Phase-field simulation of competitive growth of grains in a binary alloy during directional solidification

doi:10.1007/s41230-018-8020-7

	Phase-field simulation of competitive growth of grains in a binary alloy during directional solidification
	Feng, Li 1,2; Gao, Ya-long 1; Lu, Ni-ni 1; Zhu, Chang-sheng 2; An, Guo-sheng 1,2; Zhong, Jun-he 1
刊名	CHINA FOUNDRY
	2018-09
卷号	15 期号:5 页码:333-342
关键词	phase-field method binary alloy directional solidification different planes competitive growth
ISSN号	1672-6421
DOI	10.1007/s41230-018-8020-7
英文摘要	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.
资助项目	National Natural Science Foundation of China[11504149][11364024][51661020]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SPRINGER SINGAPORE PTE LTD
WOS记录号	WOS:000445241600002
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32476]
专题	材料科学与工程学院计算机与通信学院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	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
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.