Spark plasma sintering behavior of Ti-3Al-1Mo alloy

Titanium alloys with 3 wt% Al and 1 wt% Mo were prepared at different sintering temperatures (800 degrees C, 1000 degrees C, and 1100 degrees C) via spark plasma sintering technique. Sintering temperature effect on the compact's properties was investigated. The punch displacement curves show three distinct regions: particle rearrangement, solution precipitation, and thermal contraction. The microstructure shows the emergence of beta Ti phase into the a Ti phase matrix as the sintering temperature increase. The relative density and microhardness values were found to increase with a decrease in porosity with the compact sintered at 1000 degrees C having the maximum values of 99.9% and 290 +/- 21 HV respectively. An increment of 83.31% was obtained in the hardness value as the sintering temperature increased from 800 degrees C to 1000 degrees C. (C) 2019 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee