Abstract
In order to study the residual stress induced by foreign object damage (FOD), the distribution of residual stress caused by the impact of a hard spherical body was measured via the sin2ψ technique, using synchrotron X-ray. A steel sphere was impacted onto a flat surface of a Ti-6Al-4V alloy from an angle of either 90° or 45°, at a velocity of 180 m/s. The same sphere was also quasi-statically pressed into the surface. In the cases of right-angled impact and quasi-static indentation, a compressive residual stress was extensively distributed inside the generated crater. No remarkable difference in residual stress distribution was noted between the dynamic case and the quasi-static case. However, at an impact angle of 45°, a tensile residual stress that is more detrimental to fatigue strength was widely distributed inside the crater. Outside of the craters, tensile stress was generally observed in all cases.
Original language | English |
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Article number | e12367 |
Journal | Strain |
Volume | 56 |
Issue number | 5 |
DOIs | |
Publication status | Published - Oct 1 2020 |
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering