M. Aronov, N. I. Kobasko, J. A. Powell, IQ Technologies, Inc., Akron, OH; C. R. Hubbard, F. Tang, T. R. Watkins, Oak Ridge National Laboratory, Oak Ridge, TN; D. B. L. Ferguson, Z. Li, Deformation Control Technology, Inc., Cleveland, OH

Summary: The paper reports the results of a study conducted for evaluating the effect of the intensive quenching process on residual stress in a cylindrical part. The test specimens were 5160 steel rods of 25 mm in diameter and 127 mm in length. Five sets of test samples were evaluated. The samples of three sets were intensively quenched in highly agitated water by the intensive quenching process and were tempered at two different temperatures. One set of the intensively quenched samples was shot peened after tempering. Two sets of specimens were conventionally quenched in oil and then tempered. One oil-quenched and tempered set of samples was then shot peened. The residual stresses in test specimens at the surface and through thickness were measured by an X-ray diffraction method and by a neutron diffraction method, respectively. The residual stress distribution was also calculated using the DANTE computer program. The results of the study demonstrate that the intensive water quenching process significantly improves the part stress conditions compared to oil quench.