Investigation into the Behavior of Titanium and Titanium Alloys under Cavitational Stress

摘要

The cavitation resistance of titanium alloys was investigated using a droplet impinger and by comparison with other materials. An 8 mm diameter water jet was broken up by a rotating double-armed vane to the ends of which were attached the plate-shaped test pieces. The impact speed was 72 m/sec. Weight of the polished samples was determined each 20 min on a chemical balance. The cavitation resistance of TiAl6V4 alloy can be significantly increased by appropriate heat treatment. The cavitation resistance of the Ti-alloys varies over a very wide range, but they still fall even in the most unfavorable case within the group of Cu and Fe considered as being cavitation resistant.