Intermetallics最新文献_第4页

Growth of various in whiskers on Cr-Al-B MAB phases formed during hot-dip aluminizing and subsequent thermal diffusion treatment of Fe-Cr-B cast steel Fe-Cr-B铸钢在热浸渗铝和随后的热扩散处理过程中形成的Cr-Al-B MAB相上各种晶须的生长

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-23 DOI: 10.1016/j.intermet.2025.108891

Xianman Zhang , Ren Fu , Baichuan Liu , Zicheng Ling

{"title":"Growth of various in whiskers on Cr-Al-B MAB phases formed during hot-dip aluminizing and subsequent thermal diffusion treatment of Fe-Cr-B cast steel","authors":"Xianman Zhang , Ren Fu , Baichuan Liu , Zicheng Ling","doi":"10.1016/j.intermet.2025.108891","DOIUrl":"10.1016/j.intermet.2025.108891","url":null,"abstract":"<div><div>The synthesis of MAB phases and their solid solutions, which were candidates of precursor to prepare the MBenes with promising in energy storage and electrocatalytic applications, were generally complex. Compared with wide growth of whiskers on the MAX phases, the A-site element whiskers growth on the MAB phases were rare. Cr-Al-B MAB phase within the periodic layered structure (PLS) coating could be formed during hot-dip aluminizing (HDA) and subsequent thermal diffusion treatment (TDT) of Fe-Cr-B cast steel. Herein, the interfacial microstructures of the HDA of Fe-Cr-B cast steel in Al alloy melts containing Bi, In and Sn and subsequent TDT, especially the growth of whiskers on the whitened Cr-Al-B MAB phases, were systematically studied. The results demonstrated that, In and its combinations with Bi could partially replace the Al atoms in the Cr-Al-B MAB phase, resulting the both effects that the whitening of the Cr-Al-B MAB phases within the PLS and the spontaneous growth of whiskers with different compositions on them. However, the growth of Bi whisker could be neglected, compared with wide growth of various In whiskers. The shape of γ-In(Sn) rapid spontaneous growth in the vacuum chamber of SEM was complex and was not the prism structure of Sn whisker growth under the vacuum condition, which was related to the compositions of whiskers. This study would further enrich the theory of whisker growth on the MAB/MAX phases.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108891"},"PeriodicalIF":4.3,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144338731","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

Minimal Al promotes dual-superlattice precipitates in Ni2.1CoCrFeTa0.2 high entropy alloy with excellent tensile properties 微量Al促进了Ni2.1CoCrFeTa0.2高熵合金的双超晶格析出，具有优异的拉伸性能

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-21 DOI: 10.1016/j.intermet.2025.108888

Rongtian Cao, Jianlin Lu, Zhongsheng Yang, Songyu Wang, Lei Wang, Junjie Li, Zhijun Wang, Jincheng Wang, Feng He

{"title":"Minimal Al promotes dual-superlattice precipitates in Ni2.1CoCrFeTa0.2 high entropy alloy with excellent tensile properties","authors":"Rongtian Cao, Jianlin Lu, Zhongsheng Yang, Songyu Wang, Lei Wang, Junjie Li, Zhijun Wang, Jincheng Wang, Feng He","doi":"10.1016/j.intermet.2025.108888","DOIUrl":"10.1016/j.intermet.2025.108888","url":null,"abstract":"<div><div>L1<sub>2</sub> and D0<sub>22</sub> superlattices have shown excellent strengthening effects and good thermal stability in high entropy alloys (HEA). Cooperating these two precipitates in one alloy has been proved promising in enhancing the comprehensive properties. However, design of the dual-superlattice precipitates in HEAs is still challenging due to unexplored interactions between the L1<sub>2</sub> and D0<sub>22</sub> phases during thermal aging. Here, we showed that addition of minimal L1<sub>2</sub>-forming Al (0.5 at. %) led to L1<sub>2</sub>-D0<sub>22</sub> dual superlattice precipitates in Ni<sub>2.1</sub>CoCrFeTa<sub>0.2</sub>. Our results showed that as the content of Al increases from 0 to only 1 at. %, the dominant precipitates in Ni<sub>2.1</sub>CoCrFeTa<sub>0.2</sub> changed from single D0<sub>22</sub> phase to L1<sub>2</sub>-D0<sub>22</sub> dual phases, and finally single L1<sub>2</sub> phase. Samples were annealed at different temperatures ranging from 650 °C to 750 °C. When the temperature is higher than 700 °C, D0<sub>22</sub> phase become unstable, the dual-superlattice structure will be disrupted. Superior tensile strength of 1550 MPa and good fracture elongation of 16 % are achieved by aging the (Ni<sub>2.1</sub>CoCrFeTa<sub>0.2</sub>)<sub>99.5</sub>Al<sub>0.5</sub> HEA at 700 °C for 84 h. These insights provide guidance for the design of precipitation-hardened alloys with better mechanical properties.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108888"},"PeriodicalIF":4.3,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144330552","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

