Simultaneous improvement of strength and plasticity of TZM alloys by introducing α-Al2O3 ceramic particles

被引：3
作者：
Tian, Gaolong [1 ]
Xu, Liujie [1 ,2 ]
Fang, Hong [3 ]
Li, Zhou [2 ]
Li, Xiuqing [2 ]
Zhou, Yuchen [2 ]
Wei, Shizhong [2 ]
机构：
[1] Henan Univ Sci & Technol, Sch Mat Sci & Engn, Luoyang 471000, Peoples R China
[2] Henan Univ Sci & Technol, Natl Joint Engn Res Ctr Abras Control & Molding Me, Luoyang 471003, Henan, Peoples R China
[3] Fonlink Photoelect LuoYang Co LTD, Luoyang 471000, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2024年 / 50卷 / 03期
基金：
中国国家自然科学基金;
关键词：
TZM alloy; alpha-Alpha l(2)O(3) particles; Microstructures; Mechanical properties; Fracture mechanism; HOT DEFORMATION-BEHAVIOR; GRAIN ROTATION; MO-TZM; MECHANICAL-PROPERTIES; PURE MO; MICROSTRUCTURE; FRACTURE; TENSILE; RECRYSTALLIZATION; NANOCRYSTALLINE;
D O I：
10.1016/j.ceramint.2023.11.342
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A new alpha-Al2O3 ceramic particles reinforced TZM alloy material was prepared by powder metallurgy, exhibiting a better combination of strength and plasticity. Comprehensive tensile tests and detailed microstructure observations showed that compared with the TZM alloy. The ultimate tensile strength and uniform elongation of the TZM-0.9 wt% Al2O3 alloy increased by 22 % and 55 %, respectively, and all the strengthened TZM alloys exhibited typical toughness fracture characteristics. Based on theoretical analysis, strengthening is mainly caused by the mismatch of the elastic modulus between alpha-Al2O3 ceramic particles and the molybdenum matrix, accounting for 71 % of the increase in total strength. Mismatch of the elastic modulus can increase the dislocation density of the matrix around alpha-Al2O3 particles. In addition, alpha-Alpha l(2)O(3) particles promote the rotation of grains along the <111> direction during plastic deformation, leading to activation of the slip system and promotes the improvement of plasticity.
引用
收藏
页码：5685 / 5698
页数：14
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