Comparative Analysis of the Surface Layer Effect on the Stress-Strain Characteristics of D16AT Alloy

Abstract

A method providing study of the effect of changes in the surface layer on the stress-strain characteristics and fatigue resistance of samples is considered and exemplified in the study of D16AT alloy. The strain diagrams obtained in the step-stress test provided estimation of strain resistance of structurally inhomogeneous samples in the extreme stress area. It has been experimentally proved that a cladding layer having the mechanical properties lower than the material of the substrate reduces the strain resistance, whereas the layer produced by vibration shock treatment increases the strain resistance of samples. Methodology of the study is presented.