Cuboidal gamma ' phase coherent precipitation-strengthened Cu-Ni-Al alloys with high softening temperature

doi:10.1016/j.actamat.2020.10.076

CORC > 兰州理工大学 > 兰州理工大学

	Cuboidal gamma ' phase coherent precipitation-strengthened Cu-Ni-Al alloys with high softening temperature
	Li, Z. M.1; Li, X. N.1; Hu, Y. L.1; Zheng, Y. H.2; Yang, M.1; Li, N. J.1; Bi, L. X.1; Liu, R. W.3; Wang, Q.1; Dong, C.1
刊名	ACTA MATERIALIA
	2021-01-15
卷号	203
关键词	Cu-Ni-Al alloys coherent precipitation mechanical properties conductivity thermal stability
ISSN号	1359-6454
DOI	10.1016/j.actamat.2020.10.076
英文摘要	Coherent precipitation of cuboidal gamma' phase is an efficient strategy to improve high temperature properties in nickel-based alloys. The present work aims to introduce this strengthening mechanism into copper alloys to solve the issue of deficient heat resistance. The results shown that a series of cuboidal gamma' coherent precipitation-strengthened Cu100-y(Ni3/4Al1/4)(y) alloys were obtained in the (Ni+Al) content range of 20 at. % to 50 at. %. These alloys are shown to exhibit excellent comprehensive mechanical properties, high melting point, and a softening temperature of 1273K or more than 1273K. Their hardness and yield strength increased with the rise of temperature, ascribing to splitting of gamma' phase. AFM surface current mode and three-dimensional reconstruction of microstructure was performed to determine that gamma phases remain conductive body in Cu100-y(Ni3/4Al1/4)(y) alloys, and meanwhile temperature-dependent resistivity was characterized and discussed, which showed the improvement of resistivity thermal stability attributing to coherent precipitation of gamma' phase. Comparing to other Cu commercial alloys, cuboidal gamma' phase coherent precipitation-strengthened alloys possess a great potential under high-temperature loads and service environments. In further researches, continued efforts will be required in the multi-component design of Cu100-y(Ni3/4Al1/4)(y) alloys to improve the comprehensive performance. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000600589700008
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148516]
专题	兰州理工大学
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, Peoples R China; 3.Shimadzu China Co LTD, Shanghai 200233, Peoples R China; 4.Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China; 5.CNMC Albetter Albronze Co Ltd, Linqing 252600, Peoples R China
推荐引用方式 GB/T 7714	Li, Z. M.,Li, X. N.,Hu, Y. L.,et al. Cuboidal gamma ' phase coherent precipitation-strengthened Cu-Ni-Al alloys with high softening temperature[J]. ACTA MATERIALIA,2021,203.
APA	Li, Z. M..,Li, X. N..,Hu, Y. L..,Zheng, Y. H..,Yang, M..,...&Zhang, X. W..(2021).Cuboidal gamma ' phase coherent precipitation-strengthened Cu-Ni-Al alloys with high softening temperature.ACTA MATERIALIA,203.
MLA	Li, Z. M.,et al."Cuboidal gamma ' phase coherent precipitation-strengthened Cu-Ni-Al alloys with high softening temperature".ACTA MATERIALIA 203(2021).