Formation of low angle boundaries in Ni-based superalloys

被引：74
作者：
D'Souza, N
Newell, M
Devendra, K
Jennings, PA
Ardakani, MG
Shollock, BA
机构：
[1] Rolls Royce PLC, Precis Casting Facil, Derby DE24 8BJ, England
[2] Univ Birmingham, IRC Mat Proc, Birmingham B15 2TT, W Midlands, England
[3] Rolls Royce PLC, Co Res & Dev Foundry, Bristol BS34 7QE, Avon, England
[4] Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2005年 / 413卷
关键词：
cumulative misorientation; low angle boundary; dendrite; plastic bending; SOLIDIFICATION;
D O I：
10.1016/j.msea.2005.08.188
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The evolution of misorientation accompanying branching and growth of dendrite stems advancing into an increasingly undercooled liquid at a geometrical discontinuity in cross section (platform of a turbine blade) during solidification of a Ni-base superalloy has been experimentally investigated. The misorientation generated is cumulative in nature with a systematic rotation of the principal < 001 >-crystal axes. It is proposed that the misorientation arises from plastic deformation of the dendrite stems during growth. Low angle boundaries are subsequently produced across impinging dendrite fronts. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：567 / 570
页数：4
相关论文
共 11 条
  • [1] Mechanical deformation of dendrites by fluid flow during the solidification of undercooled melts
    Dragnevski, K
    Mullis, AM
    Walker, DJ
    Cochrane, RF
    [J]. ACTA MATERIALIA, 2002, 50 (14) : 3743 - 3755
  • [2] Goulette M J, 1984, P 5 INT S SUP, P167
  • [3] CHANNEL CONVECTION IN PARTLY SOLIDIFIED SYSTEMS
    HELLAWELL, A
    SARAZIN, JR
    STEUBE, RS
    [J]. PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1993, 345 (1677): : 507 - 544
  • [4] HOOPER PR, 2001, COMMUNICATION
  • [5] McLean M., 1983, DIRECTIONALLY SOLIDI
  • [6] The convergence-fault mechanism for low-angle boundary formation in single-crystal castings
    Napolitano, RE
    Schaefer, RJ
    [J]. JOURNAL OF MATERIALS SCIENCE, 2000, 35 (07) : 1641 - 1659
  • [7] NEWELL M, IN PRESS MAT SCI E A
  • [8] RANDLE V, 1992, MICRO TEXTUR EDETERM
  • [9] PROBABILISTIC MODELING OF MICROSTRUCTURE FORMATION IN SOLIDIFICATION PROCESSES
    RAPPAZ, M
    GANDIN, CA
    [J]. ACTA METALLURGICA ET MATERIALIA, 1993, 41 (02): : 345 - 360
  • [10] DENDRITIC GROWTH AND CRYSTALLINE QUALITY OF NICKEL-BASE SINGLE GRAINS
    SIREDEY, N
    BOUFOUSSI, M
    DENIS, S
    LACAZE, J
    [J]. JOURNAL OF CRYSTAL GROWTH, 1993, 130 (1-2) : 132 - 146
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