HOT DEFORMATION BEHAVIOR AND MICROSTRUCTURE EVOLUTION OF A HIGH-Nb-CONTAINING TiAl BASED ALLOY

被引：3

作者：

Wang Gang ^{[1
]}

Xu Lei ^{[1
]}

Wang Yong ^{[1
]}

Zheng Zhuo ^{[1
]}

Cui Yuyou ^{[1
]}

Yang Rui ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China

来源：

ACTA METALLURGICA SINICA | 2011年 / 47卷 / 05期

关键词：

TiAl alloy; processing map; hot deformation; dynamic recrystallization; superplasticity; PROCESSING MAPS; PLASTIC-DEFORMATION; TITANIUM-ALLOYS; SUPERPLASTICITY; WORKING; FLOW;

D O I：

10.3724/SP.J.1037.2011.00005

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The hot deformation behavior of a high-Nb-containing TiAl based alloy has been studied using the processing map approach. Compression tests were conducted in the temperature range of 950-1300 degrees C and the strain rate range of 0.001 s(-1) to 10 s(-1) on a Gleeble-3800 testing system. The flow stress was found to be strongly dependent on the temperature and the strain rate. The regimes of flow instability have been delineated in the temperature range of 950-1200 degrees C and the strain rate ranges from 1 s(-1) to 10 s(-1), as well as in the temperature of 1250-1300 degrees C and the strain rate of 10 s(-1). The optimal hot-working conditions for the investigated TiAl alloy are in two regimes: (i) in the temperature range 950-1100 degrees C and at the strain rate of 0.001 s(-1) to 0.1 s(-1), and (ii) in the temperature range 1250-1300 degrees C and at the strain rate of 0.001 s(-1) to 1 s(-1). The material exhibited dynamic recrystallization to produce a fine-grained microstructure in these conditions. In the temperature range 1150-1200 degrees C with the strain rate 0.001 s(-1), the alloy exhibited superplasticity.

引用

页码：587 / 593

页数：7

共 20 条

[11] Development of processing maps for Al/SiCP composite using fuzzy logic
Ramanathan, S.
Karthikeyan, R.
Gupta, Manoj
[J]. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2007, 183 (01) : 104 - 110
[12] Characteristics of superplasticity domain in the processing map for hot working of as-cast Mg-11.5Li-1.5Al alloy
Sivakesavam, O
Prasad, YVRK
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 323 (1-2): : 270 - 277
[13] Hot deformation behaviour of Mg-3Al alloy - A study using processing map
Srinivasan, N.
Prasad, Y. V. R. K.
Rao, P. Rama
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 476 (1-2): : 146 - 156
[14] HOT-WORKING CHARACTERISTICS OF NIMONIC-75, NIMONIC-80A AND NIMONIC-90 SUPERALLOYS - A COMPARISON USING PROCESSING MAPS
SRINIVASAN, N
PRASAD, YVRK
[J]. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 1995, 51 (1-4) : 171 - 192
[15] Tang WN, 2006, ACTA METALL SIN, V42, P1096
[16] Effect of fabrication process on microstructure of high Nb containing TiAl alloy
Wang, Y. H.
Lin, J. P.
Xu, X. J.
He, Y. H.
Wang, Y. L.
Chen, G. L.
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 458 (1-2) : 313 - 317
[17] Microstructure and mechanical properties of as-cast Ti-45Al-8.5Nb-(W,B,Y) alloy with industrial scale
Wang, Y. H.
Lin, J. P.
He, Y. H.
Wang, Y. L.
Chen, G. L.
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 471 (1-2): : 82 - 87
[18] Thermomechanical processing of alpha titanium alloys - an overview
Weiss, I
Semiatin, SL
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1999, 263 (02): : 243 - 256
[19] Yan Yunqi, 2000, MAT REV, V14, P15
[20] Superplasticity of a γ-TiAl alloy and its microstructure and cavity evolution in deformation
Zhang, Chunping
Zhang, Kaifeng
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2010, 492 (1-2) : 236 - 240

← 1 2 →