Study and comparison of microstructures in Ti-alloy before and after the heat treatment

Ti-6Al-4V alloy, also known as a +13 alloy, is commercially available titanium alloy. It has an ideal combination of strength, toughness, and hardness. Hence, it is highly suitable for various industries. Different heat treatment processes are usually applied to improve the mechanical properties of the Ti-alloys. Heat treatment alters the microstructure of the metal to a great extent. The present work deals with a discussion and comparison of as-received Ti-alloy and heat-treated Ti-alloys based on their microstructures. Optical microscope was used to observe the micrographs. All the images were captured at same magnification and scale. In case of as-received sample, we have mainly observed equiaxed type (a +13) structure whereas the heat-treated samples have shown other patterns too. The air-cooled (AC) sample contains mainly widmanstatten structure. The sand cooled (SC) sample contains mostly a-phase surrounded by dotted-type 13-phase. Oil cooled (OC) sample has more a-regions than SC sample with very less 13boundaries. Copyright (c) 2022 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the International Conference on Recent Advances in Modeling and Simulations Techniques in Engineering and Science.

Automated summary

Ti-6Al-4V alloy, commercially available titanium alloy, has an ideal combination of strength, toughness, and hardness. This study compares the microstructures of the as-received alloy and heat-treated alloys.