Effects of Nickel Content on Microstructural Evolution and γ' Dissolution of Co-8.8Al-9.8W Base Alloys

	Effects of Nickel Content on Microstructural Evolution and γ' Dissolution of Co-8.8Al-9.8W Base Alloys
	Xu, Yangtao 1,2; Xia, Rongli 1,2; Lou, Dechao 1,2
刊名	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
	2017-08-01
卷号	46 期号:8 页码:2288-2293
关键词	After-heat treatment Aluminum alloys Dissolution Gamma rays Microhardness Microstructural evolution Morphology Nickel Phase transitions Scanning electron microscopy Ternary alloys Tungsten alloys Volume fraction Atomic fractions Dissolution behavior Phase morphology Phase transformation temperature Phase volume fraction Solidus temperature Solvus temperature Two-phase microstructures
ISSN号	1002185X
英文摘要	To study the effects of nickel contents (5%, 15%, 25% and 35%, atomic fraction) on microstructural evolution and γ' dissolution behavior of Co-Al-W base alloys, the γ' phase microstructural evolution, γ' phase transformation temperatures and microhardness of Co-Al-W base alloys with aging treatment were analyzed using scanning-electron microscope (SEM) and X-ray diffraction (XRD) etc. Results show that with the increasing of Ni content, γ' solvus temperature increases at different degrees and the volume fraction of γ' phase increases gradually. When the nickel content in Co-8.8Al-9.8W alloy reaches 25%, γ' phase transformation temperature increases to 1100. The solidus temperatures and γ' phase morphology of the four Co-Al-W base alloys are nearly unchanged. The typical γ/γ' two-phase microstructure is generated in the four alloys after the heat treatment at 900 for 50 h. After aging at 900 for 100 h, the γ' phase volume fraction decreases and the γ' phase is obviously coarsened. The microhardness of the four alloys after heat treatment at 900 for 50 and 100 h indicates that the microhardness is raised from 5Ni alloy to 15Ni alloy, but is lowered when further increasing the Ni content. With the aging treatment time from 50 h to 100 h, the volume fraction of γ' phase decreases and γ' phase coarsens, which reduces the hardness of Co-8.8Al-9.8W-based alloy. © 2017, Science Press. All right reserved.
语种	中文
出版者	Rare Metals Materials and Engineering Press
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114102]
专题	材料科学与工程学院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.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Xu, Yangtao,Xia, Rongli,Lou, Dechao. Effects of Nickel Content on Microstructural Evolution and γ' Dissolution of Co-8.8Al-9.8W Base Alloys[J]. Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,2017,46(8):2288-2293.
APA	Xu, Yangtao,Xia, Rongli,&Lou, Dechao.(2017).Effects of Nickel Content on Microstructural Evolution and γ' Dissolution of Co-8.8Al-9.8W Base Alloys.Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,46(8),2288-2293.
MLA	Xu, Yangtao,et al."Effects of Nickel Content on Microstructural Evolution and γ' Dissolution of Co-8.8Al-9.8W Base Alloys".Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering 46.8(2017):2288-2293.