614 Ti-Fe-Cr-Al 系βチタン合金の引張特性と時効挙動

概要

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Titanium and its alloys, especially beta titanium, are very attractive material to use for the supporting equipments because of their high specific strength and good biocompatibility. However, beta titanium alloys are relatively costly. Low cost Ti-Fe-Cr alloys without costly elements have an attractive balance of tensile strength and ductility. In this alloy isothermal omega phase, which makes the alloy brittle, is precipitated by aging. Further aging of the alloy, by precipitating alpha, did not harden significantly as compared to some the commercial beta titanium alloys. By aluminum addition, a less costly material, to the Ti-Fe-Cr alloy, isothermal omega precipitation was suppressed and the age hardening, with alpha precipitation, was improved. The alloy, Ti-Fe-Cr-Al, is less costly and harder than that of Ti-Fe-Cr alloy when aged at the same temperature.
社団法人日本機械学会の論文
2002-08-24