Hardened Materials Material Deformation Study Using Digital Image Correlation Technique for Nuclear Power Plant Applications

摘要

This paper investigates the results of tensile tests to estimate the mechanical properties of the hardened work material. The proposed Digital Image Correlation (DIC) technique has been applied to estimate the mechanical properties of hardened bearing steels (AISI 52100, AISI 4140) that is used in the slewing ring for special applications in nuclear reactors, cranes, excavators, wind turbines, etc. Through this non-contact technique estimation of the mechanical properties in both elastic and plastic regions with significant strains becomes comparatively easy with tensile testing. Tensile tests have been conducted for each specimen of hardness (HRC) 50 and 60. Based on the results, Engineering sample Stress-Strain curves are plotted for hardened steel specimens. Then these results are used for the design and the development of large diameter slewing bearing in the fuel handling unit for fast breeder reactor because through DIC technique accuracy of strain rate value gets increased in comparison to UTM results. The scope of the research is to study the contact stress, load versus deformation curves, temperature distribution, and any FEM analysis for higher accuracy.