High power laser beam melting of Ti6Al4V on formed sheet metal to achieve hybrid structures
High power laser beam melting of Ti6Al4V on formed sheet metal to achieve hybrid structures
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高功率激光束熔化成形金属板上的 Ti6Al4V 以实现混合结构
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Michael Schmidt
中科院分区：
文献类型：
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作者：
B. Ahuja;Adam Schaub;M. Karg;R. Schmidt;M. Merklein;Michael Schmidt
出于将两种制造概念（即增材制造和金属板材成形）的优点联合收割机结合起来的愿望，出现了混合工艺的概念。激光束熔化工艺以其特有的逐层制造方法已经被证明是成功的，可以用微米级的Ti6Al4V粉末制造完全致密的3D结构。本研究的重点是直接制造的Ti6 Al4V添加剂结构上的薄的预成型的Ti6 Al4V金属片基板。在现有技术的激光束熔化工艺中，固体结构的制造在附接到厚的常规制造的基板的支撑结构上完成。现有技术的工艺还使用制造平台的200 ° C预热，以便减少热诱导应力对制造结构的影响。在混合制造概念中，3D结构直接在薄金属片上制造，并且与传统工艺相比，热力学条件显著不同。本研究旨在了解成形板材与增材结构之间相互作用的基本方面，从而确定相应的力学特性。在制造过程中的相互作用过程中暴露的合金局部非最佳的热循环，因此，研究的目的是了解在制造过程中所涉及的各种影响因素。在本研究中还讨论了实现目标制造所需的系统技术修改。
Motivated by the desire to combine the advantages of two manufacturing concepts, namely Additive Manufacturing and sheet metal forming, the concept of hybrid processes emerged. Laser Beam Melting process with its characteristic layer by layer fabrication methodology has already been proved to be successful in fabricating fully dense 3D structures with micro sized Ti6Al4V powder. The presented research focuses on direct fabrication of Ti6 Al4V Additive Structures on a thin pre-formed Ti6 Al4V sheet metal substrate. In the state of the art Laser Beam Melting process, fabrication of solid structures is done on a support structure attached to a thick conventionally manufactured base plate. The state of the art process also uses a 200°C pre-heating of the fabrication platform in order to reduce the effect of heat induced stresses on the fabricated structures. Within the hybrid fabrication concept, 3D structures are directly fabricated on a thin sheet metal and the thermodynamic conditions are significantly different in comparison to the conventional process. The research aims at understanding the fundamental aspects of the interaction between the formed sheet metal and additive structure determines the corresponding mechanical characteristics. The interaction process during the fabrication exposes the alloy locally to non-optimum thermal cycles and the research therefore aims to understand the various influencing factors involved during the fabrication process. The system technology modifications required to achieve the aimed fabrication are also discussed in the presented research.