Phase field simulation of morphology evolution and coarsening of γ′ intermetallic phase in Ni-Al alloy

被引：4

作者：

Cheng, X. -L. ^{[1
]}

Li, Y. -S. ^{[1
]}

Zhang, L. ^{[1
]}

Zhu, H. ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Engn Res Ctr Mat Behav & Design, Minist Educ, Nanjing 210094, Jiangsu, Peoples R China

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2013年 / 29卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Microstructure; Coarsening; Ni-Al alloy; Phase field; PRECIPITATION; MODEL; BEHAVIOR; KINETICS; GROWTH; SHAPE; MO;

D O I：

10.1179/1743284712Y.0000000159

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The morphology evolution and coarsening behaviour of gamma ' (Ni3Al) phase in Ni-Al alloys were investigated by using the Cahn-Hilliard and Ginzberg-Laudan phase field equations, and the composition, order parameter and average particles size evolution coupling with the internal elastic strain were studied. Cubic gamma ' phase was presented firstly and then the rectangle particles were formed by means of coarsening; the mechanisms of gamma ' phase coarsening are Ostwald ripening or coalescence of neighbouring particles. The average particle size of gamma ' phase increases rapidly at the initial stage, and it slows down at the coarsening dominated stage. The average particle size follows a cubic law of 'Lifshitz-Slyozov' encounter modified theory in the coarsening regime.

引用

页码：364 / 369

页数：6

共 27 条

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