Microscopic phase-field simulation for the precipitation process of D022 and L12 phases in Ni-Cr-Al alloy

被引：0
|
作者：
Lu Yanli [1 ]
Chen Zheng [1 ]
Wang Yongxin [1 ]
Li Yongsheng [1 ]
Chu Zhong [1 ]
机构：
[1] Northwestern Polytech Univ, Coll Mat Sci, Xian 710072, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2007年 / 36卷 / 12期
关键词：
Ni75Cr19Al6.0; alloy; precipitation; elastic strain energy; microscopic phase-field; simulation;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The precipitation processes of D0(22) and L1(2) phases in Ni(75)Cr(19)Al(6.0)alloy were simulated based on the microscopic phase-field kinetic model and the microelasticity theory in this paper. During early precipitation process, D0(22) phases precipitated from the disorder matrix by the spinodal decomposition mechanism and the L1(2) phases precipitated by the non-classical nucleation growth mechanism, they both presented irregular shape, distributed randomly in the matrix. The elastic field produced by the lattice mismatch between the precipitates and the matrix has a strong influence on the late precipitation process. D0(22) and L1(2) phases showed anisotropic characteristic, and their precipitates presented cuboidal shape and distributed regularly along the elastic "soft" directions ([100] and [001]), the highly preferential selected microstructure was formed during late precipitation process. The growth law was changed in the elastical strain system, there was no linear relationship between the cube of the average precipitate size and the ageing time as predicted by the classical Lifshitz-Slyozov-Wagner theory.
引用
收藏
页码：2099 / 2103
页数：5
相关论文
共 16 条
  • [1] Theoretical and experimental study of the influence of Cr on the γ+γ′ phase field boundary in the Ni-Al-Cr system
    Broz, P
    Svoboda, M
    Bursík, J
    Kroupa, A
    Havránková, J
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 325 (1-2): : 59 - 65
  • [2] A COMPUTER-SIMULATION TECHNIQUE FOR SPINODAL DECOMPOSITION AND ORDERING IN TERNARY-SYSTEMS
    CHEN, LQ
    [J]. SCRIPTA METALLURGICA ET MATERIALIA, 1993, 29 (05): : 683 - 688
  • [3] PARTITION OF ALLOYING ELEMENTS BETWEEN GAMMA-(A1), GAMMA(')-(L12), AND BETA-(B2) PHASES IN NI-AL BASE SYSTEMS
    JIA, CC
    ISHIDA, K
    NISHIZAWA, T
    [J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1994, 25 (03): : 473 - 485
  • [4] Khachaturyan AG, 1983, THEORY STRUCTURAL TR, P23
  • [5] Recent developments and the future of computational science on microstructure formation
    Miyazaki, T
    [J]. MATERIALS TRANSACTIONS, 2002, 43 (06) : 1266 - 1272
  • [6] Computer simulations of the phase transformation in real alloy systems based on the phase field method
    Miyazaki, T
    Koyama, T
    Kozakai, T
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2001, 312 (1-2): : 38 - 49
  • [7] ALLOYING BEHAVIOR OF NI3AL, NI3GA, NI3SI AND NI3GE
    OCHIAI, S
    OYA, Y
    SUZUKI, T
    [J]. ACTA METALLURGICA, 1984, 32 (02): : 289 - 298
  • [8] Large-scale simulations of phase separation of elastically coherent binary alloy systems
    Orlikowski, D
    Sagui, C
    Somoza, A
    Roland, C
    [J]. PHYSICAL REVIEW B, 1999, 59 (13) : 8646 - 8659
  • [9] Ordering and phase separation in Ni-Cr-Al: Monte Carlo simulations vs three-dimensional atom probe
    Pareige, C
    Soisson, F
    Martin, G
    Blavette, D
    [J]. ACTA MATERIALIA, 1999, 47 (06) : 1889 - 1899
  • [10] Ordering and phase separation in low supersaturated Ni-Cr-Al alloys: 3D atom probe and Monte Carlo simulation
    Pareige-Schmuck, C
    Soisson, F
    Blavette, D
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1998, 250 (01): : 99 - 103
12