首页|(Ti60Cr30Nb10)100-xAlx轻质中熵合金的力学与腐蚀性能

(Ti60Cr30Nb10)100-xAlx轻质中熵合金的力学与腐蚀性能

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研究轻质(Ti60Cr30Nb10)100-xAlx(x=0,5,7.5,10,摩尔分数,％)中熵合金在铸态和均匀化态下的显微组织、力学性能和腐蚀行为.结果表明,随着Al含量从0增加到10％(摩尔分数),铸态合金均由相同的相组成,即体心立方(BCC)相和少量TiCr2型Laves相组成.均匀化后,所有合金均由单相BCC组成.此外,(Ti60Cr30Nb10)95Al5中熵合金表现出在铸态和均匀态条件下最优异的力学性能,屈服强度分别约为1048 MPa和1017 MPa,同时保持超50％压缩应变.与TC4和铸态(Ti60Cr30Nb10)95Al5合金相比,均匀态(Ti60Cr30Nb10)95Al5合金表现出更优异的耐腐蚀性能,这主要归因于均匀的显微组织与化学成分.
Mechanical and corrosion properties of lightweight(Ti60Cr30Nb10)100-xAlx medium-entropy alloys
Microstructure,mechanical properties and corrosion behavior of lightweight(Ti60Cr30Nb10)100-xAlx(x=0,5,7.5 and 10,at.％)medium-entropy alloys(MEAs)were investigated in the as-cast and homogenized states.As the Al content increases from 0 to 10 at.％,all the as-cast MEAs consist of identical phase composition,i.e.,a body-centered cubic(BCC)phase and a small amount of TiCr2 Laves phase.After the homogenization,all the homogenized MEAs show a single BCC phase.The(Ti60Cr30Nb10)95Al5 MEA shows the most excellent mechanical properties both in as-cast and homogenized states among the studied alloys,displaying yield strengths of～1048 MPa and～1017 MPa along with the compression strain exceeding 50％.Additionally,compared with the TC4 and the as-cast(Ti60Cr30Nb10)95Al5 alloys,the homogenized(Ti60Cr30Nb10)95Al5 alloy shows superior corrosion resistance due to its uniform microstructure and chemical composition.

medium-entropy alloylightweight alloymicrostructuremechanical propertiescorrosion behavior

王浩、陈维平、郝良彦、褚晨亮、熊伟、付志强

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华南理工大学广东省金属新材料制备与成形重点实验室,广州 510641

华南理工大学国家金属材料近净成形工程技术研究中心,广州 510641

Physical Metallurgy and Materials Design Laboratory,Department of Mechanical Engineering and Materials Science,University of Pittsburgh,Pittsburgh,PA,15261,USA

中熵合金 轻质合金 显微组织 力学性能 腐蚀行为

National Natural Science Foundation of ChinaBasic and Applied Basic Research Foundation of Guangdong Province,ChinaKey-Area Research and Development Program of Guangdong Provincetechnical support of Sinoma Institute of Materials Research(Guangzhou)Co.,Ltd.(China)

521033602020A15151111042018B090905002

2024

10.1016/S1003-6326(23)66393-9

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(1)
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