A study of the micro structural evolution during selective laser melting of Ti-6Al-4V
A study of the micro structural evolution during selective laser melting of Ti-6Al-4V
复制标题
DOI：
10.1016/j.actamat.2010.02.004
复制
发表时间：
2010-05-01
期刊：
影响因子：
9.4
通讯作者：
Kruth, Jean-Pierre
中科院分区：
文献类型：
--
作者：
Thijs, Lore;Verhaeghe, Frederik;Kruth, Jean-Pierre
选择性激光熔化（SLM）是一种增材制造技术，可以通过选择性熔化粉末层直接制造功能复杂的零件。该过程的特征在于在非常短的相互作用时间内高度局部化的高热量输入，因此将显著影响微观结构。本研究利用光学显微镜研究了SLM加工Ti-6Al-4V合金后显微组织的演变过程以及扫描参数和扫描策略对显微组织的影响。存在马氏体相，并且由于外延生长的发生，出现细长的晶粒。这些晶粒的方向与工艺参数直接相关。在高的热输入，它也被发现，在该过程中析出的金属间相Ti 3Al。(C)2010 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
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. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.