Microstructural evolution during high temperature deformation of lamellar Ti48Al-2Nb-2Cr

被引：7
作者：
Hofmann, U [1 ]
Blum, W [1 ]
机构：
[1] Univ Erlangen Nurnberg, Inst Werkstoffwissensch, D-91058 Erlangen, Germany
来源：
INTERMETALLICS | 1999年 / 7卷 / 3-4期
关键词：
D O I：
10.1016/S0966-9795(98)00097-1
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The microstructural evolution of lamellar Ti48Al-2Nb-2Cr during deformation at temperatures between 1000 and 1200 K was investigated by light optical and electron microscopy. The lamellar structure which initially covers more than 95% of the volume transforms during deformation into a globular structure consisting of equiaxed subgrains with a significant amount of large angle boundaries (< 30%). The steady state subgrain size and the spacing of dislocations in the subgrain interior vary in inverse proportion to shear modulus normalized stress. Based on the steady state data the evolution of the volume fraction with globular (subgrain) structure and the characteristic spacings is quantified. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：351 / 361
页数：11
相关论文
共 18 条
  • [1] APPEL F, 1994, MATER RES SOC SYMP P, V318, P691
  • [2] SUBGRAIN BOUNDARY MIGRATION DURING CREEP OF LIF .2. CONSTANT-STRESS EXPERIMENTS
    BIBERGER, M
    BLUM, W
    [J]. PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1992, 66 (01): : 27 - 40
  • [3] Dynamics of recovery and recrystallization
    Blum, W
    McQueen, HJ
    [J]. ALUMINIUM ALLOYS: THEIR PHYSICAL AND MECHANICAL PROPERTIES, PTS 1-3, 1996, 217 : 31 - 42
  • [4] Blum W, 1996, JOHANNES WEERTMAN SYMPOSIUM, P103
  • [5] BLUM W, 1991, HOT DEFORMATION ALUM, P181
  • [6] CREEP DEFORMATION AND CREEP MICROSTRUCTURES OF A NEAR GAMMA-TIAL ALLOY TI-48AL-2CR
    ESSOUNI, M
    BARTELS, A
    WAGNER, R
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1993, 171 (1-2): : 127 - 141
  • [7] FULLMAN RI, 1953, T AIME, V137, P447
  • [8] A 1ST REPORT ON THE CREEP DEFORMATION AND DAMAGE BEHAVIOR OF A FINE-GRAINED FULLY TRANSFORMED LAMELLAR-GAMMA TIAL ALLOY
    HAYES, RW
    MCQUAY, PA
    [J]. SCRIPTA METALLURGICA ET MATERIALIA, 1994, 30 (02): : 259 - 264
  • [9] A SIMPLE-MODEL OF DEFORMATION OF TI48AL-2CR-2NB AT HIGH-TEMPERATURES
    HOFMANN, U
    BLUM, W
    [J]. SCRIPTA METALLURGICA ET MATERIALIA, 1995, 32 (03): : 371 - 376
  • [10] Hofmann U, 1996, Z METALLKD, V87, P411
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