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Effects of Y and Addition of Refiners on Hot Tearing Susceptibility of MgZn-Based Alloy
Wei, Z. Q.1; Zhou, Z. J.; Liu, S. M.; Liu, Z.; Wang, Y.
Corresponding AuthorWei, Z. Q.()
2021-04-12
Source PublicationINTERNATIONAL JOURNAL OF METALCASTING
ISSN1939-5981
Pages13
AbstractOn the basis of studying the effect of rare earth elements on hot tearing susceptibility (HTS) of Mg-Zn alloys, further exploring effective ways to reduce HTS of Mg-Zn-Y alloys are very important for the development and application of magnesium alloys. In this paper, the effects of 2 at% Y on HTS of MgZn1 alloy and several grain refiners on HTS of MgZn1Y2 alloy were studied. The modified Clyne-Davies model is used to predict the HTS of the investigated alloys, which are found in the descending order: MgZn1 > MgZn1Y2 > MgZn1Y2-0.5 wt% Na2CO3 > MgZn1Y2-0.5 wt% Ti > MgZn1Y2-0.5 wt% Zr. By means of XRD, SEM, TEM and EBSD, the evolution of the microstructure during solidification is revealed. The results show that the addition of 2 at% Y can not refine alpha-Mg grains, but it can change the precipitation type of the second phase. When the precipitation type of the second phase changes from Mg7Zn3 to Mg12ZnY (LPSO phase) and Mg3Zn3Y2 (W-phase), the solidification end temperature of the alloy increases by more than 100 degrees C, and the coherent lattice of LPSO and alpha-Mg has a better bridging effect on the grain boundary, which reduces the HTS by 28.4%. Moreover, the addition of 0.5 wt% Na2CO3, 0.5 wt% Ti or 0.5 wt% Zr is an effective method for alpha-Mg grain refinement, equiaxation and dendrite coherent delay of MgZn1Y2 alloy. In particular, the addition of 0.5 wt% Zr can reduce the alpha-Mg grain size of MgZn1Y2 alloy by 89.1% and increase the solid fraction by 45% when dendrites are coherent, which results in a 77.1% reduction in HTS.
KeywordMg– Zn– Y alloy grain refinement LPSO precipitation hot tearing susceptibility
Funding OrganizationNational Natural Science Foundation of China ; National key R&D project of China ; Doctoral Scientific Research Foundation of Liaoning Province ; Natural Science Foundation of Liaoning Province ; Shenyang Science and Technology plan 2017 ; Joint Research Fund Liaoning-Shenyang National Laboratory for Materials
DOI10.1007/s40962-021-00591-x
Indexed BySCI
Languageen
Funding ProjectNational Natural Science Foundation of China[51571145] ; National Natural Science Foundation of China[51504153] ; National key R&D project of China[2020yfc2006701] ; Doctoral Scientific Research Foundation of Liaoning Province[20170520033] ; Natural Science Foundation of Liaoning Province[2019-ZD-0210] ; Shenyang Science and Technology plan 2017[17-9-600] ; Joint Research Fund Liaoning-Shenyang National Laboratory for Materials[2019JH3/30100014]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000639652200001
PublisherSPRINGER INTERNATIONAL PUBLISHING AG
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/161946
Collection中国科学院金属研究所
Corresponding AuthorWei, Z. Q.
Affiliation1.Shenyang Univ Technol, Shenyang 110870, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
3.Key Lab Magnesium Alloys & Proc Technol Liaoning, Shenyang 110870, Peoples R China
Recommended Citation
GB/T 7714
Wei, Z. Q.,Zhou, Z. J.,Liu, S. M.,et al. Effects of Y and Addition of Refiners on Hot Tearing Susceptibility of MgZn-Based Alloy[J]. INTERNATIONAL JOURNAL OF METALCASTING,2021:13.
APA Wei, Z. Q.,Zhou, Z. J.,Liu, S. M.,Liu, Z.,&Wang, Y..(2021).Effects of Y and Addition of Refiners on Hot Tearing Susceptibility of MgZn-Based Alloy.INTERNATIONAL JOURNAL OF METALCASTING,13.
MLA Wei, Z. Q.,et al."Effects of Y and Addition of Refiners on Hot Tearing Susceptibility of MgZn-Based Alloy".INTERNATIONAL JOURNAL OF METALCASTING (2021):13.
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