Residual Stress Analysis of Austenitic Steel Designed for Nuclear Energetics in Surface Layers

Abstract

Monitoring of residual stresses in components can be useful in predicting damage incidences caused by workload over lifetime of components. Non-destructive measuring and evaluation of residual stresses and chemical properties of stainless steel sample and its possibility to affect functional properties of the material by using the X-ray diffraction has some advantages. Measured sample or part does not require special preparation or destruction and so it is capable to operate after measuring. This method also determines orientation of residual stress, so it is possible to identify absolute values of shear and normal stress with high accuracy.

Influence of Machining and Heat Treatment on Deformations of Thin-Walled Bearings

“…The content of the retained austenite was calculated by means of the non-standard method according to the relation: (1) In which I A and I M are integral intensities of diffractional maximums corresponding with diffraction plane (200) of austenite and martensite, B A and B M correspond with the intensity factor of individual phases. [13,14,15,16] Integral intensity of analyzed diffraction peak was defined according to the position of difractional maximums after profile fitting of a diffraction pattern and it is recorded by relevant processes in Figure 13. Besides austenite and martensite (ferite) also carbides of chrome Cr 7 C 3 and carbides of iron Fe 3 C were identified in the samples.…”