Microstructure and Mechanical Property of Nanocrystalline Surface Layer on 7A52 Aluminium Alloy

摘要：

　　Surface nanocrystallization of 7A52 aluminium alloy was realized via non-equilibrium treatment induced by supersonic particles bombarding.Surface morphology and microstucture of the nanocrystalline surface layer were observed and analyzed by SEM,XRD and TEM,respectively.And the micro-hardness was tested using micro-hardness tester.The results indicated that the coarse grains on surface of 7A52 aluminium alloy could be refined to nano-scale via non-equilibrium treatment induced by supersonic particles bombarding.Average grain size on the superficial layer was approximately 40nm,micro-strain was about 0.12~0.14% and the thickness of nanocrystalline surface layer reached to approximately 80μm.Micro-hardness of the nanocrystalline surface layer was about 1.81times to that of the original substrate.

关键词： Aluminium alloy Nanocrystalline Microstructure

作者: WANG Xiaoming ZHU Sheng CHANG qing FENG Xueqiang

作者单位: Science and Technology on Remanufacturing Laboratory, Academy of Armored Force Engineering,Beijing 1 Department of Training, Academy of Armored Force Engineering, Beijing 100072, China

会议类型: 国际会议

会议名称: 中国微米纳米技术学会第14届学术年会、第3届国际年会暨第6届微米纳米技术“创新与产业化国际研讨与展览会(CSMNT2012 & ICMAN2012)

会议地点: 杭州

会议语种:英文

页码: 1-4

在线出版日期: 2012-11-04（万方平台首次上网日期，不代表论文的发表时间）