The Effect of Temperature and Misfit on γ′ Precipitation in Co-Ti Alloys: Phase-Field Modeling and Experiments

被引：2

作者：

Wang, Cuiping ^{[1
,2
]}

Huang, Jianhong ^{[1
,2
]}

Kong, Hufan ^{[1
,2
]}

Lu, Yong ^{[1
,2
]}

Liu, Xingjun ^{[1
,2
,3
,4
]}

机构：

[1] Xiamen Univ, Coll Mat, Xiamen 361005, Fujian, Peoples R China

[2] Xiamen Univ, Fujian Prov Key Lab Mat Genome, Xiamen 361005, Fujian, Peoples R China

[3] Harbin Inst Technol, Inst Mat Genome & Big Data, Shenzhen 518055, Guangdong, Peoples R China

[4] Harbin Inst Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China

来源：

JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION | 2020年 / 41卷 / 01期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

coarsening behaviors; Co-Ti alloys; misfit; phase-field simulation; temperature; MECHANICAL-PROPERTIES; BASE SUPERALLOYS; EVOLUTION; TRANSFORMATION; DEFORMATION; STRENGTH; KINETICS; BEHAVIOR; ELEMENTS; CREEP;

D O I：

10.1007/s11669-019-00775-3

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 effect of temperature and misfit on the coarsening behaviors of gamma ' phase in the Co-12.5Ti alloy is studied by means of experimental observations and phase-field simulation. The experimental and simulated results show that the morphologies of gamma ' phase evolve from spherical shape to rectangle shape as the aging time increases. Additionally, the average inter-precipitate distance increases with the temperature rises. Both the mean particle sizes and aspect ratio are increasing with the increasing of the temperature and misfit. The coarsening rate of gamma ' phase obtained from simulations is 1.37 and 6.48 nm(3)/min for 700 and 750 degrees C, respectively, which is close to the results obtained from experiments. The coarsening rate of gamma ' phase reduces as the misfit decreases at 750 degrees C. The simulation results are in good agreement with the experimental results.

引用

页码：15 / 26

页数：12

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