New Insights into the Aging Embrittlement Mechanism of 30Cr2Ni4MoV Steel Containing Si and Mn

IMR OpenIR

	New Insights into the Aging Embrittlement Mechanism of 30Cr2Ni4MoV Steel Containing Si and Mn
	Zheng Yongfeng; Hu Xiaofeng; Jiang Haichang; Rong Lijian
	2024
发表期刊	ACTA METALLURGICA SINICA(ENGLISH LETTERS)
ISSN	1006-7191
卷号	37 期号:12 页码:2163-2169
摘要	The aging embrittlement of 30Cr2Ni4MoV steel during service at high temperature has been attributed to the segregation of Si and Mn at grain boundary (GB). We report an alternative mechanism of aging embrittlement of 30Cr2Ni4MoV steel. Using atom probe tomography, it is found that the quenched and tempered (QT) 30Cr2Ni4MoV steel has already contained obvious Si and Mn segregations at GB, which means that the Si and Mn segregations at GB are not sufficient to induce aging embrittlement. It is discovered for the first time in aged 30Cr2Ni4MoV there newly precipitate many G-phases along GB, and Si and Mn segregations at GB of QT30Cr2Ni4MoV steel are the main reason for the precipitation of G-phase. The hard and brittle G-phase helps to promote crack initiation during impact deformation. Subsequently, the cracks can rapidly propagate along GB due to the distribution of G-phase and the segregation of Si and Mn along the GB, which leads to intergranular cracking and low impact energy as for aged 30Cr2Ni4MoV steel.
关键词	30Cr2Ni4MoV steel Aging embrittlement Si and Mn Grain boundary segregation G-phase
语种	英语
WOS记录号	WOS:001296523300003
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/179706
专题	中国科学院金属研究所
作者单位	中国科学院金属研究所
推荐引用方式 GB/T 7714	Zheng Yongfeng,Hu Xiaofeng,Jiang Haichang,et al. New Insights into the Aging Embrittlement Mechanism of 30Cr2Ni4MoV Steel Containing Si and Mn[J]. ACTA METALLURGICA SINICA(ENGLISH LETTERS),2024,37(12):2163-2169.
APA	Zheng Yongfeng,Hu Xiaofeng,Jiang Haichang,&Rong Lijian.(2024).New Insights into the Aging Embrittlement Mechanism of 30Cr2Ni4MoV Steel Containing Si and Mn.ACTA METALLURGICA SINICA(ENGLISH LETTERS),37(12),2163-2169.
MLA	Zheng Yongfeng,et al."New Insights into the Aging Embrittlement Mechanism of 30Cr2Ni4MoV Steel Containing Si and Mn".ACTA METALLURGICA SINICA(ENGLISH LETTERS) 37.12(2024):2163-2169.