Tensile behavior of Ti-22Al-24Nb-0.5Mo in the range 25-650 °C

被引：52
|
作者：
Zhao, Hongze [1 ,2 ]
Lu, Bin [1 ]
Tong, Min [1 ]
Yang, Rui [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2017年 / 679卷
关键词：
Ti2AlNb-based alloy; Microstructures; Tensile behavior; Fracture mechanisms; BCC ORTHORHOMBIC ALLOYS; CREEP-BEHAVIOR; MICROSTRUCTURAL EVOLUTION; FRACTURE-BEHAVIOR; ROOM-TEMPERATURE;
D O I：
10.1016/j.msea.2016.10.047
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The tensile and fracture behavior of an orthorhombic alloy Ti-22Al-24Nb-0.5Mo (at%) with three types of microstructure were investigated in the temperature range between 25 degrees C and 650 degrees C. The O+bcc microstructure (basketweave lath type) possesses an elongation maximum at 500 degrees C and its drop at 650 degrees C has been attributed to dynamic strain aging as suggested by previous investigators. The alpha(2)+bcc microstructure has the highest room temperature elongation (epsilon(f) > 18%) and the cause of the elongation drop at 650 degrees C is suggested to be the fine O phase precipitates from the bcc phase. An optimal balance between strength and plasticity was achieved in the alpha(2)+O+bcc microstructure.
引用
收藏
页码：455 / 464
页数：10
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