Microstructure of gamma-titanium aluminide processed by selective laser melting at elevated temperatures

摘要

The present study deals with a 13-solidifying titanium aluminide processed by Selective Laser Melting using prealloyed gamma-TiAl powder. In particular the effects of energy density and preheat temperature on chemical composition and microstructure were investigated to acquire suitable process parameters. Tensile tests carried out at room temperature and 850 degrees C demonstrate that strengths in the range of conventionally produced material can be achieved. (C) 2015 Elsevier Ltd. All rights reserved.