Thermal stability of bulk nanocrystalline Ti-10V-2Fe-3Al alloy

被引:11
|
作者
Chen, Wei [1 ,2 ]
Sun, Qiaoyan [1 ]
Xiao, Lin [1 ]
Sun, Jun [1 ]
机构
[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
[2] Xi An Jiao Tong Univ, State Key Lab Mech Struct Strength & Vibrat, Xian 710049, Peoples R China
基金
中国博士后科学基金;
关键词
Ti-10V-2Fe-3Al alloy; Nanocrystalline; Thermal stability; Microstructure; Vickers hardness; SEVERE PLASTIC-DEFORMATION; TO-RUTILE TRANSFORMATION; NANOSTRUCTURED MATERIALS; MECHANICAL-PROPERTIES; TITANIA POWDERS; GRAIN-GROWTH; BEHAVIOR; REFINEMENT; MICROSTRUCTURE; COPPER;
D O I
10.1016/j.msea.2012.01.001
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Thermal stability of the nanocrystalline Ti-10V-2Fe-3Al alloy produced by cold-forging and corresponding hardness variations were investigated. When the annealing temperature was lower than 400 degrees C, the primary features were the decline of lattice defect density and the increase of lattice ordering level in the vicinity of grain boundaries, named as grain boundary relaxation. The nanocrystalline grains grew slowly. In comparison, when the annealing temperature was higher than 400 degrees C, the decomposition of the deformation-induced alpha '' martensites and the subsequent rapid grain growth were observed. Vickers hardness measurement shows an initial hardening followed by a softening with the increase of annealing temperature. The hardening peak appeared at 400 degrees C. The critical grain growth temperature, i.e.. T-cgg, in the nanocrytalline Ti-10V-2Fe-3Al alloy, was slightly lower than those in other nanocrystalline alloys. That could be attributed to the martensitic decomposition-induced grain growth in this alloy. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:223 / 230
页数:8
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