Effect of annealing temperature on martensitic transformation of Ti49.2Ni50.8 alloy processed by equal channel angular pressing

被引：20
|
作者：
Zhang, Dian-tao [1 ,2 ]
Guo, Bao [1 ,2 ]
Tong, Yun-xiang [1 ,2 ]
Tian, Bing [1 ,2 ]
Li, Li [1 ,2 ]
Zheng, Yu-feng [2 ,3 ]
Gunderov, Dmitry-V [4 ]
Valiev, Ruslan-Z [4 ]
机构：
[1] Harbin Engn Univ, Key Lab Superlight Mat & Surface Technol, Minist Educ, Harbin 150001, Peoples R China
[2] Harbin Engn Univ, Ctr Biomed Mat & Engn, Coll Mat Sci & Chem Engn, Harbin 150001, Peoples R China
[3] Peking Univ, Dept Mat Sci & Engn, Coll Engn, Beijing 100871, Peoples R China
[4] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa 450000, Russia
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2016年 / 26卷 / 02期
基金：
中国国家自然科学基金;
关键词：
TiNi alloy; equal channel angular pressing; martensitic transformation; annealing temperature; SHAPE-MEMORY ALLOYS; R-PHASE-TRANSFORMATION; MECHANICAL-PROPERTIES; CYCLIC REVERSIBILITY; BEHAVIOR; TINI; DEFORMATION; EXTRUSION; PRESSURE;
D O I：
10.1016/S1003-6326(16)64133-X
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The effect of annealing temperature on the martensitic transformation of a Ti49.2Ni50.8 alloy processed by equal channel angular pressing (ECAP) was investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM) and differential scanning calorimetry (DSC). The as-ECAP processed and subsequently annealed Ti49.2Ni50.8 alloys consist of B2 parent phase, Ti4Ni2O phase and B19' martensite at room temperature. Upon cooling, all samples show B2 -> R -> B19' two-stage transformation. Upon heating, when the annealing temperature is less than 400 degrees C, the samples show B19'-> R -> B2 two-stage transformation; when the annealing temperature is higher than 500 degrees C, the samples show B19'-> B2 single-stage transformation. The B2-R transformation is characterized by wide interval due to the dislocations introduced during ECAP.
引用
收藏
页码：448 / 455
页数：8
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