Impacts of aging treatments on the microstructural evolutions, mechanical properties and strengthening mechanism in 1Cr15Ni36W3Ti

doi:10.1016/j.jallcom.2020.156510

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	Impacts of aging treatments on the microstructural evolutions, mechanical properties and strengthening mechanism in 1Cr15Ni36W3Ti
	Li, Haoze; Zhang, Weina; Li, Min; Gao, Ming; Ma, Yingche; Liu, Kui
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2020-12-20
卷号	847
DOI	10.1016/j.jallcom.2020.156510
英文摘要	The microstructural evolution, mechanical properties, fracture behaviors and age hardening mechanism in 1Cr15Ni36W3Ti subjected to various thermal treatments involving a preceding solution at 1080 degrees C and three distinct aging schedules were investigated. Upon aging treated at 870 degrees C and then 700 degrees C, discrete globular MC carbides combined with dispersive and fine gamma' particles were formed at grain boundaries and in the gamma matrix, respectively, which is beneficial in resisting the propagation of grain-boundary microcracks and dramatically enhancing yield and ultimate strengths. Rather, the second aging strategy conducted at 730 degrees C after solution resulted in relatively coarse gamma' precipitates and nearly continuous intergranular MC carbides, while the third aging schedule carried out firstly at 780 degrees C and then 730 degrees C led to a dual size of gamma' phase and also a nearly continuous distribution of the grain-boundary MC carbides. Moreover, gamma' denuded zones on both sides of grain boundaries were formed in the latter two aging treatments, which were severer in the third age. The relatively coarse gamma' phase and the appearance of precipitate-free zones dramatically lowered the strength, whereas the nearly continuous intergranular carbides with gamma' denuded zones alongside accelerated the propagation of intergranular micro-cracks. Dislocation shearing was dominated. The gamma' coherency strengthening, the introduction of complex stacking faults in the gamma' phase arising from Shockley partial dislocations shearing and the elimination of gamma' denuded zones were responsible for the highest tensile strength when undergoing the first-type age. (C) 2020 Elsevier B.V. All rights reserved.
WOS记录号	WOS:000573225900010
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/155640]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Li, Haoze,Zhang, Weina,Li, Min,et al. Impacts of aging treatments on the microstructural evolutions, mechanical properties and strengthening mechanism in 1Cr15Ni36W3Ti[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,847.
APA	Li, Haoze,Zhang, Weina,Li, Min,Gao, Ming,Ma, Yingche,&Liu, Kui.(2020).Impacts of aging treatments on the microstructural evolutions, mechanical properties and strengthening mechanism in 1Cr15Ni36W3Ti.JOURNAL OF ALLOYS AND COMPOUNDS,847.
MLA	Li, Haoze,et al."Impacts of aging treatments on the microstructural evolutions, mechanical properties and strengthening mechanism in 1Cr15Ni36W3Ti".JOURNAL OF ALLOYS AND COMPOUNDS 847(2020).