Effect of Carbon Reduction on the Toughness of 9CrWVTaN Steels

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	Effect of Carbon Reduction on the Toughness of 9CrWVTaN Steels
	W. Yan ; P. Hu ; L. F. Deng ; W. Wang ; W. Sha ; Y. Y. Shan ; K. Yang
刊名	Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
	2012
卷号	43A 期号:6 页码:1921-1933
关键词	activation ferritic/martensitic steels research-and-development v stainless-steels mechanical-properties martensitic steels ods-eurofer ferritic steels creep-behavior 9cr steel microstructure
ISSN号	1073-5623
中文摘要	Nitride-strengthened, reduced activation, martensitic steel is anticipated to have higher creep strength because of the remarkable thermal stability of nitrides. Two nitride-strengthened, reduced activation martensitic steels with different carbon contents were prepared to investigate the microstructure and mechanical property changes with decreasing carbon content. It has been found that both steels had the microstructure of full martensite with fine nitrides dispersed homogeneously in the matrix and displayed extremely high strength but poor toughness. Compared with the steel with low carbon content (0.005 pct in wt pct), the steel with high carbon content (0.012 pct in wt pct) had not only the higher strength but also the higher impact toughness and grain coarsening temperature, which was related to the carbon content. On the one hand, carbon reduction led to Ta-rich inclusions; on the other hand, the grain grew larger when normalized at high temperature because of the absence of Ta carbonitrides, which would decrease impact toughness. The complicated Al2O3 inclusions in the two steels have been revealed to be responsible for the initiated cleavage fracture by acting as the critical cracks.
原文出处	://WOS:000303457000020
公开日期	2013-02-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/60386]
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	W. Yan,P. Hu,L. F. Deng,et al. Effect of Carbon Reduction on the Toughness of 9CrWVTaN Steels[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,2012,43A(6):1921-1933.
APA	W. Yan.,P. Hu.,L. F. Deng.,W. Wang.,W. Sha.,...&K. Yang.(2012).Effect of Carbon Reduction on the Toughness of 9CrWVTaN Steels.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,43A(6),1921-1933.
MLA	W. Yan,et al."Effect of Carbon Reduction on the Toughness of 9CrWVTaN Steels".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 43A.6(2012):1921-1933.