Grain size refinement of a TiAl alloy by rapid heat treatment

被引：45
|
作者：
Wang, JN [1 ]
Xie, K [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200030, Peoples R China
来源：
SCRIPTA MATERIALIA | 2000年 / 43卷 / 05期
基金：
中国国家自然科学基金;
关键词：
titanium aluminide; mechanical properties; rapid heat treatment; phase transformation;
D O I：
10.1016/S1359-6462(00)00419-X
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The grain refinement of TiAl alloys by rapid heat treatment was investigated. A coarse fully lamellar structure with d = 500 μm could be refined to a fine one with d = 10 μm. To successfully achieve grain refinement, several parameters should be well controlled including the heating rate, annealing temperature, holding time and cooling rate. Mechanical testing showed that the refinement, the room temperature yield strength was improved from 330 to 660 MPa, fracture strength from 415 to 825 MPa and ductility from 0.7 to 3.3%.
引用
收藏
页码：441 / 446
页数：6
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