Feature Size Effect on Formability of Multilayer Metal Composite Sheets under Microscale Laser Flexible Forming
Feature Size Effect on Formability of Multilayer Metal Composite Sheets under Microscale Laser Flexible Forming
复制标题
微尺度激光柔性成形下特征尺寸对多层金属复合材料板材成形性能的影响
DOI：
10.3390/met7070275
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发表时间：
2017-07-01
期刊：
影响因子：
2.9
通讯作者：
Wang, Xiao
中科院分区：
文献类型：
--
作者：
Liu, Huixia;Zhang, Wenhao;Wang, Xiao
多层金属复合板具有比整体金属板优越的上级性能，并且成形性不同于整体金属板。通过实验研究了特征尺寸对多层金属复合板微尺度激光柔性成形性能的影响。选用两层铜/镍复合板作为实验材料。利用五种不同直径的微模具。通过成形深度、厚度减薄、表面质量和显微硬度分布等指标评价了材料的成形性能。研究结果表明，特征尺寸对两层铜/镍复合板的成形性能有很大影响。随着特征尺寸的增大，叠层顺序对成形深度、厚度减薄率和表面粗糙度的影响越来越大。然而，在相同的层堆叠顺序下，成形部件的归一化成形深度、厚度减薄率、表面粗糙度和显微硬度随着特征尺寸的增大而先增大后减小。铜/镍复合板的变形行为主要取决于其外层。当铜层作为外层时，变形程度较大。
Multilayer metal composite sheets possess superior properties to monolithic metal sheets, and formability is different from monolithic metal sheets. In this research, the feature size effect on formability of multilayer metal composite sheets under microscale laser flexible forming was studied by experiment. Two-layer copper/nickel composite sheets were selected as experimental materials. Five types of micro molds with different diameters were utilized. The formability of materials was evaluated by forming depth, thickness thinning, surface quality, and micro-hardness distribution. The research results showed that the formability of two-layer copper/nickel composite sheets was strongly influenced by feature size. With feature size increasing, the effect of layer stacking sequence on forming depth, thickness thinning ratio, and surface roughness became increasingly larger. However, the normalized forming depth, thickness thinning ratio, surface roughness, and micro-hardness of the formed components under the same layer stacking sequence first increased and then decreased with increasing feature size. The deformation behavior of copper/nickel composite sheets was determined by the external layer. The deformation extent was larger when the copper layer was set as the external layer.