Method for improving fatigue properties of titanium alloy articl

Details Method for improving fatigue properties of titanium alloy articl Method for improving fatigue properties of titanium alloy articl

1976-04-19

1977-10-11

Stallard, W.

Metal treatment

Compositions

Heat treating

148 127B, C22F 118

Patent

active

040533301

ABSTRACT:
A thermomechanical treatment to improve the fatigue strength of articles made from one of a class of alpha beta titanium alloys. The treatment involves heating the alloy into the beta field, hot deforming the alloy at a temperature within the beta field, rapidly quenching the alloy to room temperature to produce a hexagonal martensite structure and then tempering at an intermediate temperature so as to produce a structure in which discrete equiaxed beta phase particles are presented in an acicular alpha matrix. This structure is particularly resistant to the initiation and propagation of fatigue cracks.

REFERENCES:
patent: 2974076 (1961-03-01), Vordahl
patent: 3436277 (1969-04-01), Bomberger, Jr. et al.
patent: 3649374 (1972-03-01), Chalk
patent: 3748194 (1973-07-01), Ruckle et al.
patent: 3867208 (1975-02-01), Grekov et al.
patent: 3901743 (1975-08-01), Sprague

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