Surface hardened threaded pipe parts made of high-strength aluminum alloy 1953T1 fatigue resistance
Outstripping superficial plastic deforming various regimes influence on polycyclic fatigue of threaded pipe specimens made of high-strength aluminum alloy 1953T1 has been examined. It's been shown that the most optimal type of hardening is rolling regime when pipe piece wall depth decrease by 1,5 mm. It's established that there's a direct correlation between hardened threaded specimens endurance limit increase and compressive residual stresses distribution character. This fact is well characterized using the average integral residual stresses criterion. Endurance limit increase prediction method for surface hardened threaded parts made of aluminum alloy 1953T1 using residual stresses distribution has been proposed.