Study on microstructure evolution and strengthening mechanism of CuFeNiCoSi biphase high-entropy alloy by co-alloying of high melting point elements Mo and Nb 高熔点元素Mo和Nb共合金化CuFeNiCoSi双相高熵合金的组织演变及强化机理研究

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-21 DOI: 10.1016/j.intermet.2025.108889

Kaitian Mei , Changyuan Jia , Guan Liu , Wangqing Wu (吴旺青)

{"title":"Study on microstructure evolution and strengthening mechanism of CuFeNiCoSi biphase high-entropy alloy by co-alloying of high melting point elements Mo and Nb","authors":"Kaitian Mei , Changyuan Jia , Guan Liu , Wangqing Wu (吴旺青)","doi":"10.1016/j.intermet.2025.108889","DOIUrl":"10.1016/j.intermet.2025.108889","url":null,"abstract":"<div><div>CuFeNiCoSiMo<sub>x</sub>Nb<sub>(1-x)</sub> high entropy alloy coating (x = 0, 0.25, 0.5, 0.75, 1) was successfully prepared on P20 substrate by the laser cladding technology. The effects of x changes on microstructure, hardness, wear resistance and corrosion resistance of the coating were systematically studied. The results show that Nb tends to partition into the BCC phase, while Mo tends to partition into the FCC phase. CuFeNiCoSi coating has FCC + BCC biphase structure. When Nb element is added alone, the coating is composed of BCC + Laves phase, which is mainly precipitation strengthening and solid solution strengthening. When Mo element is added alone, the coating is composed of FCC + BCC+σ phase, and the strengthening mechanism is the same as that when Nb element is added alone. When Mo and Nb elements are added at the same time, the coating is composed of FCC + BCC + Laves phase, and the strengthening mechanism is mainly precipitation strengthening, solid solution strengthening and fine crystal strengthening. When x = 0.25, the grain size of the coating is the smallest, and the fine crystal strengthening effect is the strongest. With the increase of x, the hardness, wear resistance and corrosion resistance of the coating first increased and then decreased. When x = 0.25, the performance of the coating is the best.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108889"},"PeriodicalIF":4.3,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144330553","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

Constitutive modeling and microstructure characterization of Al-30at.%Sc intermetallic compound during high temperature deformation Al-30at的本构建模与微观组织表征。高温变形时的%Sc金属间化合物

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-21 DOI: 10.1016/j.intermet.2025.108883

Rui Xu , Xin Xu , Guofang Feng , Chaoxin Qiu , Hanxiao Chen , Chunsheng Fang , Changcai Chen , Xiaohua Luo , Shengcan Ma

{"title":"Constitutive modeling and microstructure characterization of Al-30at.%Sc intermetallic compound during high temperature deformation","authors":"Rui Xu , Xin Xu , Guofang Feng , Chaoxin Qiu , Hanxiao Chen , Chunsheng Fang , Changcai Chen , Xiaohua Luo , Shengcan Ma","doi":"10.1016/j.intermet.2025.108883","DOIUrl":"10.1016/j.intermet.2025.108883","url":null,"abstract":"<div><div>To explore the hot-deformation mechanism of Al with high-content Sc, an Al-30at.%Sc intermetallic compound is prepared <em>via</em> high-vacuum arc melting. Isothermal hot-compression (1000–1100 °C, 0.001–0.1 s<sup>−1</sup>) yield true stress-strain curves, and an Arrhenius-type constitutive equation is derived. A hot-processing map is constructed based on the dynamic material model. The physical property data of Al-30at.%Sc intermetallic compound (varying with temperature) was calculated and constructed, and successfully applied to the Deform-3D software platform in combination with its constitutive equation. Results show that the hot-deformation activation energy at the peak stress, and at a strain of 0.3 is 421.1 kJ/mol, and 431.8 kJ/mol, respectively, which produces a correlation coefficient of 0.98 between predicted and experimental true stress and the peak power-dissipation factor ∼0.58. Grain size increases with rising deformation temperature or decreasing strain rate. Nanoscale observation reveals different dislocation structures and strain-field concentration areas under various thermal-deformation conditions. Al<sub>3</sub>Sc and Al<sub>2</sub>Sc precipitated phases are formed in the Al-30at.%Sc intermetallic compound. The L1<sub>2</sub>-type ordered structure of the Al<sub>3</sub>Sc phase blocks dislocation movement, causing pile-up and complex dislocation morphologies. The elastic-modulus difference between Al<sub>2</sub>Sc and Al<sub>3</sub>Sc phases leads to uneven stress and strain-field concentration.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108883"},"PeriodicalIF":4.3,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144330551","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

