Study of low-temperature impact deformation behavior of Ti–6Al–4V alloy

Abstract

The impact behavior of the Ti–6Al–4V alloy has been investigated at varying temperatures (298 K, 223 K, 77 K) in this study. The results reveal a decrease in toughness with reduced temperature, with notable changes in energy distribution between crack initiation and propagation. The {101¯2}α twins formed in the studied sample under impact loading at 298 K and 223 K, and were absent at 77 K. The formation and propagation of twins contribute to the higher toughness of the 298 K and 223 K samples. These findings would provide valuable guidance to optimize the Ti–6Al–4V alloy toughness in low-temperature environments.