Prediction of Mechanical Properties for Pseudo-α-Titanium Alloy Forgings at Room and Elevated Temperatures

Abstract—The influence of compositional variations of the pseudo-α VT18U alloy on the mechanical properties of forgings after standard annealing is investigated. An increase in the degree of alloying (expressed in terms of aluminum and molybdenum equivalents) is shown to enhance the strength properties while decreasing the ductility and impact toughness of the alloy. A regression model is developed to predict the ultimate tensile strength using the chemical composition of the VT18U alloy forgings after conventional annealing. A predictive model is developed to estimate the ultimate tensile strength of VT18U semifinished products at operating temperatures up to 600°C using room-temperature data.