Co-induced decarburization enhancing corrosion resistance and magnetic properties of Fe-based alloys during annealing 共诱导脱碳提高了铁基合金在退火过程中的耐蚀性和磁性能

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-20 DOI: 10.1016/j.intermet.2025.108886

Zhaoxuan Wang , Qi Chen , Zhigang Qi , Ziqi Song , Zheng Wang , Boxuan Cao , Shaopeng Pan , Jing Pang , Weimin Wang

{"title":"Co-induced decarburization enhancing corrosion resistance and magnetic properties of Fe-based alloys during annealing","authors":"Zhaoxuan Wang , Qi Chen , Zhigang Qi , Ziqi Song , Zheng Wang , Boxuan Cao , Shaopeng Pan , Jing Pang , Weimin Wang","doi":"10.1016/j.intermet.2025.108886","DOIUrl":"10.1016/j.intermet.2025.108886","url":null,"abstract":"<div><div>The as-spun and annealed Fe<sub>80-<em>x</em></sub>P<sub>13</sub>C<sub>7</sub>Co<sub><em>x</em></sub> glassy alloys (<em>x =</em> 0, 4 and 8) were studied by various techniques. The annealed ribbons with <em>x =</em> 0 and <em>x =</em> 4 exhibited surface layer crystallization, whereas the ribbon with <em>x =</em> 8 crystallized in the middle layer. Consequently, the amorphous phase persisted in the middle layer for <em>x</em> = 0 and <em>x</em> = 4 and in the surface layer for <em>x</em> = 8. Reducing Fe<sub>3</sub>C content, increasing Fe<sub>3</sub>P content and weakening C 1s peak with increasing <em>x</em> indicate that doping Co promoted the decarburization during annealing. The annealed ribbon with <em>x</em> = 8 exhibited a distinct passivation platform and a superior corrosion resistance due to its amorphous surface layer. Additionally, Co doping effectively compensated for or mitigated the magnetic permeability decrease caused by crystallization, allowing the annealed Fe<sub>72</sub>P<sub>13</sub>C<sub>7</sub>Co<sub>8</sub> ribbon to maintain good soft magnetic properties and ductility. This study can provide some insights for optimizing the performance of Fe-based glassy alloys and expanding their application range.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108886"},"PeriodicalIF":4.3,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144330550","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

Achieving excellent strength-ductility synergy in CoCrFeNi2Al0.3Ti0.25 high entropy alloy via analogous harmonic structure and dual-morphology L12 precipitates strengthening CoCrFeNi2Al0.3Ti0.25高熵合金通过类似谐波结构和双形态L12析出相强化实现了优异的强度-塑性协同效应

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-18 DOI: 10.1016/j.intermet.2025.108885

