电致塑性辅助微细模压成形介观尺度效应机理与工艺研究

项目名称： 电致塑性辅助微细模压成形介观尺度效应机理与工艺研究

项目编号： No.51275294

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 机械、仪表工业

项目作者： 彭林法

作者单位： 上海交通大学

项目金额： 84万元

中文摘要： 介观尺度微通道是高性能微通道反应器的核心结构。目前采用铣削、刻蚀等加工方法效率低、成本高。微细模压虽可提高效率，但常温条件下材料充模困难；热成形条件下零件表面质量差。制约着微通道反应器大规模运用。 本项目将不锈钢材料电致塑性效应引入介观尺度模压工艺，提出一种电致塑性辅助介观尺度模压成形新方法，降低成形力，改善表面质量。围绕模压过程中材料流变行为的控制，研究电流场引发的材料电致塑性激发机理及热效应抑制机制，定量描述电流对电致塑性效应的影响规律；研究材料电致塑性和介观尺度效应的相互激励行为，建立电流场作用下的介观尺度材料本构模型；研究电致塑性辅助介观尺度模压成形的多场耦合仿真建模方法，揭示成形过程中电流场分布对金属流变行为的影响规律；研究工艺参数波动对成形质量的影响规律，建立微通道模压成形工艺稳健性设计方法。最后，构建电致塑性介观尺度模压成形实验系统，为微通道高效高质量制造提供理论与方法。

中文关键词： 电致塑性；尺度效应；模压成形；材料模型；

英文摘要： The high aspect ratio micro channel is the key to the high efficiency of the micro channel reactor. Recently, Processing methods such as cutting and milling are of low efficiency and high cost. In the efficient forming process at room temperature, it is difficult to achieve precise forming of high aspect ratio micro channel features because the material is less formable. While hot forming process could result in surface oxidation and low quality product. So that It can not be widely used right now. In this project, a novel forming process is proposed to combine the application of the electroplastic effect with the meso-scale forming process, namely the meso-scale electroplastic forming process. Electric pulse is introduced into the forming process to induce the electroplastic effect and reduce the Joule heating, so as to improve the quality of the micro channel features. Centred on the material deformation behavior and the process control in the meso-scale electroplastic forming process, the influences of the electric pulse parameters on the electroplastic effect and the Joule heating are firstly studied, based on which the precise description scheme for the electroplastic effect is presented, and the meso-scale electroplastic constitutive model is established by taking into account the mutual influence between

英文关键词： electroplastic；size effect；micro-embossing；material model；