CAS OpenIR  > 中科院上海应用物理研究所2011-2018年
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
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume34Issue:7Pages:1142-1148
Subtype期刊论文
AbstractThe 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.
KeywordDirectional Solidification Ni-alloys Cu Alloy Evolution Growth Tomography Convection Interface Transport
DOI10.1016/j.jmst.2017.11.047
Indexed BySCI
Language英语
WOS IDWOS:000434132800011
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/28978
Collection中科院上海应用物理研究所2011-2018年
Affiliation1.Wang, YB
2.Peng, LM
3.Ji, YZ
4.Chen, XX
5.Wang, CL
6.Wu, YJ
7.Fu, YA
8.Chen, LQ
Recommended Citation
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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