Electro-magnetic melt pool displacement for joining dissimilar materials
用于连接异种材料的电磁熔池位移
基本信息
- 批准号:390568262
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:2018
- 资助国家:德国
- 起止时间:2017-12-31 至 2021-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Joining of dissimilar materials is a key challenge in the production of functionally and weight optimized structures for a variety of industrial applications. Especially for lightweight constructions in the automotive sector, the connection of aluminum with steel is of high importance, since these materials cannot be joined reliably with established welding processes. Currently used joining techniques like mechanical joining or adhesive joining are associated with certain disadvantages, so that novel joining technologies are still needed to be developed.The applied project aims at obtaining basic knowledge for the development of a new joining technology, which will produce joints of dissimilar materials basing on material bonding and interlocking. The approach is based on the generation of a localized melt pool by pulsed laser radiation on a first joint partner and the displacement of this melt pool by electromagnetically induced forces into a hollow shape of a second joining partner. Up to now, such electromagnetically induced forces are only used for continuous welding processes. Objective of the project is therefore to gain a basic understanding about the controllability of a short-term existing melt pool (existence time <0.5 s) by electromagnetically induced Lorentz forces.By using a transient pulse shape of the laser beam, a temperature level in the melt must be achieved, which avoids overheating of the melt pool and a melting of the second joining partner in order to limit well-known problems such as intermetallic phases or cracking. For the adjustment of the time transient energy input, the heat balance within the melt pool must be calculated. For this reason, an existing FEM model combining the electromagnetic forces with the melt pool convection must be further developed and adapted for pulsed laser treatment. At the end of the project, metallographic and electron microscopy as well as mechanical testing of joints shall be used to gain an understanding of the interdependencies between the temperature-cycle, the resulting material properties and the strength of the joints.
异种材料的连接是为各种工业应用生产功能和重量优化结构的关键挑战。特别是对于汽车行业中的轻质结构,铝与钢的连接非常重要,因为这些材料无法通过现有的焊接工艺可靠地连接。目前常用的连接技术如机械连接或粘接连接等存在一定的缺点,因此仍需要开发新的连接技术,本应用项目旨在为开发基于材料粘接和互锁的异种材料连接新技术提供基础知识。该方法基于通过脉冲激光辐射在第一接合伙伴上产生局部熔池以及通过电磁感应力将该熔池移位到第二接合伙伴的中空形状中。到目前为止,这种电磁感应力仅用于连续焊接过程。因此,该项目的目的是获得对短期现有熔池可控性的基本了解(存在时间<0.5s)。通过使用激光束的瞬态脉冲形状,必须实现熔体中的温度水平,这避免了熔池的过热和第二连接部件的熔化,以限制诸如金属间相或破裂的公知问题。为了调整时间瞬态能量输入,必须计算熔池内的热平衡。为此,现有的有限元模型相结合的电磁力与熔池对流,必须进一步发展和适应脉冲激光处理。在项目结束时,应使用金相和电子显微镜以及接头的机械测试来了解温度循环、所得材料性能和接头强度之间的相互依赖性。
项目成果
期刊论文数量(1)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Numerical and Experimental Investigation of Controlled Weld Pool Displacement by Electromagnetic Forces for Joining Dissimilar Materials
- DOI:10.3390/met10111447
- 发表时间:2020-10
- 期刊:
- 影响因子:2.9
- 作者:J. Heßmann;M. Bachmann;K. Hilgenberg
- 通讯作者:J. Heßmann;M. Bachmann;K. Hilgenberg
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Dr.-Ing. Kai Hilgenberg其他文献
Dr.-Ing. Kai Hilgenberg的其他文献
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{{ truncateString('Dr.-Ing. Kai Hilgenberg', 18)}}的其他基金
Laser beam joint welding of complex powder bed based additive manufactured components
基于复杂粉末床的增材制造部件的激光束接头焊接
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429808811 - 财政年份:2020
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392669488 - 财政年份:2018
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