Laser shock forming on coated metal sheets characterized by ultrahigh-strain-rate plastic deformation
Laser shock forming on coated metal sheets characterized by ultrahigh-strain-rate plastic deformation
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DOI：
10.1063/1.1459624
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发表时间：
2002-03
影响因子：
3.2
通讯作者：
M. Zhou;Yongkang Zhang;L. Cai
中科院分区：
文献类型：
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作者：
M. Zhou;Yongkang Zhang;L. Cai
报道了一种激光冲击驱动的动态超高应变率成形方法。这项研究表明，激光冲击成形是一个机械过程，而不是一个热过程，应变速率可高达107-109 s-1，比现有的所有成形方法高出两个或更多个数量级。通过对表面硬度和残余应力的研究，认为激光冲击成形是一种将激光冲击强化与金属成形相结合的技术，它引入了应变硬化和残余压应力。发现了激光冲击成形中的非线性塑性变形特征。
We report on a dynamic ultrahigh-strain-rate forming method driven by laser impact. This investigation reveals that laser shock forming is a mechanical, not a thermal process, and the strain rate can go up to 107–109 s−1, two or more orders higher than that of all the existing forming methods. By investigating the hardness and residual stress of the surfaces, we conclude that laser shock forming is a technique with combining laser shock strengthening and metal forming, which introduces strain hardening and compressive residual stresses. We also discover some nonlinear plastic deformation characters in laser shock forming.