Phase-field simulation of competitive growth of grains in a binary alloy during directional solidification
Feng, Li1,2; Gao, Ya-long1; Lu, Ni-ni1; Zhu, Chang-sheng2; An, Guo-sheng1,2; Zhong, Jun-he1
2018-09
发表期刊CHINA FOUNDRY
ISSN1672-6421
卷号15期号:5页码:333-342
摘要Taking Al-2%mole-Cu binary alloy as an example, the influence of grain orientation on competitive growth of dendrites under different competitive modes was investigated by using the three-dimensional (3-D) phase-field method. The result of phase-field simulation was verified by applying cold spray and directional remelting. In the simulation process, two competitive modes were designed: in Scheme 1, the monolayer columnar grains in multilayer columnar crystals had different orientations; while in Scheme 2, they had the same orientation. The simulation result showed that in Scheme 1, the growth of the dendrites, whose orientation had a certain included angle with the direction of temperature gradient, was restrained by the growth of other dendrites whose direction was parallel to the direction of temperature gradient. Moreover, the larger the included angle between the grain orientation and temperature gradient, the earlier the cessation of dendrite growth. The secondary dendrites of dendrites whose grain orientation was parallel to the temperature gradient flourished with increasing included angles between the grain orientation and temperature gradient. In Scheme 2, the greater the included angle between grain orientation and temperature gradient, the easier the dendrites whose orientation showed a certain included angle with temperature gradient inserted between those grew parallel to the temperature gradient, and the better the growth condition thereafter. Some growing dendrites after intercalation were deflected to the temperature gradient, and the greater the included angle, the lower the deflection. The morphologies of the competitive growth dendrites obtained through simulation can also be found in metallographs of practical solidification experiments. This implies that the two modes of competitive growth of dendrites characterized in the simulation do exist and frequently appear in practical solidification processes.
关键词phase-field method binary alloy directional solidification different planes competitive growth
DOI10.1007/s41230-018-8020-7
收录类别SCI ; SCIE
语种英语
资助项目National Natural Science Foundation of China[11504149][11364024][51661020]
WOS研究方向Metallurgy & Metallurgical Engineering
WOS类目Metallurgy & Metallurgical Engineering
WOS记录号WOS:000445241600002
出版者SPRINGER SINGAPORE PTE LTD
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符https://ir.lut.edu.cn/handle/2XXMBERH/32476
专题省部共建有色金属先进加工与再利用国家重点实验室
材料科学与工程学院
计算机与通信学院
通讯作者Feng, Li
作者单位1.Lanzhou Univ Technol, Coll Mat & Engn, Lanzhou 730050, Gansu, Peoples R China;
2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China
第一作者单位兰州理工大学;  省部共建有色金属先进加工与再利用国家重点实验室
通讯作者单位兰州理工大学;  省部共建有色金属先进加工与再利用国家重点实验室
第一作者的第一单位兰州理工大学
推荐引用方式
GB/T 7714
Feng, Li,Gao, Ya-long,Lu, Ni-ni,et al. Phase-field simulation of competitive growth of grains in a binary alloy during directional solidification[J]. CHINA FOUNDRY,2018,15(5):333-342.
APA Feng, Li,Gao, Ya-long,Lu, Ni-ni,Zhu, Chang-sheng,An, Guo-sheng,&Zhong, Jun-he.(2018).Phase-field simulation of competitive growth of grains in a binary alloy during directional solidification.CHINA FOUNDRY,15(5),333-342.
MLA Feng, Li,et al."Phase-field simulation of competitive growth of grains in a binary alloy during directional solidification".CHINA FOUNDRY 15.5(2018):333-342.
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