Ti-20 V-4 Al-1 Sn合金の疲労特性に及ぼす水素吸蔵後の時効処理の影響(<小特集>水素エネルギーシステムに使用される材料の強度問題)

概要

論文の詳細を見る
The influence of aging after hydrogen absorption on the fatigue properties of a β-type titanium alloy, Ti-20 V-4 Al-1 Sn, was examined. Hydrogen was absorbed to the alloy through acid-cleaning in order to make three model materials possessing different hydrogen quantities. Since hydrogen is a strong β-phase stabilizer, the precipitation of a fine α phase during aging was strongly suppressed and age-hardening was delayed with increasing absorbed hydrogen quantity. In the materials aged after hydrogen absorption, even if their hardness and tensile strength were leveled out by adjusting the aging time, fatigue strength was slightly decreased with the increase in hydrogen quantity. It was thought that such reduction in the fatigue strength resulted from the existence of weak parts where the density of the α phase precipitated with aging was lower.
社団法人日本機械学会の論文
2007-12-25