首页> 外文会议>World Conference on Titanium v.1; 20030713-20030718; Hamburg; DE >A Study on the Microstructure of Direct Laser Fabricated Ti-6Al-4V and Ti-15V-3Cr-3Sn-3Al Alloys
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A Study on the Microstructure of Direct Laser Fabricated Ti-6Al-4V and Ti-15V-3Cr-3Sn-3Al Alloys

机译:直接激光制备Ti-6Al-4V和Ti-15V-3Cr-3Sn-3Al合金的显微组织研究

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摘要

Direct laser fabrication (DLF) technique can produce near full dense components using laser and powder using CAD files to define the shape of the sample. In this study DLF has been used to produce samples from Ti-6Al-4V and Ti-15V-3Cr-3Sn-3Al powders under a range of laser processing conditions. The effects of process conditions on microstructure and mechanical properties have been investigated. It has found that in the laser deposited samples of (α+β) alloy, Ti-6Al-4V, there is a pronounced tendency to form columnar grains. In contrast the β alloy, Ti-15V-3Cr-3Sn-3Al, tends to form equiaxed grain throughout the samples. The mechanisms for forming columnar or equiaxed microstructures in DLFed materials are discussed in terms of the phase diagram of the materials.
机译:直接激光制造(DLF)技术可以使用激光和粉末(通过CAD文件定义样品的形状)来生产几乎完全致密的组件。在这项研究中,DLF已用于在一系列激光加工条件下从Ti-6Al-4V和Ti-15V-3Cr-3Sn-3Al粉末生产样品。研究了工艺条件对组织和力学性能的影响。已经发现,在(α+β)合金Ti-6Al-4V的激光沉积样品中,存在形成柱状晶粒的明显趋势。相反,β合金Ti-15V-3Cr-3Sn-3Al倾向于在整个样品中形成等轴晶。根据材料的相图讨论了在DLFed材料中形成柱状或等轴微结构的机理。

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