Precipitation evolution in Cux[Ni3Cr1] spinodal alloys under mismatch control

doi:10.1016/j.matchemphys.2018.11.035

CORC > 兰州理工大学 > 兰州理工大学

	Precipitation evolution in Cux[Ni3Cr1] spinodal alloys under mismatch control
	Li, X. N.1; Li, Z. M.1; Cheng, X. T.1; Sun, W.1; Zheng, Y. H.2; Yu, Q. X.1; Wang, C. Y.1; Wang, Q.1; Dong, C.1
刊名	Materials Chemistry and Physics
	2019-02-01
卷号	223 页码:486-493
关键词	Chromium alloys Copper alloys Corrosion resistance Corrosion resistant alloys Grain boundaries Microstructure Morphology Precipitation (chemical) Strengthening (metal) Composition ranges Decomposition phasis High packing density Mechanical performance Micro-structure evolutions Mismatch Service conditions Solid-solution state
ISSN号	02540584
DOI	10.1016/j.matchemphys.2018.11.035
英文摘要	Cu–Ni–Cr alloys have a typical spinodal decomposition structure. However, a systematic investigation of the correlation between the mismatch of the two decomposition phases, Cu-rich (γ1) and Ni-rich (γ2), and the γ2 morphology is lacking. In this study, the microstructure evolution of Cux[Ni3Cr1] (x = 1, 2, 3, 4, 5, 7, 9, and 12) alloys was investigated over a wide composition range. The results show that mismatch significantly affects the shape of the γ2 precipitates. The γ2 phase is cubic when the mismatch degree (η) is in the range 0.62%–0.75% and lath-shaped when η is in the range 1.08%–1.35%. With increasing Cu content, the proportion of the lath-shaped γ2 phase decreases and that of the cubic γ2 phase continuously increases. Cubic precipitates enhance the alloy strength, while lath-shaped precipitates show better corrosion resistance owing to their high packing density. Therefore, an appropriate x can be chosen according to the actual service conditions. In addition, the Cr state affects the microstructure and performance of the alloys. Cr in the solid solution state promotes spinodal decomposition, while a large amount of Cr-rich precipitates at the grain boundaries has a negative effect on the mechanical performance. © 2018 Elsevier B.V.
资助项目	Fundamental Research Funds for the Central Universities[DUT17LAB09]
WOS研究方向	Materials Science
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000456902400062
状态	已发表
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114239]
专题	兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Li, X. N.
作者单位	1.Dalian Univ Technol, Key Lab Mat Modificat Laser Ion & Electron Beams, Minist Educ, Dalian 116024, Peoples R China 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Li, X. N.,Li, Z. M.,Cheng, X. T.,et al. Precipitation evolution in Cux[Ni3Cr1] spinodal alloys under mismatch control[J]. Materials Chemistry and Physics,2019,223:486-493.
APA	Li, X. N..,Li, Z. M..,Cheng, X. T..,Sun, W..,Zheng, Y. H..,...&Dong, C..(2019).Precipitation evolution in Cux[Ni3Cr1] spinodal alloys under mismatch control.Materials Chemistry and Physics,223,486-493.
MLA	Li, X. N.,et al."Precipitation evolution in Cux[Ni3Cr1] spinodal alloys under mismatch control".Materials Chemistry and Physics 223(2019):486-493.