β型チタン合金の引張性質に及ぼす時効処理の影響

隠岐貴史　倉本英哲　柳沢　平^*
　　　　　　　　　　

　素粉末混合法により作製したTi-13mass%V-11mass%Cr-3mass%A1合金の引張性質に及ぼす溶体化時効処理の影響を検討したところ、本材料の溶製材と同じ条件の溶体化時効処理を施した場合、著しい脆化を示すが、短時間の時効処理により熱処理溶製材と同程度の高強度が得られた。また、素粉末から作製した本材料はHIP処理とSTA処理を組み合わせた処理あ可能であることを明らかにした。

　Effect of the solution treatment and the aging treatment(STA) on the tensile properties for the vacuum sintered plus HIP'ed Ti-13mass%V-11mass%Cr-3mass%Al alloy which are produced by blending elemental powder method has been investigated. The HIP'ed material showed the remarkable embrittlement, and the equivalent high strength by the aging in short time with the heat treatment ingot material, when STA condition equal to the ingot material alloy was carried out. It was proven that the processing which combined the HIP treatment with the STA processing was possible for this material produced from the element powder.