Evaluation of Residual Stresses in Heat Treated AISI 5115 and AISI 52100 Steels via Analysis of Instrumented Sharp Indentation Load-Unload Cycle

Evaluation of Residual Stresses in Heat Treated AISI 5115 and AISI 52100 Steels via Analysis of Instrumented Sharp Indentation Load-Unload Cycle

Culha, Osman
Tas, Seher
Toparli, Mustafa

In this research, heat treated AISI 5115 (16MnCr5) cementation and AISI 52100 roller bearing steels were investigated. The specimens that were prepared before and after heat treatment application were sectioned via wire-erosion machine. Specimens were properly sanded and polished to get a smooth surface. Optical micrographs of each specimen were taken by a Nikon Eclipse ME 600 metallographic microscope. These specimens were then examined by using a Dynamic Ultra Micro Hardness (DUH) tester under a set of maximum loads of 200, 400, 600, 800, and 1000 mN. For each heat treated and non-heat treated specimen subjected to load-unload cycle under the same amount of maximum load, load vs. penetration depth curves were plotted. By comparing the resultant load-unload curves, types of the residual stresses were determined. Individual calculations were made for tensile and compressive residual stresses to obtain the residual stress values.

Conference or Workshop Item
PeerReviewed

2010-06

446