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Thermal Fatigue Behaviour of Cast Iron Induced by Pulse Laser Heating: Numerical Simulation and Experimental Studies
Liu H(刘昊); Chen PJ(陈培君); Hao JB; Yang HF; He XL(何秀丽); Yu G(虞钢)
Source PublicationLASERS IN ENGINEERING
2018
Volume41Issue:1-3Pages:111-128
ISSN0898-1507
Abstract

Thermal fatigue is one of the key damage mechanisms in components suffering high temperature cycles. To shorten the duration of a thermal fatigue test and improve its reliability, apparatus was designed using a laser as the heat source, considering the good controllability and high energy density of a laser in both time and space. The temperature and stress fields induced by a laser under high temperature cycling were investigated by a coupled thermo-mechanical finite element method (FEM) model. Results show that, under the cyclic action of the laser, pulse compressive stresses were produced and were non-uniformly distributed on the cast iron surface, providing essential conditions for cracking. After 1000 thermal cycles. network cracks occurred on the surface area irradiated by the laser. It is believed that the cracks initiated from holes formed by the spalling of graphite, and propagated to connect with each other under the effects of the pulsed compressive stresses.

KeywordNd:YAG laser cast iron cracking thermal fatigue temperature field numerical model finite element method (FEM)
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000445401900007
WOS KeywordBIOMIMETIC NONSMOOTH SURFACE ; HIGH-POWER LASER ; TOOL STEEL ; DIE STEEL ; RESISTANCE ; TEMPERATURE ; ALLOYS
WOS Research AreaMaterials Science, Multidisciplinary ; Optics
WOS SubjectMaterials Science ; Optics
Funding OrganizationFundamental Research Funds for the Central Universities [2017QNA18] ; Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
ClassificationQ4
Ranking1
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/77955
Collection先进制造工艺力学重点实验室
Affiliation1.[Liu, H.
2.Hao, J-B.
3.Yang, H-F.] China Univ Min & Technol, Sch Mech & Elect Engn, Xuzhou 221116, Jiangsu, Peoples R China
4.[Liu, H.] China Univ Min & Technol, Jiangsu Key Lab Mine Mech & Elect Equipment, Xuzhou 221116, Jiangsu, Peoples R China
5.[Chen, P-J.] China Univ Min & Technol, Sch Mech & Civil Engn, Xuzhou 221116, Jiangsu, Peoples R China
6.[He, X-L.
7.Yu, G.] Chinese Acad Sci, Inst Mech, Key Lab Mech Adv Mfg, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Liu H,Chen PJ,Hao JB,et al. Thermal Fatigue Behaviour of Cast Iron Induced by Pulse Laser Heating: Numerical Simulation and Experimental Studies[J]. LASERS IN ENGINEERING,2018,41(1-3):111-128.
APA Liu H,Chen PJ,Hao JB,Yang HF,He XL,&Yu G.(2018).Thermal Fatigue Behaviour of Cast Iron Induced by Pulse Laser Heating: Numerical Simulation and Experimental Studies.LASERS IN ENGINEERING,41(1-3),111-128.
MLA Liu H,et al."Thermal Fatigue Behaviour of Cast Iron Induced by Pulse Laser Heating: Numerical Simulation and Experimental Studies".LASERS IN ENGINEERING 41.1-3(2018):111-128.
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