Effect of La addition on microstructure evolution of hypoeutectic Al-6Si alloys

doi:10.1007/s10853-020-04522-9

IMR OpenIR

	Effect of La addition on microstructure evolution of hypoeutectic Al-6Si alloys
	Zhang, Lili 1; Zheng, Qiuju 1,2; Jiang, Hongxiang 1; He, Jie 1,2; Zhao, Jiuzhou 1,2
通讯作者	Zhang, Lili(llzhang@imr.ac.cn) ; Zhao, Jiuzhou(jzzhao@imr.ac.cn)
	2020-06-01
发表期刊	JOURNAL OF MATERIALS SCIENCE
ISSN	0022-2461
卷号	55 期号:17 页码:7546-7554
摘要	Solidification experiments were carried out for Al-6Si alloys with different La addition levels. The results demonstrate that the average sizes of the alpha-Al grains and the eutectic Si have a tendency of first decreasing and then almost keeping constant with the La addition. About (0.04-0.06) wt% La addition is enough to achieve a satisfactory grain refinement and modification. An analytical model based on the Wilson equation, the Miedema model and the thermodynamics was proposed to investigate the mechanisms of the alpha-Al grain refinement and the eutectic Si modification in the hypoeutectic Al-6Si alloys with the trace La addition. The La effect on the grain refinement of alpha-Al and the modification of the eutectic Si are mainly attributed to the increase in the efficiency of the heterogeneous nucleation substrates to nucleate alpha-Al and the amount of La atoms in the eutectic Si. The grain refinement and the modification results achieve the maximum when the La concentration is near its maximum solid solubility in the primary alpha-Al phase.
DOI	10.1007/s10853-020-04522-9
收录类别	SCI
语种	英语
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000520835700029
出版者	SPRINGER
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/137892
专题	中国科学院金属研究所
通讯作者	Zhang, Lili; Zhao, Jiuzhou
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Lili,Zheng, Qiuju,Jiang, Hongxiang,et al. Effect of La addition on microstructure evolution of hypoeutectic Al-6Si alloys[J]. JOURNAL OF MATERIALS SCIENCE,2020,55(17):7546-7554.
APA	Zhang, Lili,Zheng, Qiuju,Jiang, Hongxiang,He, Jie,&Zhao, Jiuzhou.(2020).Effect of La addition on microstructure evolution of hypoeutectic Al-6Si alloys.JOURNAL OF MATERIALS SCIENCE,55(17),7546-7554.
MLA	Zhang, Lili,et al."Effect of La addition on microstructure evolution of hypoeutectic Al-6Si alloys".JOURNAL OF MATERIALS SCIENCE 55.17(2020):7546-7554.