Investigation of the formation mechanisms of the bonding zone in impact welding

冲击焊接结合区形成机制的研究

• 批准号: 227733627
• 负责人: Professor Dr.-Ing. Peter Groche
• 金额: --
• 依托单位: Institut für Produktionstechnik und Umformmaschinen
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/227733627?language=en
• 关键词: Investigation; formation; mechanisms; bonding; zone

Explosion welding and electromagnetic pulse welding are particularly suitable to generate metallurgical joints between dissimilar metals, because high joint strengths can be achieved. As a disadvantage, the relevant mechanisms within the joining area during the process are still not sufficiently investigated and well understood due to the limited accessibility and the high process velocities. However, knowing particularly these mechanisms is of great interest in order to be able to design joints purposefully. Currently, the actual bonding process is still a black box, where only input variables (such as the material properties) and resultant properties (such as the strength of the bond) are known, but not the linking mechanisms. The direct effect is that joints in the industrial application have to be designed empirically with more or less effort. A consequence may be that potentials remain untapped.Consequently, the aim of this project is to fill this gap by a careful variation of process and input parameters in combination with high spatial and temporal investigations, also in situ. This is done by examining specific hypotheses. The main subject of investigation is a special test stand at PtU, which is capable of combining well-defined, constant process parameters and good observability. New insights can be gained in additionally combining high speed imaging. During the research project, material, coating and surrounding medium are to be purposefully adjusted to study the effects. The experimental works are supported by numerical simulations which allow even deeper insights into the process.The project will be run in close cooperation with other research groups within the priority program to utilize the available experimental and analytical resources.

爆炸焊和电磁脉冲焊特别适合在异种金属之间产生冶金接头，因为可以获得高接头强度。缺点是，由于可及性有限和加工速度较高，加工过程中连接区域内的相关机制仍未得到充分研究和充分理解。然而，为了能够有目的地设计关节，特别了解这些机制非常有意义。目前，实际的粘合过程仍然是一个黑匣子，只知道输入变量（例如材料属性）和结果属性（例如粘合强度），但不知道链接机制。直接影响是工业应用中的接头必须或多或少地根据经验进行设计。结果可能是潜力尚未开发。因此，该项目的目的是通过仔细改变过程和输入参数，并结合高空间和时间研究（也在现场）来填补这一空白。这是通过检查具体假设来完成的。研究的主要对象是 PtU 的一个特殊测试台，它能够将明确的、恒定的工艺参数和良好的可观测性结合起来。另外结合高速成像可以获得新的见解。研究项目期间，需有目的地调整材料、涂层和周围介质，以研究其效果。实验工作得到数值模拟的支持，可以更深入地了解该过程。该项目将与优先计​​划内的其他研究小组密切合作，以利用现有的实验和分析资源。