Cleavage fracture model for granular bainite in simulated coarse-grained heat-affected zones of high-strength low-alloyed steels

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	Cleavage fracture model for granular bainite in simulated coarse-grained heat-affected zones of high-strength low-alloyed steels
	D. W. Tian; L. P. Karjalainen; B. N. Qian; X. F. Chen
	1997
发表期刊	Jsme International Journal Series a-Solid Mechanics and Material Engineering
ISSN	1340-8046
卷号	40 期号:2 页码:179-188
摘要	A model of cleavage fracture in granular bainite was developed. It involves two-dimensional elastic interaction between a main crack and multiple microcracks induced by the existence of martensite-austenite (M-A) particles in front of the main crack. A factor of fracture toughness reduction due to the presence of M-A particles (f(MA)) was introduced to describe the effect of M-A particles on the stress intensity factor at the tip of the main crack. The values of f(MA) can be expressed as the inverse of the amplification coefficient of the stress intensity factor as a result from the interference between microcracks and a main crack in brittle materials. An equation was derived which describes the relationship between fracture toughness and microstructural variables, including the influence of the effective grain size as well as the average width and interspacing of M-A particles. Moreover, simple linear regression equations were used to check the validation of the present model for predicting cleavage fracture toughness in simulated coarse-grained heat-affected zones of quenched and tempered high-strength low-alloyed steels.
部门归属	acad sinica,inst met res,shenyang 110015,peoples r china.;tian, dw (reprint author), univ oulu,dept mech engn,mat engn lab,pob 440,fin-90571 oulu,finland
关键词	Cleavage Fracture Granular Bainite Cghaz Hsla Steels Martensite-austenite Particles Toughness Phase Steels Microstructure Deformation Toughness Behavior Metals Welds Crack
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/38115
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	D. W. Tian,L. P. Karjalainen,B. N. Qian,et al. Cleavage fracture model for granular bainite in simulated coarse-grained heat-affected zones of high-strength low-alloyed steels[J]. Jsme International Journal Series a-Solid Mechanics and Material Engineering,1997,40(2):179-188.
APA	D. W. Tian,L. P. Karjalainen,B. N. Qian,&X. F. Chen.(1997).Cleavage fracture model for granular bainite in simulated coarse-grained heat-affected zones of high-strength low-alloyed steels.Jsme International Journal Series a-Solid Mechanics and Material Engineering,40(2),179-188.
MLA	D. W. Tian,et al."Cleavage fracture model for granular bainite in simulated coarse-grained heat-affected zones of high-strength low-alloyed steels".Jsme International Journal Series a-Solid Mechanics and Material Engineering 40.2(1997):179-188.