Surface Integrity-an Inherent Load Sensor

摘要

The presented approach evaluates the application of the surface integrity of machined components as load sensors.Residual stress relaxation due to mechanical load is utilized to retrieve information on the load history of a component.The critical load stress,the sensitivity and the relaxation gradient are quantified and analyzed for AISI 1060 steel.More specifically,the influence of heat treatment and therefore of the material's ultimate strength has been evaluated.The results show that the knowledge on the error determining the residual stress is crucial for the accuracy of the approach.Furthermore,a sufficient relaxation gradient has to be provided by low residual stress sensitivity and high initial residual stress magnitude.Both properties can be influenced by heat treatment and machining.