Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7882451 | Acta Materialia | 2014 | 9 Pages |
Abstract
Selective laser melting (SLM) is an additive manufacturing process in which functional, complex parts are produced by selectively melting consecutive layers of powder with a laser beam. This flexibility enables the exploration of a wide spectrum of possibilities in creating novel alloys or even metal-metal composites with unique microstructures. In this research, Ti6Al4V-ELI powder was mixed with 10 wt.% Mo powder. In contrast to the fully αⲠmicrostructure of Ti6Al4V after SLM, the novel microstructure consists of a β titanium matrix with randomly dispersed pure Mo particles, as observed by light optical microscopy, scanning electron microscopy and X-ray diffraction. Most importantly, the solidification mechanism changes from planar to cellular mode. Microstructures after heat treatment indicate that the β phase is metastable and locate the β transus at â¼900 °C, and tensile properties are equal to or better than conventional β titanium alloys.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
B. Vrancken, L. Thijs, J.-P. Kruth, J. Van Humbeeck,