Mechanical Properties of Hot Isostatic Pressed p/M-Titanium for Helicopter Components

摘要

The production of titanium alloy (Ti6A14V) aircraft components was investigated. Powder metallurgy (P/M) manufacturing processes that involve hot isostatic pressing (HIP) and investment casting were characterized. The microstructure of P/M HIP Ti6A14V bar and plate specimens is depicted. Mechanical properties were determined by static tensile and fatigue testing and a modified Goodman diagram was derived. Mechanical properties are the same as those of the corresponding wrought alloy. Static and dynamic values for a P/M HIP Ti6A14V blade fitting were also found from results of helicopter rotor hub component tests. Analysis shows that the blade fitting fulfills strength requirements. Reduction in machining as well as raw material weight savings when manufacturing P/M HIP components are pointed out.