A.X. Li, K.W. Kang, J.S. Zhang, D. Huang, M.K. Xu, S.K. Liu, Y.T. Jiang, G. Li

{"title":"Achieving excellent strength-ductility synergy in CoCrFeNi2Al0.3Ti0.25 high entropy alloy via analogous harmonic structure and dual-morphology L12 precipitates strengthening","authors":"A.X. Li, K.W. Kang, J.S. Zhang, D. Huang, M.K. Xu, S.K. Liu, Y.T. Jiang, G. Li","doi":"10.1016/j.intermet.2025.108885","DOIUrl":"10.1016/j.intermet.2025.108885","url":null,"abstract":"<div><div>Achieving a superior combination of high strength and ductility in metallic materials remains a key challenge in materials science. In this study, we improve the strength-ductility synergy of a CoCrFeNi-based high entropy alloy (HEA) by designing an analogous harmonic structure via thermomechanical processing. Microstructural analysis reveals that a soft FCC matrix phase is surrounded by a hard L1<sub>2</sub> precipitate phase, forming a typical core-shell heterogeneous structure. The volume fractions of the core and shell regions are 62.8 % and 37.2 %, respectively. Tensile tests at room temperature demonstrate that the HS-HEA exhibits a yield strength of 1018 MPa, an ultimate tensile strength of 1433 MPa, and a total elongation of 29.0 %. The high yield strength arises from significant strain gradients in the core and shell regions, which induced hetero-deformation induced strengthening, grain boundary strengthening, and precipitation strengthening. Meanwhile, the excellent ductility is attributed to dislocation slip, deformation-induced stacking faults, and Lomer-Cottrel locks, with a minor contribution from deformation twins. These mechanisms collectively enhance work-hardening capacity, delaying plastic instability and enabling an exceptional strength-ductility balance. This research presents a novel approach to strengthening HEAs through analogous harmonic structure, which enhances hetero-deformation induced hardening in addition to traditional mechanisms. These findings provide critical insights for designing heterogeneous structural alloys with outstanding mechanical properties.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108885"},"PeriodicalIF":4.3,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313804","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

Ultra-ductile and high-strength CoCrNi medium entropy alloy with directional grains via laser melting deposition 激光熔化沉积具有定向晶粒的超韧性高强CoCrNi中熵合金

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-18 DOI: 10.1016/j.intermet.2025.108884

Shijia Yin , Xiaoyi Li , Mingliang Wang, Abdukadir Amar, Yiping Lu

{"title":"Ultra-ductile and high-strength CoCrNi medium entropy alloy with directional grains via laser melting deposition","authors":"Shijia Yin , Xiaoyi Li , Mingliang Wang, Abdukadir Amar, Yiping Lu","doi":"10.1016/j.intermet.2025.108884","DOIUrl":"10.1016/j.intermet.2025.108884","url":null,"abstract":"<div><div>Laser melting deposition (LMD) involves large temperature gradients and rapid cooling, which enables microstructural refinement at the nanoscale to achieve high strength. However, LMD provides a high level of strength, often at the expense of ductility due to the refined microstructure and the introduced high density of dislocations. Herein, directional growth along the deposition direction (DD) was obtained by adjusting the process parameters of LMD to improve the strength and ductility of CoCrNi medium-entropy alloy (MEA). In comparison to the as-cast sample, the simultaneous increment in both strength and ductility is achieved by LMD along the DD. Especially, the ductility of the LMD sample tensile along the DD (ultimate tensile strain <em>ε</em><sub><em>U</em></sub> = 91 %) was superior to those of other additively manufactured MEAs and the state-of-the-art steels, which was mainly attributed to the reduced transverse grain boundary density and simplified orientation ([001]) of columnar grain, and the enhancement of work-hardening capacity due to the activation of a large number of stacking faults and twins during the deformation. This work provides a new possibility to achieve high-strength and ultra-ductile complex-shaped metallic parts via designing directional grains by LMD.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108884"},"PeriodicalIF":4.3,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313805","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

Grain boundary interdiffusion in CoFeNi/Sn system: Analysis of phase growth and compositional complexity CoFeNi/Sn体系的晶界互扩散：相生长和成分复杂性分析

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-17 DOI: 10.1016/j.intermet.2025.108887

Bhawna Yadav , T.N. Prasanthi , K. Guruvidyathri , M. Sadhasivam , C. Sudha , K.G. Pradeep , M. Vaidya

