Effect of cooling rates on the dendritic morphology transition of Mg-6Gd alloy by in situ X-ray radiography
Wang, YB; Peng, LM; Ji, YZ; Chen, XX; Wang, CL; Wu, YJ; Fu, YA; Chen, LQ
2018
发表期刊JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
卷号34期号:7页码:1142-1148
文章类型期刊论文
摘要The effect of cooling rate on the transition of dendrite morphology of a Mg-6Gd (wt%) alloy was semiquantitatively analyzed under a constant temperature gradient by using synchrotron X-ray radiographic technique. Results show that equiaxed dendrites, including exotic 'butterfly-shaped' dendrite morphology, dominate at high cooling rate (>1 K/s). When the cooling rate decreases in the range of 0.5-1 K/s, the equiaxed-to-columnar transition takes place, and solute segregates at the center of two long dendrite arms (LDA) of the 'butterfly-shaped' dendrite. When the cooling rate is lower than 0.3 K/s, directional solidification occurs and the columnar dendritic growth direction gradually rotates from the crystalline axis to the thermal gradient direction with an increase in cooling rate. Meanwhile, interface moves faster but the dendrite arm spacing decreases. Floating, collision and rotation of dendrites under convection were also studied in this work. (C) 2018 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词Directional Solidification Ni-alloys Cu Alloy Evolution Growth Tomography Convection Interface Transport
DOI10.1016/j.jmst.2017.11.047
收录类别SCI
语种英语
WOS记录号WOS:000434132800011
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28978
专题中科院上海应用物理研究所2011-2018年
作者单位1.Wang, YB
2.Peng, LM
3.Ji, YZ
4.Chen, XX
5.Wang, CL
6.Wu, YJ
7.Fu, YA
8.Chen, LQ
推荐引用方式
GB/T 7714
Wang, YB,Peng, LM,Ji, YZ,et al. Effect of cooling rates on the dendritic morphology transition of Mg-6Gd alloy by in situ X-ray radiography[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2018,34(7):1142-1148.
APA Wang, YB.,Peng, LM.,Ji, YZ.,Chen, XX.,Wang, CL.,...&Chen, LQ.(2018).Effect of cooling rates on the dendritic morphology transition of Mg-6Gd alloy by in situ X-ray radiography.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,34(7),1142-1148.
MLA Wang, YB,et al."Effect of cooling rates on the dendritic morphology transition of Mg-6Gd alloy by in situ X-ray radiography".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 34.7(2018):1142-1148.
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