution was calculated by Thermo-Calc and the microstructure evolution before and after oxidation were analysed by X-ray diffractometry (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). It was shown that the CoNiCrAl alloys exhibited a predominant β-NiAl phase structure at a low Cr-to-Al ratio of 0.3, followed by a γ+β two-phase structure at intermediate Cr-to-Al ratios of 0.8 and 1.3, and eventually became a single γ phase structure at high Cr-to-Al ratios of 1.8 and 2.8. At the early stage of oxidation, it was found that Al<sub>2</sub>O<sub>3</sub> was formed at low and intermediate Cr-to-Al ratios (0.3–1.3) when the β-NiAl phase was dominant. A mixture of Cr<sub>2</sub>O<sub>3</sub> and Al<sub>2</sub>O<sub>3</sub> was mainly observed at high Cr-to-Al ratios (1.8–2.8), which was due to that insufficient Al content at high Cr-to-Al ratios failed to facilitate the continuous growth of Al<sub>2</sub>O<sub>3</sub> and high Cr content allowed the growth of Cr<sub>2</sub>O<sub>3</sub> at the surface. Furthermore, the formation of less protective Cr<sub>2</sub>O<sub>3</sub> and limited Al content resulted in significant internal oxidation and nitridation of CoNiCrAl alloys at high Cr-to-Al ratios.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108866"},"PeriodicalIF":4.3,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144222081","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 multi‒directional forging on the evolution of intermetallic precipitates and mechanical properties in novel light refractory high-entropy alloys 多向锻造对新型轻质难熔高熵合金金属间析出物演化及力学性能的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-05 DOI: 10.1016/j.intermet.2025.108864

Wei Zhang , Yizhi Zhang , Xinxin Liu , Ran Li , Yalin Zou , Shouzhen Cao , Yi Jia , Yaxing Liu , Jianchao Han

{"title":"Effect of multi‒directional forging on the evolution of intermetallic precipitates and mechanical properties in novel light refractory high-entropy alloys","authors":"Wei Zhang , Yizhi Zhang , Xinxin Liu , Ran Li , Yalin Zou , Shouzhen Cao , Yi Jia , Yaxing Liu , Jianchao Han","doi":"10.1016/j.intermet.2025.108864","DOIUrl":"10.1016/j.intermet.2025.108864","url":null,"abstract":"<div><div>The mechanical properties of refractory high‒entropy alloys (RHEAs) are influenced by the types and concentrations of the constituent elements and significantly influenced by the precipitation behavior. In this study, the Al<sub>20</sub>Nb<sub>14</sub>Ti<sub>34</sub>Zr<sub>29</sub>Cr<sub>4</sub> RHEA was designed to investigate the impact of precipitation on its microstructure and properties. The density of the alloy was only 5.53 g/cm<sup>3</sup>. Significant amounts of the Al<sub>3</sub>Zr<sub>5</sub> phase and C14 Laves phase precipitated following prolonged annealing treatment. The evolution of the microstructure of the alloy was investigated through multi‒directional forging at temperatures of 1000 °C and 1200 °C. High‒temperature forging causes the dissolution of the Al<sub>3</sub>Zr<sub>5</sub> phase, and greater dissolution occurs at elevated temperatures. Additionally, during high‒temperature forging, dissolution and subsequent reprecipitation of the C14 Laves phase occur. Lower forging temperatures promote increased reprecipitation of the C14 Laves phase. The alloy forged at 1000 °C exhibited an exceptional yield strength of 1870.1 MPa, accompanied by a specific yield strength of 338.2 N∙m/kg and a compressive limit deformation of 20.9 %. This remarkable performance can be attributed to the changes in the shape size and distribution of the precipitated phase during the forging process at 1000 °C, as well as the grain refinement caused by recrystallization. These factors work together to improve the strength and plasticity of the alloy.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108864"},"PeriodicalIF":4.3,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213487","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 manufacturing method on the properties of bulk amorphous Zr35Ti30Be27.5Cu7.5 alloy 制备方法对非晶Zr35Ti30Be27.5Cu7.5合金性能的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-05 DOI: 10.1016/j.intermet.2025.108859

Aleksey N. Suchkov , Ekaterina A. Bazdnikina , Julia V. Bondareva , Denis G. Firsov , Stanislav A. Evlashin , Pavel V. Morokhov , Dmitriy S. Gorbunov , Ksenia A. Popova , Victor N. Petrovskiy , Ivan R. Ovsyankin , Andrey V. Samokhin , Andrey A. Fadeev , Alexandr M. Pesin , Denis O. Pustovoitov , Ilya V. Kozlov , Oleg N. Sevryukov

