Acta Metall Sin  2005, Vol. 41 Issue (6): 577-582     DOI:

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Thermal Stability of Structure and Hardness of the Surface Layer of 316L Stainless Steel After Surface Mechanical Attrition Treatment

WANG Aixiang; LIU Gang; ZHOU Lei; WANG Ke; YANG Xiaohua; LI Ying

Shenyang National Laboratory for Materials Science; Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110016；School of Materials Science and Engineering; Fuzhou University; Fuzhou 350002

WANG Aixiang; LIU Gang; ZHOU Lei; WANG Ke; YANG Xiaohua; LI Ying. Thermal Stability of Structure and Hardness of the Surface Layer of 316L Stainless Steel After Surface Mechanical Attrition Treatment. Acta Metall Sin, 2005, 41(6): 577-582 .

Abstract References Related Articles Recommended Metrics Download:  PDF(425KB)  Export:  BibTeX | EndNote (RIS)       Abstract  After surface mechanical attrition treatment (SMAT) for 316L stainless steel, a gradient structure in its surface layer with grain size from nano-scale to micro-scale was obtained. The samples before and after the SMAT were annealed in vacuum at different temperatures for different durations, and the structural evolution as well as the hardness and the residual stress variations along the depth were analyzed. Experimental results show that when the annealing temperature is lower than 0.5Tm(Tm is the melt point), no obvious change can be found for the grain size in the gradient structure, except the martensite transformation in the affected layer due to the release of residual stress, and the hardness distribution along the depth remains unchanged. When the annealing temperature is higher than 0.5Tm, recovery, recrystallization and sharp drop of the residual stress occur in the gradient structure, which induce significant reduction of the hardness along the depth. The effect of annealing duration on the structure and property of the SMAT sample is less important comparing with the annealing temperature. Key words:  316L stainless steel      surface nanocrystallization      annealing       Received:  27 September 2004      ZTFLH:  TG142.71   Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors WANG Aixiang LIU Gang ZHOU Lei WANG Ke YANG Xiaohua LI Ying URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y2005/V41/I6/577 [1]Lu K,Lu J.J Matr Sci Technol,1999;15:193 [2]Lu K,Lu J.Mater Sci Eng,2004;A375-377:38 [3]Wu X,Tao N,Hong Y,Xu B,Lu J,Lu K.Acta Mater,2002;50:2075 [4]Tao N R,Wang Z B,Tong W P,Sui M L,Lu J,Lu K.Acta Mater,2002;50:4603 [5]Zhang H W,Hei Z K,Liu G,Lu J,Lu K.Acta Mater,2003;51:1871 [6]Yong X P,Liu G,Lu K,Lu J.J Mater Sci Technol,2003;19:1 [7]Liu G,Wang S C,Lou X F,Lu J,Lu K.Scr Mater,2001;44:1791 [8]Lu K.Mater Sci Eng,1996;R16:161 [9]Lu A Q,Liu G,Liu C M.Acta Metall Sin,2004;40:943 (吕爱强,刘刚,刘春明．金属学报,2004;40:943) [10]Ya M,Xing Y M,Dai F L,Lu K,Lu J.Surf Coat Technol, 2003;168:148 [11]Olson G B,Cohen M.Metall Trans,1975;6A:791 [12]Lin G Y,Han F,Yu J W,Peng X M,Ye L Y,Peng D S.Heat Treat Met,2004;29(3):8 (林高用,韩飞,余均武,彭小敏,叶凌英,彭大暑．金属热处理,2004;29(3):8) [13]Shewmon P G.Transformation in Metals.New York:McGraw-Hill Book Co.,1969:116 [14]Klement U,Erb U,El Sherik A M,Aust K T.Mater Sci Eng,1995;A203:177 [15]Surganaragana C,Froes F H.Nanostruct Mater,1992;11:196 [16]Lian J S,Valiev R Z,Baudelet B.Acta Metall Mater,1995;43:4165 [17]Inami T,Okuda S,Maeta H,Ohtsuka H.Mater Trans JIM,1998;39:1029 [18]Lu K,Wang J T,Wei W D.J Phys,1992;25D:808 [19]Lu K,Dong Z F,Bakonyi I,Cziraki A.Acta Metall Mater,1995;43:2641 [20]Eckert J,Holzen J C,Johnson W L.J Appl Phys,1993;73:131 [1] CHEN Xueshuang, HUANG Xingmin, LIU Junjie, LV Chao, ZHANG Juan. 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