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OFHC铜高应变率激光冲击微坑的尺寸效应(英文) 被引量:3

Size effect on indentation depth of oxygen-free high purity copper induced by laser shock processing
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摘要 采用高温无氧铜材料,实验研究激光冲击压力作用下铜材料表面微坑的几何特征以及尺寸效应作用规律。通过控制热处理温度与保温时间,在厚度截面方向获得多种不同晶粒粒径的试样,结合2种不同光斑大小的实验,研究激光冲击表面高应变率塑性变形的大小效应作用特征。实验结果表明:在相同激光能量条件下,大光斑冲击产生的微坑深度较大。晶粒粒径对微坑深度有较大的影响,小晶粒条件下,产生的坑深较小;大晶粒条件下,光斑大小与晶粒粒径对于坑深的影响较为显著。 采用高温无氧铜材料,实验研究激光冲击压力作用下铜材料表面微坑的几何特征以及尺寸效应作用规律。通过控制热处理温度与保温时间,在厚度截面方向获得多种不同晶粒粒径的试样,结合2种不同光斑大小的实验,研究激光冲击表面高应变率塑性变形的大小效应作用特征。实验结果表明:在相同激光能量条件下,大光斑冲击产生的微坑深度较大。晶粒粒径对微坑深度有较大的影响,小晶粒条件下,产生的坑深较小;大晶粒条件下,光斑大小与晶粒粒径对于坑深的影响较为显著。
出处 《中国有色金属学会会刊:英文版》 CSCD 2012年第S2期573-578,共6页 Transactions of Nonferrous Metals Society of China
基金 Projects (50905109, 51075271) supported by the National Natural Science Foundation of China Project (20090073110039) supported by the Doctoral Fundation of Ministry of Education, China Project supported by the Young Faulty Research Foundation of Shanghai JiaoTong University, China
关键词 激光冲击强化 尺寸效应 微坑 厚度 光斑尺寸 laser shock processing size effect indentation thickness spot size
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参考文献16

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同被引文献51

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