Elevated temperature deformation behavior of discontinuous-reinforced titanium aluminide matrix composites

被引:11
作者
Marte, JS
Kampe, SL [1 ]
Wereszczak, AA
机构
[1] Virginia Polytech Inst & State Univ, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA
[2] GE Co, Global Res Ctr, Schenectady, NY 12301 USA
[3] Oak Ridge Natl Lab, High Temp Mat Lab, Oak Ridge, TN 37831 USA
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2003年 / 346卷 / 1-2期
关键词
titanium aluminide composites; particulate reinforced titanium aluminides; high temperature deformation; TiB2-reinforced composites;
D O I
10.1016/S0921-5093(02)00553-1
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A series of Al3Ti- and near-gamma TiAl-matrix discontinuously-reinforced composites have been produced and their elevated temperature flow behavior evaluated. Specifically, steady state compressive flow stress (i.e. maximum flow stress) was determined as a function of temperature (1000, 1100, 1200 degreesC), strain-rate (10(-3), 10(-4) s(-1)), and composite reinforcement loading percentage (30, 40, 50 v%). The experimental results have been used to develop unified constitutive equations for each matrix type that can be used to survey the sensitivity of the respective flow behavior to the independent variables of high temperature wrought processing. The results indicate that while the temperature and strain-rate dependence of flow stress can be described in terms of a traditional Zener-Holloman (temperature-compensated strain-rate) analysis, reinforcement volume percentage may additionally represent a non-traditional but influential independent variable of processing. It is shown that particulate volume loading can be used to positively influence the deformability characteristics of the composite. Crown Copyright (C) 2002 Published by Elsevier Science B.V. All rights reserved.
引用
收藏
页码:292 / 301
页数:10
相关论文
共 28 条
[1]   A mechanical interpretation of the activation energy of high temperature deformation in two phase materials [J].
Briottet, L ;
Jonas, JJ ;
Montheillet, F .
ACTA MATERIALIA, 1996, 44 (04) :1665-1672
[2]   Combining metals and sciences: ways of investigating intermetallics [J].
Cahn, RW .
INTERMETALLICS, 1998, 6 (7-8) :563-566
[3]  
DIETER GE, 1986, MECH METALLURGY, P307
[4]   RECENT PROGRESS ON INTERMETALLIC ALLOYS FOR ADVANCED AEROSPACE SYSTEMS [J].
DIMIDUK, DM ;
MIRACLE, DB ;
KIM, YW ;
MENDIRATTA, MG .
ISIJ INTERNATIONAL, 1991, 31 (10) :1223-1234
[5]   PRODUCTION, CHARACTERISTICS, AND COMMERCIALIZATION OF TITANIUM ALUMINIDES [J].
FROES, FH ;
SURYANARAYANA, C ;
ELIEZER, D .
ISIJ INTERNATIONAL, 1991, 31 (10) :1235-1248
[6]   SYNTHESIS, PROPERTIES AND APPLICATIONS OF TITANIUM ALUMINIDES [J].
FROES, FH ;
SURYANARAYANA, C ;
ELIEZER, D .
JOURNAL OF MATERIALS SCIENCE, 1992, 27 (19) :5113-5140
[7]   MICROSTRUCTURE EVOLUTION IN TIAL ALLOYS WITH B-ADDITIONS - CONVENTIONAL SOLIDIFICATION [J].
HYMAN, ME ;
MCCULLOUGH, C ;
VALENCIA, JJ ;
LEVI, CG ;
MEHRABIAN, R .
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1989, 20 (09) :1847-1859
[8]   ROOM-TEMPERATURE STRENGTH AND DEFORMATION OF TIB2-REINFARCED NEAR-GAMMA TITANIUM ALUMINIDES [J].
KAMPE, SL ;
SADLER, P ;
CHRISTODOULOU, L ;
LARSEN, DE .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1994, 25 (10) :2181-2197
[9]   Strength and ductility in TiAl alloys [J].
Kim, YW .
INTERMETALLICS, 1998, 6 (7-8) :623-628
[10]   Ductility and toughness in intermetallics [J].
Kimura, Y ;
Pope, DP .
INTERMETALLICS, 1998, 6 (7-8) :567-571