{"title":"Impact of manufacturing method on the properties of bulk amorphous Zr35Ti30Be27.5Cu7.5 alloy","authors":"Aleksey N. Suchkov , Ekaterina A. Bazdnikina , Julia V. Bondareva , Denis G. Firsov , Stanislav A. Evlashin , Pavel V. Morokhov , Dmitriy S. Gorbunov , Ksenia A. Popova , Victor N. Petrovskiy , Ivan R. Ovsyankin , Andrey V. Samokhin , Andrey A. Fadeev , Alexandr M. Pesin , Denis O. Pustovoitov , Ilya V. Kozlov , Oleg N. Sevryukov","doi":"10.1016/j.intermet.2025.108859","DOIUrl":"10.1016/j.intermet.2025.108859","url":null,"abstract":"<div><div>Zirconium-based bulk metallic glasses, such as Zr<sub>35</sub>Ti<sub>30</sub>Be<sub>27</sub>.<sub>5</sub>Cu<sub>7</sub>.<sub>5</sub>, exhibit outstanding strength, elasticity, and corrosion resistance, making them highly attractive for advanced engineering applications. However, producing bulk amorphous components remains challenging due to the high cooling rates required to prevent crystallization. In this study, Zr<sub>35</sub>Ti<sub>30</sub>Be<sub>27</sub>.<sub>5</sub>Cu<sub>7</sub>.<sub>5</sub> alloys were fabricated using casting, joining sheet materials, direct energy deposition, and powder bed fusion. Comparative analysis of their structure, phase composition, density, and mechanical properties revealed the main features of the methods used. Castings suffer from structural inhomogeneities and lower density due to insufficient cooling in the ingot center, as well as defects. Joining sheet materials produces small, homogeneous amorphous regions (<5 mm) but faces challenges regarding density and scalability due to temperature control issues. Direct energy deposition enables the creation of larger compacts (>10 mm) with high amorphism and density; however, non-uniform crystallite distribution reduces mechanical properties. Powder bed fusion emerges as the optimal technology for producing high-quality, high-strength, and high-density Zr-based bulk metallic glass components, outperforming other methods in both material properties and manufacturing precision. Optimal conditions were identified, providing a pathway for scalable manufacturing of Zr-based bulk amorphous metallic alloys with superior properties.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108859"},"PeriodicalIF":4.3,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213266","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

Enhanced strength-ductility synergy in CrFe2Ni2Ti0.2 high-entropy alloys by metalloid element Si and solution-aging treatment 类金属元素Si和固溶时效处理增强CrFe2Ni2Ti0.2高熵合金的强度-塑性协同效应

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-03 DOI: 10.1016/j.intermet.2025.108865

Gaoxiang Wei , Zhiqin Wen , Zhenyu Wu , Jiyuan Huang , Suzhen Kang , Chaobai Zhang , Yuhong Zhao

{"title":"Enhanced strength-ductility synergy in CrFe2Ni2Ti0.2 high-entropy alloys by metalloid element Si and solution-aging treatment","authors":"Gaoxiang Wei , Zhiqin Wen , Zhenyu Wu , Jiyuan Huang , Suzhen Kang , Chaobai Zhang , Yuhong Zhao","doi":"10.1016/j.intermet.2025.108865","DOIUrl":"10.1016/j.intermet.2025.108865","url":null,"abstract":"<div><div>Solution-aging treatment is a critical approach for optimizing the mechanical properties of HEAs. In this study, CrFe<sub>2</sub>Ni<sub>2</sub>Ti<sub>0.2</sub>Si<sub><em>x</em></sub> (<em>x</em> = 0, 0.125, 0.25, 0.375, 0.5, 0.625, denoted as Si<em>x</em>) HEAs are prepared by vacuum arc melting, and all the HEAs are subjected to aging treatment at 800 °C according to phase diagram calculations (CALPHAD). The phase composition, microstructure and mechanical properties of the alloys are systematically investigated. CALPHAD predictions and experimental results reveal that Si addition (<em>x</em> = 0.325, 0.5, 0.625) promotes the formation of a dual-phase structure comprising an FCC and <em>G</em>-phase (Ni<sub>16</sub>Ti<sub>6</sub>Si<sub>7</sub>). And the two-phase hybrid structure of the alloys exhibits a labyrinth-like shape. Particularly, the Si0.375 alloys exhibit optimal strength-ductility synergy among the considered alloys, achieving an ultimate strength of 1325.2 MPa while maintaining a ductility of 37.3 %. This represents a 67 % improvement in yield strength compared to the as-cast alloys. The fracture surface of the Si0.375 alloys exhibit characteristic dimples of varying sizes, indicating a predominantly ductile fracture mechanism. Moreover, heat treatment significantly increases the <em>G</em>-phase volume fraction, thereby enhancing both grain boundary and precipitation strengthening effects.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"184 ","pages":"Article 108865"},"PeriodicalIF":4.3,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144205009","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

Decelerated lead-bismuth eutectic corrosion of FeCrAlTiMo coating by in situ proton irradiation 原位质子辐照对FeCrAlTiMo涂层铅铋共晶减速腐蚀的研究

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-03 DOI: 10.1016/j.intermet.2025.108849

Jian Yang, Jijun Yang

引用次数: 0