A COMPARISON OF TOUGHNESS OF C-MN STEEL WITH DIFFERENT GRAIN SIZES

doi:10.1007/BF02658058

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	A COMPARISON OF TOUGHNESS OF C-MN STEEL WITH DIFFERENT GRAIN SIZES
	CHEN, JH; YAN, C
刊名	METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
	1992-09
卷号	23 期号:9 页码:2549-2556
ISSN号	0360-2133
DOI	10.1007/BF02658058
英文摘要	The low-temperature toughness of C-Mn weld steel with different grain sizes was investigated with notched and precracked specimens. The results indicated that the fine grain steel, evaluated by notched specimens (Charpy V-notch and 4 point bending specimens), is tougher than that of the coarse grain steel over a temperature range from -196-degrees-C to -30-degrees-C. On the other hand, the coarse grain steel,,evaluated with precracked specimens, has a remarkably greater plane strain fracture toughness compared to the fine grain steel. The microstructural analysis revealed that the fracture toughness of both the fine grain and the coarse grain steel is not directly related to the distance of the fracture initiation site from the precrack tip or the size of the ferrite grain. The behavioral discrepancy can be explained in terms of the ratio of local fracture stress to yield stress, i.e., sigma(f)/sigma(y). The fine grain steel had a higher sigma(f)/sigma(y) in the notched specimens but a lower value in the precracked specimens compared to the coarse grain steel. The scatter of toughness data can be mainly attributed to the probabilistic distribution of the weakest particle. We suggested that sigma(f)/sigma(y) may be a useful parameter for the engineering evaluation of toughness.
WOS研究方向	Materials Science
语种	英语
出版者	MINERALS METALS MATERIALS SOC
WOS记录号	WOS:A1992JM38900025
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/36004]
专题	兰州理工大学
通讯作者	CHEN, JH
推荐引用方式 GB/T 7714	CHEN, JH,YAN, C. A COMPARISON OF TOUGHNESS OF C-MN STEEL WITH DIFFERENT GRAIN SIZES[J]. METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,1992,23(9):2549-2556.
APA	CHEN, JH,&YAN, C.(1992).A COMPARISON OF TOUGHNESS OF C-MN STEEL WITH DIFFERENT GRAIN SIZES.METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,23(9),2549-2556.
MLA	CHEN, JH,et al."A COMPARISON OF TOUGHNESS OF C-MN STEEL WITH DIFFERENT GRAIN SIZES".METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 23.9(1992):2549-2556.