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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)
Corresponding AuthorYu, Gang(gyu@imech.ac.cn)
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
2019-01-25
Volume772Pages:209-217
ISSN0925-8388
AbstractThe 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.
KeywordCu-Cr immiscible alloy Liquid phase separation (LPS) Laser surface melting (LSM) Microstructure
DOI10.1016/j.jallcom.2018.08.012
Indexed BySCI ; EI
Language英语
WOS IDWOS:000449651100026
WOS KeywordLIQUID ; MICROSTRUCTURE ; CHROMIUM ; COPPER
WOS Research AreaChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
Funding OrganizationChinese Academy of Sciences [yz201636] ; National Natural Science Foundation of China [11672304, 11502269, 11272316, 11272317]
Classification一类
Ranking1
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78464
Collection先进制造工艺力学重点实验室
Affiliation1.{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
Recommended Citation
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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