{"title":"Grain boundary interdiffusion in CoFeNi/Sn system: Analysis of phase growth and compositional complexity","authors":"Bhawna Yadav , T.N. Prasanthi , K. Guruvidyathri , M. Sadhasivam , C. Sudha , K.G. Pradeep , M. Vaidya","doi":"10.1016/j.intermet.2025.108887","DOIUrl":"10.1016/j.intermet.2025.108887","url":null,"abstract":"<div><div>Grain boundary interdiffusion in the CoFeNi/Sn system is explored by investigating diffusion couples of coarse-grained (CG > 200 μm) and ultrafine-grained (UFG ∼800 nm) CoFeNi alloys with Sn in the temperature range 175–215 °C. The CG and UFG CoFeNi samples were prepared through vacuum arc melting (VAM) and spark plasma sintering (SPS) of mechanically alloyed CoFeNi powders, respectively. At 175 °C, formation of (Co, Ni)Sn<sub>3</sub> and FeSn<sub>2</sub> intermetallic phases is observed at both the interfaces. At 200 °C, (Co, Ni)Sn<sub>3</sub> and FeSn<sub>2</sub> persisted across annealing durations of 120, 180, and 240 h, with a gradual increase in their thickness. However, at 300 h, a phase mixture of (Co, Ni)Sn<sub>3</sub> and FeSn<sub>2</sub> emerged between the two single phase layers. At 215 °C, the presence of FeSn<sub>2</sub>, (Co, Ni)Sn<sub>3</sub>, and their phase mixture was observed consistently, with progressive thickening over time. Phase formation in the interdiffusion zone has been confirmed using correlative microscopy methods. Time dependent studies reveal the pronounced phase growth in UFG CoFeNi/Sn compared to CG CoFeNi/Sn. The accelerated diffusion kinetics at the UFG interface can be attributed to the higher fraction of grain boundaries (GBs). The comparison of CoFeNi/Sn diffusion couples with reported studies of Ni/Sn and CoNi/Sn reveal that the effect of enhanced GB fraction on kinetics is partially nullified by the compositional complexity of end members in the interdiffusion zone. The experimental data across the 175–215 °C range provide valuable insights that can aid in refining the phase diagram and expanding the available database for this multicomponent alloy system.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108887"},"PeriodicalIF":4.3,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306770","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

In-situ synthesized Ti5Si3-Ti2AlC reinforced TiAl composite with enhanced tribological properties 原位合成Ti5Si3-Ti2AlC增强TiAl复合材料的摩擦学性能

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-16 DOI: 10.1016/j.intermet.2025.108880

Yupeng Wang , Siying Li , Tengfei Ma , Xiaohong Wang , Qiaoyu Li , Yongzhe Wang , Hongze Fang , Ruirun Chen

{"title":"In-situ synthesized Ti5Si3-Ti2AlC reinforced TiAl composite with enhanced tribological properties","authors":"Yupeng Wang , Siying Li , Tengfei Ma , Xiaohong Wang , Qiaoyu Li , Yongzhe Wang , Hongze Fang , Ruirun Chen","doi":"10.1016/j.intermet.2025.108880","DOIUrl":"10.1016/j.intermet.2025.108880","url":null,"abstract":"<div><div>Herein, the TiAl composite with Ti<sub>5</sub>Si<sub>3</sub> and Ti<sub>2</sub>AlC particles reinforced was designed to improve its tribological properties at different temperatures, in which was in-situ fabricated by spark plasma sintering using Ti-48Al-2Nb-2Cr alloy with addition of SiC particles. Moreover, the Ti<sub>5</sub>Si<sub>3</sub> particles were predominantly distributed at the lamellar colony boundaries forming a discontinuous network structure, while Ti<sub>2</sub>AlC particles primarily precipitate at the interfaces of α<sub>2</sub>/γ lamellae. The tribological results exhibited the friction coefficient of TiAl composite was lower than that of TiAl alloy at room-temperature and elevated temperatures (650, 750, and 850 °C). The friction coefficients were 0.48 and 0.54 for TiAl composite at room-temperature and 850 °C, reduced by 21.3 % and 12.9 % compared to TiAl alloy. However, the wear rate was reversed at 750 and 850 °C indicating the change of wear mechanism. The abrasive and ploughing wear transform to plastic deformation, oxidation wear and adhesive wear at 650 °C for pure TiAl alloy, and the transformation temperature was 750 °C for TiAl composite. It revealed that TiAl composite showed superior wear resistance at different temperatures, which mainly attributed to the Ti<sub>5</sub>Si<sub>3</sub>–Ti<sub>2</sub>AlC particles refined microstructure and enhanced microhardness, strength, and oxidation resistance.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108880"},"PeriodicalIF":4.3,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144290524","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 aging time on multiphase microstructure and high-temperature creep properties of weldable Ni3Al-based alloy with ultrafine β phase 时效时间对具有超细β相可焊ni3al基合金多相组织和高温蠕变性能的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-06-16 DOI: 10.1016/j.intermet.2025.108881

Jing Wu , Peichang Zhang , Jinlong Liu , Weichao Wang , Yatao Du , Junting Luo , Shiyou Gao , Chong Li , Yongchang Liu

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