Effect of Annealing Temperature on the Ballistic Limit Velocity of Ti- 6A1-4V ELI

Although titanium alloys have been used successfully in aircraft for many years, the relatively high cost of titanium coupled with the limited information on its ballistic properties has prevented widespread use in ground vehicles. In order to provide this ballistic information to vehicle designers, the U.S. Army Research Laboratory (ARL) and the RMI Titanium Company (RMI) performed a joint research program to evaluate the effect of annealing temperature on Ti-6A1-4V alloy, extra-low interstitial (ELI) grade, currently specified by MIL-A-46077D for armor use for the U.S. Army. RMI provided the plates, performed the annealing, and collected mechanical and microstructural information. ARL then tested the plates with the 20-mm fragment-simulating projectile (FSP) in order to determine the response of limit velocity as annealing temperature was varied from 732-1,038 deg C. This report summarizes information presented at ASM International Aeromat '96 Conference in Dayton, OH, in June 1996 and at the 16th International Symposium on Ballistics in San Francisco, CA, in September 1996.Army Research Lab Aberdeen Proving Ground is the author of 'Effect of Annealing Temperature on the Ballistic Limit Velocity of Ti- 6A1-4V ELI' with ISBN 9781423582748 and ISBN 1423582748.