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Collective evolution of surface microcrack for compacted graphite iron under thermal fatigue with variable amplitude
Pan SN(潘斯宁); Yu G(虞钢); He XL(何秀丽); Li SX(李少霞); Zhang Y(张越); Li QY(李清羽)
Source PublicationINTERNATIONAL JOURNAL OF FATIGUE
2019
Volume118Pages:139-149
ISSN0142-1123
AbstractWith the growing demand of good performance and high reliability of the heated components, the cracking failure caused by the complex thermal loading of variable amplitude has become a crucial problem. The collective evolution of surface microcrack for compacted graphite iron under thermal fatigue with variable amplitude is studied in this paper, which is induced by pulsed laser. The thermal microcrack is analyzed with statistic method and fractal method systematically. The result shows that, the secondary microcrack is the primary crack pattern, and the number of main microcrack is the least. As the test goes on, the fractal dimension increases following the Hill's function. Furthermore, the effect of maximum temperature T-max and superimposed number N-HCP on the crack evolution is investigated. T-max in the heating stage mainly affects the number of main microcrack. With the increase of plastic strain amplitude, the fractal dimension increases exponentially, and gradually tends to be the critical fractal dimension D-o of 1.395. The superimposed number N-HCP in the high-cycle stage mainly affects the number of secondary microcrack. The fractal dimension increases exponentially with the increase of N-HCP, and tends to be the critical fractal dimension D-o of 1.404. The analysis of the collective behavior of surface microcrack is helpful for evaluating the damage degree and predicting the lifetime, which can be applied to other materials working under thermal loading of variable amplitude.
KeywordThermal fatigue Variable amplitude Surface microcrack Collective evolution Compacted graphite iron
DOI10.1016/j.ijfatigue.2018.09.005
Indexed BySCI ; EI
Language英语
WOS IDWOS:000449245700014
WOS KeywordHIGH-POWER LASER ; NUMERICAL-SIMULATION ; FRACTAL ANALYSIS ; CRACK GROWTH ; PROPERTY ; STEEL
WOS Research AreaEngineering, Mechanical ; Materials Science, Multidisciplinary
WOS SubjectEngineering ; Materials Science
Funding OrganizationNational Natural Science Foundation of China [11272316, 11502269, 11672304, 11272317] ; Chinese Academy of Sciences [yz201636]
Classification一类
Ranking1
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78474
Collection先进制造工艺力学重点实验室
Affiliation1.{Pan, Sining、Yu, Gang、He, Xiuli、Li, Shaoxia、Zhang, Yue、Li, Qingyu} Chinese Acad Sci, Inst Mech, Beijing, Peoples R China
2.{Pan, Sining、Yu, Gang、He, Xiuli、Zhang, Yue、Li, Qingyu} Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China
3.{Pan, Sining} Hezhou Univ, Coll Mech & Elect Engn, Hezhou Shi, Guangxi Zhuangz, Peoples R China
Recommended Citation
GB/T 7714
Pan SN,Yu G,He XL,et al. Collective evolution of surface microcrack for compacted graphite iron under thermal fatigue with variable amplitude[J]. INTERNATIONAL JOURNAL OF FATIGUE,2019,118:139-149.
APA 潘斯宁,虞钢,何秀丽,李少霞,张越,&李清羽.(2019).Collective evolution of surface microcrack for compacted graphite iron under thermal fatigue with variable amplitude.INTERNATIONAL JOURNAL OF FATIGUE,118,139-149.
MLA 潘斯宁,et al."Collective evolution of surface microcrack for compacted graphite iron under thermal fatigue with variable amplitude".INTERNATIONAL JOURNAL OF FATIGUE 118(2019):139-149.
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