Effect of delta ferrite on impact properties of low carbon 13Cr-4Ni martensitic stainless steel

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	Effect of delta ferrite on impact properties of low carbon 13Cr-4Ni martensitic stainless steel
	P. Wang; S. P. Lu; N. M. Xiao; D. Z. Li; Y. Y. Li
	2010
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	527 期号:13-14 页码:3210-3216
摘要	The effect of delta ferrite on impact properties of low carbon 13Cr-4Ni martensitic stainless steel was studied by instrumented Charpy impact, SEM fractographic analysis and EDS. The experimental results indicated the presence of delta ferrite did not change the upper and lower shelf energy of the steel apparently, while lowered the impact energy remarkably in the transition temperature range and raised the ductile-to-brittle transition temperature of the material. At 0 degrees C, which is in the ductile-to-brittle transition temperature range, the presence of delta ferrite lowered both the crack initiation and propagation energy during the impact progress and changed the fracture mode from dimple to quasi-cleavage as the delta ferrite content increases to 7.8%. It is suggested that in the ductile-to-brittle transition temperature range the cracks are initiated in the soft delta ferrite region, which lowers the maximum load and crack initiation energy. Additionally, when the cracks initiating in delta ferrite extend to the boundaries between the delta ferrite and the matrix, they trigger brittle fracture in the tempered martensite matrix, which decreases the crack propagation energy dramatically. In the upper shelf temperature range, the delta ferrite phase has a good plastic property, which counteracts the deleterious effect caused by its lower strength during the impacting. In the lower shelf temperature range, both delta ferrite and martensite fracture in cleavage mode, thus the presence of delta ferrite cannot change the impact energy significantly. (C) 2010 Elsevier B.V. All rights reserved.
部门归属	[wang, p.; lu, s. p.; xiao, n. m.; li, d. z.; li, y. y.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;li, dz (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;dzli@imr.ac.cn
关键词	Low Carbon Martensitic Stainless Steel Delta Ferrite Impact Properties Fracture Mechanism Weld Metals Phase-transformation Fracture-toughness Microstructure Transition
URL	查看原文
WOS记录号	WOS:000276874700022
引用统计	被引频次：181[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/321006/31505
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	P. Wang,S. P. Lu,N. M. Xiao,et al. Effect of delta ferrite on impact properties of low carbon 13Cr-4Ni martensitic stainless steel[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2010,527(13-14):3210-3216.
APA	P. Wang,S. P. Lu,N. M. Xiao,D. Z. Li,&Y. Y. Li.(2010).Effect of delta ferrite on impact properties of low carbon 13Cr-4Ni martensitic stainless steel.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,527(13-14),3210-3216.
MLA	P. Wang,et al."Effect of delta ferrite on impact properties of low carbon 13Cr-4Ni martensitic stainless steel".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 527.13-14(2010):3210-3216.