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Effects of laser pulse energy on surface microstructure and mechanical properties of high carbon steel
Xiong Yi; He Tian-tian; Li Peng-yan; Chen Lu-fei; Ren Feng-zhang; Volinsky, Alex A.; xy_hbdy@163.com
2015
Source PublicationJOURNAL OF CENTRAL SOUTH UNIVERSITY
ISSN2095-2899
Volume22Issue:12Pages:4515-4520
AbstractSurface microstructure and mechanical properties of pearlitic Fe-0.8%C (mass fraction) steel after laser shock processing (LSP) with different laser pulse energies were investigated by scanning electron microscopy(SEM), transmission electron microscopy(TEM), X-ray diffraction(XRD) and microhardness measurements. After LSP, the cementite lamellae were bent, kinked and broken into particles. Fragmentation and dissolution of the cementite lamellae were enhanced by increasing the laser pulse energy. Due to the dissolution of carbon atoms in the ferritic matrix, the lattice parameter of alpha-Fe increased. The grain size of the surface ferrite was refined, and the microstructure changed from lamellae to ultrafine micro-duplex structure (ferrite (alpha)+cementite (theta)) with higher laser pulse energy, accompanied by the residual stress and microhardness increase.
description.department[xiong yi ; li peng-yan ; chen lu-fei ; ren feng-zhang] henan univ sci & technol, sch mat sci & engn, luoyang 471023, peoples r china ; [xiong yi ; ren feng-zhang] collaborat innovat ctr nonferrous met, luoyang 471023, peoples r china ; [he tian-tian] chinese acad sci, inst met res, shenyang 110016, peoples r china ; [volinsky, alex a.] univ s florida, dept mech engn, tampa, fl 33620 usa
KeywordPearlitic Steel Laser Shock Processing Microstructure Microhardness Residual Stress
Funding OrganizationNational Natural Science Foundation of China [50801021, 51201061]; Henan Province Program for Science and Technology Innovation Excellent Talents, China [144200510009]; Science and Technology Project of Henan Province, China [152102210077]; Science and Technology Innovation Team of Henan University of Science and Technology, China [2015XTD006]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74786
Collection中国科学院金属研究所
Corresponding Authorxy_hbdy@163.com
Recommended Citation
GB/T 7714
Xiong Yi,He Tian-tian,Li Peng-yan,et al. Effects of laser pulse energy on surface microstructure and mechanical properties of high carbon steel[J]. JOURNAL OF CENTRAL SOUTH UNIVERSITY,2015,22(12):4515-4520.
APA Xiong Yi.,He Tian-tian.,Li Peng-yan.,Chen Lu-fei.,Ren Feng-zhang.,...&xy_hbdy@163.com.(2015).Effects of laser pulse energy on surface microstructure and mechanical properties of high carbon steel.JOURNAL OF CENTRAL SOUTH UNIVERSITY,22(12),4515-4520.
MLA Xiong Yi,et al."Effects of laser pulse energy on surface microstructure and mechanical properties of high carbon steel".JOURNAL OF CENTRAL SOUTH UNIVERSITY 22.12(2015):4515-4520.
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