Microstructure and microhardness of pearlitic steel after laser shock processing and annealing

IMR OpenIR

	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
发表期刊	MATERIALS SCIENCE AND TECHNOLOGY
ISSN	0267-0836
卷号	31 期号:15 页码:1825-1831
摘要	The 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.
部门归属	[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
关键词	Laser Shock Processing High Carbon Pearlitic Steel Microstructure Microhardness
资助者	National 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]
收录类别	sci
语种	英语
WOS记录号	WOS:000368801100004
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/74979
专题	中国科学院金属研究所
通讯作者	xy_hbdy@163.com
推荐引用方式 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.