Long term creep of TiAl+W+Si with polycrystalline and columnar grain structures

被引：16
作者：
Beddoes, J
Seo, DY
Saari, H
机构：
[1] Carleton Univ, Dept Mech & Aerosp Engn, Ottawa, ON K1S 5B6, Canada
[2] Natl Res Council Canada, Inst Aerosp Res, Struct Mat & Prop Lab, Ottawa, ON K1A 0R6, Canada
来源：
SCRIPTA MATERIALIA | 2005年 / 52卷 / 08期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Bridgman technique; directional solidification; titanium aluminides; creep;
D O I：
10.1016/j.scriptamat.2004.12.016
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The long term creep properties at 207 MPa and 760degreesC of TiAl + W + Si with a fully lamellar microstructure and either polycrystalline grains or a columnar grain structure are compared. The results indicate that the columnar grain structure reduces the primary creep strain and delays the onset of tertiary creep, with only 1.2% creep strain after 10,000 h. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：745 / 750
页数：6
相关论文
共 17 条
  • [1] Microstructure in Ti-48at.%Al PST crystal subjected to creep deformation
    Asai, T
    Hirata, S
    Takeyama, M
    Matsuo, T
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 329 : 828 - 834
  • [2] Beddoes J, 1995, INT MATER REV, V40, P197, DOI 10.1179/095066095790151151
  • [3] BEDDOES J, 1999, MAT RES SOC P, V552
  • [4] Effect of aging on the tensile and creep behavior of a fully lamellar near γ-TiAl alloy
    Chen, WR
    Beddoes, J
    Zhao, L
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 323 (1-2): : 306 - 317
  • [5] DEFORMATION STRUCTURES IN TI-RICH TIAL POLYSYNTHETICALLY TWINNED CRYSTALS
    INUI, H
    NAKAMURA, A
    OH, MH
    YAMAGUCHI, M
    [J]. PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1992, 66 (04): : 557 - 573
  • [6] Directional solidification and microstructural control of the TiAl/Ti3Al lamellar microstructure in TiAl-Si alloys
    Johnson, DR
    Inui, H
    Yamaguchi, M
    [J]. ACTA MATERIALIA, 1996, 44 (06) : 2523 - 2535
  • [7] Thermophysical property determination of high temperature alloys by thermal analysis
    Saari, H
    Seo, DY
    Blumm, J
    Beddoes, J
    [J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2003, 73 (01) : 381 - 388
  • [8] SAARI H, IN PRESS UNTERMETALL
  • [9] Primary creep behavior of Ti-48Al-2W as a function of stress and lamellar morphology
    Seo, DY
    Beddoes, J
    Zhao, L
    [J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2003, 34A (10): : 2177 - 2190
  • [10] The influence of aging on the microstructure and creep behaviour of a γ-Ti-48%A1-2%W intermetallic
    Seo, DY
    Beddoes, J
    Zhao, L
    Botton, GA
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 329 : 810 - 820
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