Experimental study of microstructure changes due to low cycle fatigue of a steel nanocrystallised by Surface Mechanical Attrition Treatment (SMAT)

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• 作者：Z. Sun^a ; D. Retraint^a ; ^{delphine.retraint@utt.fr} ; T. Baudin^b ; A.L. Helbert^b ; F. Brisset^b ; M. Chemkhi^a ; J. Zhou^a ; P. Kanouté ; ^a ; ^c
• 关键词：SMAT ; Nanostructured material ; Low cycle fatigue ; EBSD ; Plastic deformation
• 刊名：Materials Characterization
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：124
• 期：Complete
• 页码：117-121
• 全文大小：1071 K
• 卷排序：124

文摘

LCF tests are carried out on specimens processed by SMAT. EBSD is used to investigate microstructural changes induced by LCF. A grain size gradient is generated by SMAT from surface to the bulk of the fatigue samples. New slip systems are activated by LCF and GOS is increased in plastically deformed region. However, these phenomena are not observed in the top surface ultra-fine grain area.