Ti-3Al-2.5V合金の四点曲げ疲労特性に及ぼすTiB配向の影響

抄録

Titanium alloys have been put into practical use in aircraft on the ground that these are light metals, and TiB reinforced titanium alloys are attracting attention in order to increase the strength of titanium alloys for aircraft. In this study, to investigate the effect of TiB orientation on fatigue properties of Ti-3Al-2.5V alloy with heat extrusion, four-point bending fatigue tests were conducted for plate-type specimens under stress ratio of 0.1 in an ambient laboratory atmosphere. The fatigue life of specimen with TiB which is oriented at longitudinal direction were lower than specimen with TiB which is oriented at short transverse or long transverse direction.