Investigation on the Influence Mechanism of Mg Contents on the Hot Cracking Behavior of Al-Cu-Mg Alloys

doi:10.1007/s11663-024-03280-2

IMR OpenIR

	Investigation on the Influence Mechanism of Mg Contents on the Hot Cracking Behavior of Al-Cu-Mg Alloys
	Su, Ming 1; Zhou, Minghui 2; Yue, Chunyu 2; Zhou, Lixin 1; Zheng, Wentao 2; Zheng, Bowen 2; Zuo, Xiaojiao 2; Yuan, Xiaoguang 2
通讯作者	Zhou, Lixin(lxzhou@imr.ac.cn) ; Yuan, Xiaoguang(yuanxg@sut.edu.cn)
	2024-11-13
发表期刊	METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
ISSN	1073-5615
页码	20
摘要	The present work focuses on the mechanisms of liquid film feeding and intermetallic compounds interface property in the Mg content of Al-Cu-Mg alloys hot cracking behavior. Experimental results reveal that two types of hot cracking microstructure are observed when the mushy zone of Al-Cu-Mg alloys is constituted of liquid film and spherical solid grains. One type is attributed to the premature formation of a closed region which prevents the feeding of the liquid film and insufficient feeding of the liquid film, while the other is formed due to unstable intermetallic compounds. Combined with multiscale simulation calculations, it is demonstrated that in alloys which hot cracking is induced by the formation of a premature closed zone and insufficient liquid film feeding, the Al-4.0Cu-1.5Mg alloy exhibits the highest residual liquid film feeding volume (Vresidual) value of 5.59 x 104 mu m3, indicating the lowest hot cracking susceptibility. Therefore, in the absence of dendrite bridging effects on hot cracking formation, the mechanism by which grain refinement affects hot cracking is to decrease the solid phase shrinkage volume (Vs) while increasing the liquid film feeding volume (Vfeeding*), thereby reducing the tendency for hot cracking initiation. Furthermore, molecular dynamics (MD) simulation is used to calculate the interface stability of different intermetallic compounds. The results demonstrate that the interfacial separation works for Al2CuMg//Al and Al2CuMg//Al2Cu are 28.805 and 2.849 J/m2, respectively. These values are higher than those for AlCuMg//Al and AlCuMg//Al2Cu (26.939 and 2.473 J/m2), indicating that interfaces with AlCuMg as the matrix are more susceptible to be separated. When the Mg element content exceeds 1.5 wt pct, the formation of the unstable AlCuMg phase increases the sources of hot cracks. The research findings of this work provide design insights and theoretical guidance for development alloys with low hot cracking susceptibility.
资助者	National Natural Science Foundation of China
DOI	10.1007/s11663-024-03280-2
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51875365]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001353860800001
出版者	SPRINGER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/191503
专题	中国科学院金属研究所
通讯作者	Zhou, Lixin; Yuan, Xiaoguang
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Peoples R China
推荐引用方式 GB/T 7714	Su, Ming,Zhou, Minghui,Yue, Chunyu,et al. Investigation on the Influence Mechanism of Mg Contents on the Hot Cracking Behavior of Al-Cu-Mg Alloys[J]. METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE,2024:20.
APA	Su, Ming.,Zhou, Minghui.,Yue, Chunyu.,Zhou, Lixin.,Zheng, Wentao.,...&Yuan, Xiaoguang.(2024).Investigation on the Influence Mechanism of Mg Contents on the Hot Cracking Behavior of Al-Cu-Mg Alloys.METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE,20.
MLA	Su, Ming,et al."Investigation on the Influence Mechanism of Mg Contents on the Hot Cracking Behavior of Al-Cu-Mg Alloys".METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE (2024):20.