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Fatigue crack-growth rate in ferrite martensite dual-phase steel | |
Deng RY(邓蓉英); Ye ZJ; DENG, RY (reprint author), CHINESE ACAD SCI,INST MECH,BEIJING,PEOPLES R CHINA. | |
发表期刊 | Theoretical and Applied Fracture Mechanics |
1991 | |
卷号 | 16期号:2页码:109-122 |
ISSN | 0167-8442 |
摘要 | An empirical study is made on the fatigue crack growth rate in ferrite-martensite dual-phase (FMDP) steel. Particular attention is given to the effect of ferrite content in the range of 24.2% to 41.5% where good fatigue resistance was found at 33.8%. Variations in ferrite content did not affect the crack growth rate when plotted against the effective stress intensity factor range which was assumed to follow a linear relation with the crack tip stress intensity factor range ΔK. A high corresponds to uniformly distributed small size ferrite and martensite. No other appreciable correlation could be ralated to the microstructure morphology of the FMDP steel. The closure stress intensity factor , however, is affected by the ferrite content with reaching a maximum value of 0.7. In general, crack growth followed the interphase between the martensite and ferrite. Dividing the fatigue crack growth process into Stage I and II where the former would be highly sensitive to changes in ΔK and the latter would increase with ΔK depending on the ratio. The same data when correlated with the strain energy density factor range ΔS showed negligible dependence on mean stress or R ratio for Stage I crack growth. A parameter α involving the ratio of ultimate stress to yield stress, percent reduction of area and R is introduced for Stage II crack growth so that the data for different R would collapse onto a single curve with a narrow scatter band when plotted against αΔS. |
关键词 | Closure Propagation Explanation Roughness Threshold |
DOI | 10.1016/0167-8442(91)90028-I |
URL | 查看原文 |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:A1991GV66100002 |
关键词[WOS] | CLOSURE ; PROPAGATION ; EXPLANATION ; ROUGHNESS ; THRESHOLD |
WOS研究方向 | Engineering ; Mechanics |
WOS类目 | Engineering, Mechanical ; Mechanics |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/39504 |
专题 | 力学所知识产出(1956-2008) |
通讯作者 | DENG, RY (reprint author), CHINESE ACAD SCI,INST MECH,BEIJING,PEOPLES R CHINA. |
推荐引用方式 GB/T 7714 | Deng RY,Ye ZJ,DENG, RY . Fatigue crack-growth rate in ferrite martensite dual-phase steel[J]. Theoretical and Applied Fracture Mechanics,1991,16,2,:109-122. |
APA | Deng RY,Ye ZJ,&DENG, RY .(1991).Fatigue crack-growth rate in ferrite martensite dual-phase steel.Theoretical and Applied Fracture Mechanics,16(2),109-122. |
MLA | Deng RY,et al."Fatigue crack-growth rate in ferrite martensite dual-phase steel".Theoretical and Applied Fracture Mechanics 16.2(1991):109-122. |
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