材料科学
微观结构
选择性激光熔化
金属间化合物
光学显微镜
相(物质)
合金
钛合金
铝化钛
冶金
扫描电子显微镜
激光器
复合材料
光学
化学
物理
有机化学
作者
Lore Thijs,Frederik Verhaeghe,Tom Craeghs,Jan Van Humbeeck,Jean‐Pierre Kruth
出处
期刊:Acta Materialia
[Elsevier]
日期:2010-03-17
卷期号:58 (9): 3303-3312
被引量:2472
标识
DOI:10.1016/j.actamat.2010.02.004
摘要
Selective laser melting (SLM) is an additive manufacturing technique in which functional, complex parts can be created directly by selectively melting layers of powder. This process is characterized by highly localized high heat inputs during very short interaction times and will therefore significantly affect the microstructure. In this research, the development of the microstructure of the Ti–6Al–4V alloy processed by SLM and the influence of the scanning parameters and scanning strategy on this microstructure are studied by light optical microscopy. The martensitic phase is present, and due to the occurrence of epitaxial growth, elongated grains emerge. The direction of these grains is directly related to the process parameters. At high heat inputs it was also found that the intermetallic phase Ti3Al is precipitated during the process.
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