Effect of cobalt on the mechanical properties of 718 base alloy with 1.2 wt % Al

doi:10.1016/j.jallcom.2022.166817

CORC > 金属研究所 > 中国科学院金属研究所

	Effect of cobalt on the mechanical properties of 718 base alloy with 1.2 wt % Al
	Yao, Xiaoyu 1,2,3; Liu, Fang 2; Liu, Jiaao 2,3; Xin, Xin 2; Qi, Feng 2; Sun, Wenru 2
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2022-12-10
卷号	926 页码:11
关键词	Alloy 718 Cobalt Laves ?' ?? Mechanical properties
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2022.166817
通讯作者	Yao, Xiaoyu(xyyao15s@imr.ac.cn)
英文摘要	In this paper, the effect of Co (0-5 wt%) on the mechanical properties of 718 alloy and its strengthening mechanism were studied to clarify the function of Co on the mechanical properties of 718 base alloy. The experimental results showed that the addition of Co refined the grain. After the heat treatment, the addition of Co promoted the precipitation of Laves phase and gamma ' phase, but inhibited the precipitation of gamma '' phase. With the increasing of the Co content, the tensile strength was increased first and then decreased. It was found that the increase in the tensile strength of the alloy was caused by refining the grains and promoting the intergranular precipitation of the Laves phase. Nevertheless, Co increased the volume fraction of intragranular gamma ' phase, while suppressed the precipitation of intragranular precipitation of gamma '', thus the intragranular strength of the alloy was reduced. Accordingly, the alloy with 3 wt% Co shows the highest yield strength among the experimental alloys. Besides, the Co content extent 3 wt% will show a yield plateau under room temperature tension, but not in the case of 650 degrees C tension. It was revealed by analyzing the TEM morphology of the Laves phase in the room-temperature tensile samples and 650 degrees C tensile samples that the dislocation could shear through the intergranular Laves phase under the 650 degrees C tensile test, but it was not the case under room temperature tensile test. Therefore, the yield plateau in the stress-strain curves is due to the intergranular Laves phase impeding the dislocation motion.(c) 2022 Elsevier B.V. All rights reserved.
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000848442300003
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/175046]
专题	金属研究所_中国科学院金属研究所
通讯作者	Yao, Xiaoyu
作者单位	1.72 Wenhua Rd, Shenyang, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, Coll Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Yao, Xiaoyu,Liu, Fang,Liu, Jiaao,et al. Effect of cobalt on the mechanical properties of 718 base alloy with 1.2 wt % Al[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2022,926:11.
APA	Yao, Xiaoyu,Liu, Fang,Liu, Jiaao,Xin, Xin,Qi, Feng,&Sun, Wenru.(2022).Effect of cobalt on the mechanical properties of 718 base alloy with 1.2 wt % Al.JOURNAL OF ALLOYS AND COMPOUNDS,926,11.
MLA	Yao, Xiaoyu,et al."Effect of cobalt on the mechanical properties of 718 base alloy with 1.2 wt % Al".JOURNAL OF ALLOYS AND COMPOUNDS 926(2022):11.