罗新民,苑春智,任旭东,陈康敏,张永康

• 1:江苏大学材料科学与工程学院
• 2:江苏大学机械工程学院
• 3:江苏大学分析测试中心

摘要(Abstract)：

用输出波长为1.054μm、脉冲宽度为20 ns、光斑直径为7 mm的调Q钕玻璃激光,对TA2工业纯钛板料进行了激光冲击,用热场发射扫描电镜观察分析了激光冲击后钛板的微结构及其形貌。结果表明:激光冲击作用于钛板表面的等离子爆轰波能有效地对TA2工业纯钛板料实施形变,激光冲击后板材内部的微观形貌与冲击产生的应变类型有关。在压缩变形部位,微观组织以应变诱发马氏体为主。在拉伸变形部位,以形变孪晶带为主;激光冲击的超高能量和超高应变率可使hcp多晶金属晶体爆发大量薄片孪晶,从而调整晶粒内部的晶体取向,诱发滑移系开动,使形变得以进行。

关键词(KeyWords)： 激光冲击形变;超高应变率;钛合金;塑性变形;微结构

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学重点基金(50735001)

作者(Author): 罗新民,苑春智,任旭东,陈康敏,张永康

DOI: 10.13289/j.issn.1009-6264.2010.06.031

参考文献(References)：

• [1]Charles S Montross,Tao Wei,Lin Ye.Laser shock processing and its effects on microstructure and properties of metal alloys:a review[J].International Journal of Fatigue,2002,24:1021-1027.
• [2]Curt A Lavender,Sung-Tae Hong,Mark T Smith,et al.The effect of laser shock peening on the life and failure mode of a cold pilger die[J].Journal of Materials Processing Technology,2008,204(1-3):486-491.
• [3]马壮,李应红,张永康,等.激光冲击处理304不锈钢力学性能的影响[J].材料热处理学报,2007,28(3):102-105.MA Zhuang,LI Ying-hong,ZHANG Yong-kang,et al.Influence of laser shock processing on mechanical property of SUS304 steel[J].Transactions ofMaterials and Heat Treatment,2007,28(3):102-105.
• [4]郭乃国,罗新民,花银群.激光冲击处理对金属微结构及其性能的影响[J].材料导报,2006,20(6):10-13.GUO Nai-guo,LUO Xin-min,HUA Ying-qun.The effects of laser shock processing on microstructure and properties of metal[J].Materials Review,2006,20(6):10-13.
• [5]张凌峰,张永康,任旭东,等.激光冲击约束层和吸收层的研究[J].农业机械学报,2007,38(1):127-131.ZHANG Ling-feng,ZHANG Yong-kang,REN Xu-dong,et al.Study of confinement layer and absorbing layer in laser shock processing[J].Transactions of the Chinese Society for Agricultural Machinery,2007,38(1):127-131.
• [6]Berthe L,Sollier A,Peyre P.Generation of laser shock waves in a water confinement regime with 50 ns and 150 ns XeCl excimer laser pulses[J].Applied Physics,2000,33(17):546-562.
• [7]张永康,高立,杨超君.激光冲击TA2板料变形的理论分析和实验研究[J].中国激光,2006,33(9):1282-1287.ZHANG Yong-kang,GAO Li,YANG Chao-jun.Theoretical analysis and experiment on deformation of TA2 sheet under laser shock[J].ChineseJournal of Lasers,2006,33(9):1282-1287.
• [8]邓安华.钛合金的马氏体相变[J].上海有色金属,1999,20(4):193-199.DENG An-hua.Martensitic transformation of titanium alloys[J].Shanghai Nonferrous Metals,1999,20(4):193-199.
• [9]孙智,苏铁健,李淑华,等.高应变率下工业纯钛变形与失效研究[J].兵器材料科学与工程,2007,30(3):43-47.SUN Zhi,SU Tie-jian,LI Shu-hua,et al.Study on deformation and failure of TA2 under compressive load at high strain rate[J].Ordnance MaterialScience and Engineering,2007,30(3):43-47.
• [10]宋西平,顾海澄.工业纯钛低温拉伸和循环变形中的孪生行为[J].材料研究学报,2000,14(s1):194-199.SONG Xi-ping,GU Hai-cheng.The twinning behaviour during tension and fatigue at low temperature in commercial purity titanium[J].ChineseJournal of Material Research,2000,14(s1):194-199.
• [11]王静宜,高巍,徐彤,等.α-Ti马氏体变形层组织结构的电子显微分析[J].兵器材料科学与工程,1999,22(3):9-12.WANG Jing-yi,GAO Wei,XU Tong,et al.TEM structure study on the surface deformed layer of Ti martensite[J].Ordnance Material science andEngineering,1999,22(3):9-12.
• [12]徐祖耀.应力作用下的相变[J].热处理,2004,19(2):1-16.HSU T Y.Phase transformations under stress[J].Heat Treatment,2004,19(2):1-16.
• [13]胡赓祥,钱苗根.金属学[M].上海:上海科学技术出版社,1980:279.
• [14]Chichilli D R,Ramesh K T,Hemker K J.The high-strain-rate response of alpha-titanium:experiments,deformation mechanisms and modeling[J].Acta Mater,1998,46(3):1025-1043.
• [15]石德珂.材料科学基础[M].北京:机械工业出版社,2003.

文章评论(Comment)：