Micro scale laser shock forming of pure copper and titanium sheet with forming/blanking compound die
Micro scale laser shock forming of pure copper and titanium sheet with forming/blanking compound die
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DOI：
10.1016/j.optlaseng.2014.09.019
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发表时间：
2015-04-01
影响因子：
4.6
通讯作者：
Liu, Huixia
中科院分区：
文献类型：
--
作者：
Wang, Xiao;Zhang, Di;Liu, Huixia
本文报道了一种采用成形/冲裁复合模具通过激光冲击波制造薄金属箔微型零件的新工艺，其中柔性橡胶材料作为软冲头作用于薄金属板。对不同激光能量和材料的加工过程进行了系统的实验研究。通过纳米压痕测试对成型件的形貌、表面粗糙度、成型深度和力学性能（包括纳米硬度、塑性和弹性模量）进行了检查。结果表明，约束介质的烧蚀状态和不同区域的表面粗糙度随能量的变化而变化。此外，成形复杂零件需要适当的能量，并且成形工艺可用于制造具有良好表面质量的零件。此外，纳米压痕测试结果表明，冲击后材料的纳米硬度、塑性和弹性模量均有所增加。纳米硬度和塑性的增加可以导致零件的刚度更高。弹性模量的提高表明零件的刚度增加，为激光冲击过程中铜的回弹减少提供了证据。 (C) 2014 Elsevier Ltd. 保留所有权利。
A new process fabricating micro parts of thin metal foils by laser shock waves with forming/blanking compound die is reported in this article, in which flexible rubber material was used as the soft punch to act on the thin metal sheet. Systematic studies were carried out experimentally on the process with different laser energies and materials. The formed parts were examined in terms of their morphology, surface roughness, forming depth and mechanical properties (including nanohardness, plasticity and elastic modulus) characterized by nanoindentation test. According to the results, the ablation states of confinement medium and the surface roughness of the different regions change with energies. Additionally, the proper energies are necessary to form complex parts and the forming process can be applied to manufacture parts with good surface quality. What's more, the nanoindentation test results showed that the nanohardness, plasticity and elastic modulus of material were increased after impact. The increase in nanohardness and plasticity can attribute to higher stiffness of the parts. The enhanced elastic modulus indicates an increased stiffness of the parts, providing an evidence for the reduced spring back of copper during laser shocking. (C) 2014 Elsevier Ltd. All rights reserved.