Superplastic phenomenon in a large-grained TiAl alloy

被引：48

作者：

Sun, F ^{[1
]}

Lin, DL ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Open Lab Educ, Minist China High Temp Mat & Tests, Shanghai 200030, Peoples R China

来源：

SCRIPTA MATERIALIA | 2001年 / 44卷 / 04期

基金：

中国国家自然科学基金;

关键词：

TiAl alloy; high temperature mechanical properties; continuous recovery and recrystallization;

D O I：

10.1016/S1359-6462(00)00635-7

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The large-grained TiAl alloy exhibits superplasticity in the temperature range of 1025-1100°C and strain rate ranging from 4 × 10-5 s-1 to 1.28 × 10-3 s-1. A maximum elongation of 287.5% with a m value of 0.39 was obtained at 1100°C and 4 × 10-5 s-1. The activation energy was determined as 331.4 kJ/mol, which suggests the rate process of superplatic deformation is controlled by lattice diffusion. A significant refinement of average grain size during superplastic deformation was found, which is beneficial to improve mechanical properties.

引用

页码：665 / 670

页数：6

共 11 条

[1]

ARAN A, 1997, SCRIPTA MATER, V13, P834

[2]

KROLL S, 1992, Z METALLKD, V83, P591

[3] STUDY OF SUPERPLASTIC DEFORMATION IN AN FEAL BASED ALLOY WITH LARGE GRAINS [J].

LI, DQ ;

SHAN, AD ;

LIU, Y ;

LIN, DL .

SCRIPTA METALLURGICA ET MATERIALIA, 1995, 33 (04) :681-685

[4] SUPERPLASTICITY AND STRUCTURE OF ALUMINUM [J].

LIKHACHEV, VA ;

MYSHLYAEV, MM ;

OLEVSKII, SS ;

CHUCHMAN, TN .

ACTA METALLURGICA, 1974, 22 (07) :829-834

[5] Superplasticity in large-grained Fe3Al alloys [J].

Lin, D ;

Lin, TL ;

Shan, A ;

Chen, M .

INTERMETALLICS, 1996, 4 (06) :489-496

[6] SUPERPLASTICITY IN FE3AL-TI ALLOY WITH LARGE GRAINS [J].

LIN, DL ;

SHAN, AD ;

LI, DQ .

SCRIPTA METALLURGICA ET MATERIALIA, 1994, 31 (11) :1455-1460

[7]

Lin DL, 1998, INTERMETALLICS, V6, P243, DOI 10.1016/S0966-9795(97)00072-1

[8] The microstructural evolution during superplastic deformation in FeAl intermetallic compound [J].

Liu, Y ;

Li, DQ ;

Lin, DL ;

Chen, SP .

SCRIPTA MATERIALIA, 1996, 34 (07) :1095-1100

[9] Microstructural characteristics and deformation properties in superplastic intermetallics [J].

Nieh, TG ;

Wadsworth, J .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1997, 240 :88-96

[10] Single-phase interdiffusion in TiAl [J].

Sprengel, W ;

Oikawa, N ;

Nakajima, H .

INTERMETALLICS, 1996, 4 (03) :185-189

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