Microstructure refinement of a TiAl alloy by beat treatment

被引：24
作者：
Wang, Y
Wang, JN [1 ]
Xia, QF
Yang, J
机构：
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200030, Peoples R China
[2] Cent S Univ Technol, Powder Met Res Inst, Changsha 410083, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2000年 / 293卷 / 1-2期
关键词：
TiAl based alloy; grain refinement; cyclic heat treatment; equiaxed gamma; fine fully lamellar structure;
D O I：
10.1016/S0921-5093(00)01047-9
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In order to refine the as-cast microstructure of a TiAl based alloy with a grain size of similar to 1000 mu m, a multiple-stage heat treatment was carried out and a fine fully lamellar microstructure (FFL) with a grain size of 10-20 mu m was obtained. This treatment route includes pretreatment in the single a field, cyclical treatment and aging in the alpha+gamma field and solution treatment in the cc field again. The final refining result appears to be influenced by the aging length. (C) 2000 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：102 / 106
页数：5
相关论文
共 12 条
[1]  
ABE E, 1997, STRUCTURAL INTERMETA, P167
[2]   ON THE TEMPERATURE-DEPENDENCE OF YIELD STRESS IN TIAL BASE ALLOYS [J].
HUANG, SC ;
HALL, EL .
SCRIPTA METALLURGICA ET MATERIALIA, 1991, 25 (08) :1805-1809
[3]   CHARACTERIZATION OF THE HIGH-TEMPERATURE PHASE FIELDS NEAR STOICHIOMETRIC GAMMA-TIAL [J].
HUANG, SC ;
SIEMERS, PA .
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1989, 20 (10) :1899-1906
[4]  
KIM YW, 1994, JOM-J MIN MET MAT S, V46, P30, DOI 10.1007/BF03220745
[5]  
KIM YW, 1989, JOM-J MIN MET MAT S, V41, P24
[6]  
Liu CT, 1995, GAMMA TITANIUM ALUMINIDES, P679
[7]   Microstructural control and mechanical properties of dual-phase TiAl alloys [J].
Liu, CT ;
Maziasz, PJ .
INTERMETALLICS, 1998, 6 (7-8) :653-661
[8]   Development of ultrafine lamellar structures in two-phase γ-TiAl alloys [J].
Maziasz, PJ ;
Liu, CT .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1998, 29 (01) :105-117
[9]   Refining of coarse lamellar microstructure of TiAl alloys by rapid heat treatment [J].
Wang, JN ;
Xie, K .
INTERMETALLICS, 2000, 8 (5-6) :545-548
[10]   The role of ledges in creep of TiAl alloys with fine lamellar structures [J].
Wang, JN ;
Nieh, TG .
ACTA MATERIALIA, 1998, 46 (06) :1887-1901
12