Residual Stress Distribution in Water Jet Peened Type 304 Stainless Steel

Abstract

In materials with a surface treatment such as shot peening, the residual stress gradient in the surface layer is severe. When measuring the residual stress distribution near the surface with a severe stress gradient by the neutron diffraction method, the gauge volume must be removed from the measurement sample. However, when the gauge volume deviates from the sample, a pseudo peak shift occurs and accurate stress distribution cannot be evaluated. Therefore, it is necessary to evaluate the pseudo peak shift in advance under the same conditions, as in the case of actual residual stress measurement, using a sample in an unstressed state. In this study, the stress distributions in the surface layer of a type 304 stainless steel plate and bar with simulated stress-corrosion cracks which were subjected to water jet peening—giving a surface layer residual stress equivalent better than that of normal shot peening—were evaluated considering the pseudo peak shift. As a result, the residual stress distributions in the surface layer were measured in good agreement with the measurement result obtained by the sequential polishing X-ray diffraction method. It was clarified that the residual stress distribution in the near surface with steep stress gradient can be evaluated by the neutron diffraction method.

Laser Peening Analysis of Aluminum 5083: A Finite Element Study

“…This versatile technique is also used to form complex shapes and structures [6]. Compared to other similar surface engineering methods such as shot peening [7], water jet peening [8], and ultrasonic peening [9], LP is advantageous as it generates deeper residual stresses with increased thermal stability that is attributed to the lower amount of cold work [10]. However, to achieve the full potential of this technique, a precise understanding of the peening process along with the effects of different process parameters are required [11].…”

Effects of water jet peening on residual stresses, roughness, and fatigue

“…Balamurugan et al [20] also studied the compressive residual stresses induced by water jet peening. Due to its numerous merits in comparison with other peening processes, water jet peening has recently attracted even more attention and experimental or numerical studies have been still conducting on optimizing its variables and better understanding its nature [21-23].…”

Effect of garnet abrasive in water jet peening on AL 6063-T6 alloy

“…Before treatment the residual stress varies from 400 to 520 Mpa and after water jet peening the residual stress increased up to −500 MPa at the surface of the work piece. [1] N. Kamkar et al [2013] investigated the effect of water impingement erosion on Ti-6Al-4V alloy. Titanium based alloys are used in various situations like in exposed in rain, Steam and fogging effect.…”