Microstructural configuration and compressive deformation behavior of a TiAl composite reinforced by Mn and in situ Ti2AlC particles

被引：54
作者：
Gao, Yun-lei [1 ,2 ,3 ]
Kou, Shu-qing [1 ,2 ,3 ]
Dai, Jun-nan [1 ,2 ,3 ]
Wang, Zhi-fa [1 ,2 ,3 ]
Shu, Shi-li [1 ,4 ]
Zhang, Shuang [1 ,4 ]
Qiu, Feng [1 ,2 ,3 ]
Jiang, Qi-chuan [1 ,2 ,3 ]
机构：
[1] Jilin Univ, State Key Lab Automot Simulat & Control, Changchun, Peoples R China
[2] Jilin Univ, Minist Educ, Key Lab Automobile Mat, Renmin St 5988, Changchun 130025, Jilin, Peoples R China
[3] Jilin Univ, Dept Mat Sci & Engn, Renmin St 5988, Changchun 130025, Jilin, Peoples R China
[4] Jilin Univ, Sch Mech & Aerosp Engn, Renmin St 5988, Changchun 130025, Jilin, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2021年 / 823卷 / 823期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
TiAl intermetallic; Microstructure; Interface; Mechanical properties; Toughening and strengthening mechanism; COMBUSTION SYNTHESIS; STRENGTHENING MECHANISMS; REFINEMENT; FABRICATION; ALLOYS; PHASE;
D O I：
10.1016/j.msea.2021.141772
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
TiAl-5wt.%Ti2AlC-3wt.%Mn composites reinforced by the addition of Mn and in situ synthesized Ti2AlC nanoparticles with a novel microstructure were fabricated. The microstructure and compressive properties of the fabricated composites were thoroughly investigated. The interface between the nanoparticles and the TiAl matrix maintained a very small mismatch and exhibited a stable combination, leading to noticeable grain refinement in the fabricated composites. Furthermore, the yield strength, maximum compressive strength, fracture strain, and strength-ductility balance of the TiAl-5wt.%Ti2AlC-3wt.%Mn composites increased by 30.7%, 10.1%, 5.5%, and 9.9%, respectively, compared with those of the TiAl alloy. The mechanisms by which the properties of the composites were improved mainly thermal mismatch strengthening, Orowan strengthening, grain refinement strengthening, and solid solution strengthening.
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页数：14
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