Microscale laser peen forming of single crystal
Microscale laser peen forming of single crystal
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DOI：
10.1063/1.2891573
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发表时间：
2008-03
影响因子：
3.2
通讯作者：
Youneng Wang;Yajun Fan;J. Kysar;S. Vukelić;Y. Yao
中科院分区：
文献类型：
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作者：
Youneng Wang;Yajun Fan;J. Kysar;S. Vukelić;Y. Yao
由于微细加工技术对许多工业产品的需求迅速增加，激光微热成形和微细表面处理[微尺度激光冲击喷丸(μ)]得到了广泛的研究。微细激光喷丸成形(μLPF)结合了这两种工艺的优点和受控弯曲变形的优点，不仅可以提高材料的疲劳寿命，还可以成形微尺度的金属零件，因此近年来受到了越来越多的关注。本文采用单晶铝的μ液固相变来研究材料的各向异性响应。用电子背散射衍射法测量晶格旋转来表征局部塑性变形。用X射线微区衍射仪对喷丸后试件两侧的残余应力分布进行了分析，并与有限元模拟结果进行了比较。研究了三种有效滑移系统中μLPF的各向异性行为.
As the result of quickly increased requirement in many industrial products resulting from microtechnology, laser thermal microforming and microsurface treatment [microscale laser shock peening (μLSP)] have been well studied. By combining the beneficial effects of these two processes with a controlled bending deformation, microscale laser peen forming (μLPF) attracts more attention recently since it not only improves the fatigue life of the material but also shapes microscale metallic parts at the same time. In the present study, μLSP of single crystal aluminum was presented to study anisotropic material response. Local plastic deformation was characterized by lattice rotation measured through electron backscatter diffraction. Residual stress distributions of both sides of a peened sample, characterized by x-ray microdiffraction, were compared with the results obtained from finite element method simulation. μLPF anisotropic behavior was investigated in three effective slip systems via both the anisotropic ...