Titanium alloy treatment process and resulting article
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United States of America Patent
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May 8, 1990
Grant Date -
N/A
app pub date -
Apr 21, 1989
filing date -
Apr 21, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A carefully controlled amount of hydrogen is diffused into titanium or its alloys at an elevated temperature above the transformation temperature. After the elevated temperature is maintained for an approprate duration of time, eutectoid transformation is performed in an inert atmosphere, again for an appropriate period of time, during which or alternatively after which the hydrogen is removed and the metal cooled to room temperature. A sintered titanium alloy component of the type intended for use as a joint replacement subjected to such a treatment displays a fatigue strength which is noticeably improved over a similar article with an equiaxed or lamellar microstructure.
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