Mechanical Properties and Microstructural Features of Direct Laser-Deposited Ti-6Al-4V
Mechanical Properties and Microstructural Features of Direct Laser-Deposited Ti-6Al-4V
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DOI：
10.1007/s11837-015-1308-9
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发表时间：
2015-03-01
期刊：
影响因子：
2.6
通讯作者：
Shamsaei, Nima
中科院分区：
文献类型：
--
作者：
Bian, Linkan;Thompson, Scott M.;Shamsaei, Nima
直接激光沉积(DLD)是一种通过吹制粉末(或线材)和原位激光输送来添加制造金属功能部件的方法。尽管在制造后DLD零件的表征和优化DLD工艺方面进行了各种研究，但仍有许多领域需要进一步探索，以促进DLD零件在工程应用中的广泛适应和应用。本文综述了用DLD工艺制造的Ti-6Al-4V零件的力学性能，包括拉伸、疲劳特性和显微组织特征。这些机械性能将与DLD工艺参数(例如，激光功率、横移速度等)相关。以及由此产生的现象，如熔池动力学和部分热历史。由于疲劳是许多工程应用中零件的主要失效形式，本文重点研究和讨论了DLD法制备的Ti-6Al-4V零件的疲劳行为。
Direct laser deposition (DLD) is a means to additively manufacture metallic, functional parts via blown powder (or wire) and in situ laser delivery. Despite the various research efforts in characterization of post-manufactured DLD parts and in optimizing the DLD process, there are still areas that need to be further explored to promote the widespread adaption and utilization of DLD parts for engineering application. This article aims to review the mechanical properties of Ti-6Al-4V parts manufactured via DLD, including tensile and fatigue characteristics and microstructural features. These mechanical properties will be related with DLD process parameters (e.g., laser power, traverse speed, etc.) and resultant phenomena such as melt pool dynamics and part thermal history. Because fatigue is a main failure mode of parts in many engineering applications, the fatigue behavior of Ti-6Al-4V parts fabricated via DLD is highlighted and discussed in detail.