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Effect of La addition on microstructure evolution of hypoeutectic Al-6Si alloys
Zhang, Lili1; Zheng, Qiuju1,2; Jiang, Hongxiang1; He, Jie1,2; Zhao, Jiuzhou1,2
Corresponding AuthorZhang, Lili(llzhang@imr.ac.cn) ; Zhao, Jiuzhou(jzzhao@imr.ac.cn)
2020-06-01
Source PublicationJOURNAL OF MATERIALS SCIENCE
ISSN0022-2461
Volume55Issue:17Pages:7546-7554
AbstractSolidification 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.
DOI10.1007/s10853-020-04522-9
Indexed BySCI
Language英语
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000520835700029
PublisherSPRINGER
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/137892
Collection中国科学院金属研究所
Corresponding AuthorZhang, Lili; Zhao, Jiuzhou
Affiliation1.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
Recommended Citation
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.
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