High strength titanium-aluminum alloy having improved fatigue crack growth resistance
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United States of America Patent
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Mar 21, 1995
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N/A
app pub date -
Apr 23, 1992
filing date -
Apr 23, 1992
priority date (Note) -
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Abstract
An alpha/beta titanium alloy having improved fatigue crack growth resistance can be prepared through a thermomechanical process using a three-step thermal treatment. The first step includes a heat up and hold at a temperature above the beta transition temperature, while the second step is a stabilization treatment which includes a heat up and hold below the beta transition temperature, in the alpha/beta range. The third thermal treatment is an aging treatment. The invention is particularly useful in preparing forged parts for aircraft.
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