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Microstructure and microhardness of pearlitic steel after laser shock processing and annealing
Xiong, Y.; He, T. T.; You, L.; Li, P. Y.; Chen, L. F.; Ren, F. Z.; Volinsky, A. A.; xy_hbdy@163.com
2015
Source PublicationMATERIALS SCIENCE AND TECHNOLOGY
ISSN0267-0836
Volume31Issue:15Pages:1825-1831
AbstractThe microstructure evolution of the high carbon pearlitic steel after laser shock processing (LSP) with different laser pulse energy and high temperature annealing was investigated. After LSP, the cementite lamella were bent, fractured and broken into granules. Fragmentation and dissolution of the cementite lamella were enhanced by increasing the laser pulse energy. Results show that the ferrite lattice parameter increased due to carbon atom dissolution in the ferrite matrix, and the corresponding ferrite X-ray diffraction peaks shifted significantly towards the smaller diffraction angles. After annealing at 6508 degrees C for 30 min, an ultrafine duplex microstructure (ferrite + cementite) was formed on the surface. After LSP with a high energy, equiaxed ferrite grains were refined to 400 nm and the cementite lamella were fully spheroidised with the particle diameter of similar to 150 nm. The corresponding grain size of ferrite and cementite under low pulse energy was 500 and 300 nm respectively. After annealing, the ferrite peaks significantly shifted towards the higher diffraction angles, and the ferrite lattice parameter decreased. The microhardness initially increases after LSP and then slightly decreases after subsequent annealing but remained higher than without LSP.
description.department[xiong, y. ; you, l. ; li, p. y. ; chen, l. f. ; ren, f. z.] henan univ sci & technol, sch mat sci & engn, luoyang 471003, peoples r china ; [xiong, y. ; you, l. ; ren, f. z.] collaborat innovat ctr nonferrous met, luoyang 471003, henan province, peoples r china ; [he, t. t.] chinese acad sci, inst met res, shenyang 110016, peoples r china ; [volinsky, a. a.] univ s florida, dept mech engn, tampa, fl 33620 usa
KeywordLaser Shock Processing High Carbon Pearlitic Steel Microstructure Microhardness
Funding OrganizationNational Natural Science Foundation of China [50801021, 51201061]; Program for the Young Key Teachers in the Henan Province [2011GGJS-070]; Henan Province Program for Science and Technology Innovation Excellent Talents [144200510001]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74979
Collection中国科学院金属研究所
Corresponding Authorxy_hbdy@163.com
Recommended Citation
GB/T 7714
Xiong, Y.,He, T. T.,You, L.,et al. Microstructure and microhardness of pearlitic steel after laser shock processing and annealing[J]. MATERIALS SCIENCE AND TECHNOLOGY,2015,31(15):1825-1831.
APA Xiong, Y..,He, T. T..,You, L..,Li, P. Y..,Chen, L. F..,...&xy_hbdy@163.com.(2015).Microstructure and microhardness of pearlitic steel after laser shock processing and annealing.MATERIALS SCIENCE AND TECHNOLOGY,31(15),1825-1831.
MLA Xiong, Y.,et al."Microstructure and microhardness of pearlitic steel after laser shock processing and annealing".MATERIALS SCIENCE AND TECHNOLOGY 31.15(2015):1825-1831.
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