On the High Temperature Mechanical Properties of Ti-8%Al-4%Co Alloy

Tsujimoto Tokuzou, Sasano Hisaoki, Adachi Masao

doi:10.2320/jinstmet1952.31.3_223

Bibliographic Information

Other Title

Ti-8%Al-4%Co合金の高温機械的性質について
Ti-8パーセント Al-4パーセント Co ゴウキンノコウオンキカイテキセイシツニツイテ

Search this article

Abstract

Ti-8%Al-4%Co alloy can be expected to have good mechanical properties at high temperatures because of its high aluminium content. At first, the effect of heat treatment on the creep-rupture properties was investigated. From the results, the heat treatment, i.e., quenching from 700°C, was selected for high temperature use. Then tensile, creep-rupture and fatigue properties at high temperatures were investigated.<BR>The results are as follows:<BR>(1) Up to 500°C in testing temperature, the tensile strength at elevated temperature is slightly affected by testing temperature, and over 500°C it decreases markedly. The tensile strength at 500°C is 82.5 kg/mm².<BR>(2) Above 460°C the crrep-rupture strength is lower than the fatigue strength and below this temperature the latter is lower. The creep-rupture strength for 1000 hr is 32 kg/mm² at 500°C and decreases linearly between 400°C and 600°C. The fatigue strength for 10⁷ cycles is 47.4 kg/mm² at 400°C and hardly varies below 400°C.

Journal

Journal of the Japan Institute of Metals and Materials

Journal of the Japan Institute of Metals and Materials 31 (3), 223-227, 1967

The Japan Institute of Metals and Materials

Keywords

Details 詳細情報について

Export