短時間高周波熱処理によるTi-6Al-4V合金の高強度化

概要

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This study was conducted to clarify the effect that quenching after induction heating for a short time (60 s) has on the mechanical properties and fatigue strength of Ti-6Al-4V alloy which is one of the most typical α+β titanium alloys. When heating temperature was higher than 1 173 K, the above heat treatment induced the transformation from β-phase to α martensite possessing a high hardness. Such creation of α'-phase greatly improved both the tensile strength and fatigue strength of the alloy although it decreased the ductility. However, in case that heating temperature was higher than β-transus temperature (1 268 K), the improvement of the tensile strength and fatigue strength was limited by growth of previous β grains. The above results showed that the appropriate temperature of the induction heat treatment for strengthening of Ti-6Al 4V alloy is between 1 173 K and β-transus temperature when heating time is 60 s.
一般社団法人日本機械学会の論文
1998-08-25