Effect of rolling temperature on microstructure and mechanical properties of a TiZrAl alloy

To obtain excellent mechanical properties and globular microstructure in TiZr based alloys, the variation of microstructure during hot rolling at a temperature range from alpha region to beta region has been investigated in a TiZrAl alloy for further understanding and control of processing-structure-property relationships. Experimental results showed that when hot rolling at alpha region, increasing rolling temperature could enhance the progress of dynamic globularization and refine the grain structure. However, coarse grain with slender alpha lath appeared when rolling temperature was above the alpha ->beta transus temperature. The mechanical properties of studied alloy were also investigated with the change in rolling temperature. Outstanding mechanical properties (alpha(b) = 1564 MPa and epsilon = 10%) were obtained when rolling at 800 degrees C, which was found to be the optimal rolling temperature for this alloy. The high strength and good ductility of the studied alloy make it a good candidate for a wide range of applications. (C) 2015 Elsevier B.V. All rights reserved.