Cuboidal γ' 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 > 省部共建有色金属先进加工与再利用国家重点实验室

	Cuboidal γ' phase coherent precipitation-strengthened Cu–Ni–Al alloys with high softening temperature
	Li, Z.M.5; Li, X.N.5; Hu, Y.L.5; Zheng, Y.H.3; Yang, M.5; Li, N.J.5; Bi, L.X.5; Liu, R.W.4; Wang, Q.5; Dong, C.5
刊名	Acta Materialia
	2021-01-15
卷号	203
关键词	Aluminum alloys Copper alloys Heat resistance Nickel alloys Comprehensive performance Efficient strategy High melting point Service environment Softening temperature Strengthening mechanisms Temperature-dependent resistivity Three-dimensional reconstruction
ISSN号	1359-6454
DOI	10.1016/j.actamat.2020.10.076
英文摘要	Coherent precipitation of cuboidal γ' 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 γ' 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 γ′ phase. AFM surface current mode and three-dimensional reconstruction of microstructure was performed to determine that γ 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 γ' phase. Comparing to other Cu commercial alloys, cuboidal γ' 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. © 2020 Acta Materialia Inc.
语种	英语
出版者	Acta Materialia Inc
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148363]
专题	省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.CNMC Albetter Albronze Co., Ltd, Linqing; 252600, China 2.School of Materials Science and Engineering, Central South University, Changsha; 410083, China; 3.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 4.Shimadzu China Co. LTD, Shanghai; 200233, China; 5.Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Ministry of Education, Dalian; 116024, China;
推荐引用方式 GB/T 7714	Li, Z.M.,Li, X.N.,Hu, Y.L.,et al. Cuboidal γ' 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 γ' phase coherent precipitation-strengthened Cu–Ni–Al alloys with high softening temperature.Acta Materialia,203.
MLA	Li, Z.M.,et al."Cuboidal γ' phase coherent precipitation-strengthened Cu–Ni–Al alloys with high softening temperature".Acta Materialia 203(2021).