文献类型：会议论文

英文题名：Surface nanocrystallization of 35# type carbon steel induced by ultrasonic impact treatment (UIT)

作者：Fan, Zhao[1];Xu, Hong[2];Li, Dong[2];Zhang, Li[2];Liao, Libao[2]

机构：[1]State Nucl Power Plant Serv Co, Bldg 6 888 TianlinRd, Shanghai 200233, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

会议论文集：Chinese Materials Conference

会议日期：2011

会议地点：PEOPLES R CHINA

语种：英文

外文关键词：Ultrasonic impact treatment; 35# type carbon steel; Surface nanocrystallization; Hardness

摘要：A nanostructured surface layer was fabricated on 35# type carbon steel plate by using ultrasonic impact treatment (UIT) technique. The micro-structural features of the surface layer produced by UIT were characterized by optical microscopy (OM) observations, X-ray diffraction (XRD) and transmission electron microscopy (TEM), and hardness measurement was carried out in order to examine the hardness variation along the depth. Experimental results showed that the thickness of the plastic deformation layer varies from a few to about 100 mu m depending on the duration of UIT. Obvious grain refinement was observed and the gain size was about 10nm in the top surface layer. After UIT, the micro-hardness of the surface layer was enhanced significantly compared with that of the original sample, and the hardness increased when the duration of UIT increased. (C) 2011 Published by Elsevier Ltd. Selection and peer-review under responsibility of Chinese Materials Research Society.