Phase separated characteristics affected by cooling rate of immiscible Cu-Cr alloy by laser surface melting

doi:10.1016/j.jallcom.2018.08.012

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	Phase separated characteristics affected by cooling rate of immiscible Cu-Cr alloy by laser surface melting
	Zhang LT(张犁天); Yu G(虞钢); He XL(何秀丽); Li SX(李少霞); Ning WJ(宁伟健); Wang X(王旭)
通讯作者	Yu, Gang(gyu@imech.ac.cn)
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
	2019-01-25
卷号	772 页码:209-217
ISSN	0925-8388
摘要	The effect of cooling rates on the solidified microstructure of Cu-50Cr (wt. %) produced by laser surface melting (LSM) was studied. Layered structure transformed into a dispersed structure when the cooling rate increased from similar to 10(5) K/s to similar to 10(6) K/s. The average diameter of the Cr-rich spheroids in the homogenous layer was reduced to less than 1 mu m, and the migration velocity by Marangoni motion was similar to 10(3) times higher than the velocity by Stokes sedimentation, suggesting that the movements of alpha-Cr droplets containing supersaturated Cu phase during liquid phase separation (LPS) were dominated by Marangoni motion. Although the collisions and coagulations between Cr droplets couldn't be eliminated, the growth was suppressed by high cooling rate. The melt layer presented improved homogenous microhardness and the well-dispersed melt layer exhibited higher withstanding voltage than that of the untreated. (C) 2018 Elsevier B.V. All rights reserved.
关键词	Cu-Cr immiscible alloy Liquid phase separation (LPS) Laser surface melting (LSM) Microstructure
DOI	10.1016/j.jallcom.2018.08.012
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000449651100026
关键词[WOS]	LIQUID ; MICROSTRUCTURE ; CHROMIUM ; COPPER
WOS研究方向	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
项目资助者	Chinese Academy of Sciences [yz201636] ; National Natural Science Foundation of China [11672304, 11502269, 11272316, 11272317]
论文分区	一类
力学所作者排名	1
RpAuthor	Yu, G
引用统计	被引频次：13[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/78464
专题	先进制造工艺力学实验室
作者单位	1.{Zhang, Litian、Yu, Gang、He, Xiuli、Li, Shaoxia、Ning, Weijian、Wang, Xu} Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 2.{Zhang, Litian、Yu, Gang、He, Xiuli、Wang, Xu} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang LT,Yu G,He XL,et al. Phase separated characteristics affected by cooling rate of immiscible Cu-Cr alloy by laser surface melting[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,772:209-217.
APA	张犁天,虞钢,何秀丽,李少霞,宁伟健,&王旭.(2019).Phase separated characteristics affected by cooling rate of immiscible Cu-Cr alloy by laser surface melting.JOURNAL OF ALLOYS AND COMPOUNDS,772,209-217.
MLA	张犁天,et al."Phase separated characteristics affected by cooling rate of immiscible Cu-Cr alloy by laser surface melting".JOURNAL OF ALLOYS AND COMPOUNDS 772(2019):209-217.

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