Topic
Peening
About: Peening is a research topic. Over the lifetime, 5538 publications have been published within this topic receiving 73073 citations.
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29 citations
01 Nov 2004
TL;DR: In this paper, the performance of Ti-6Al-4V after isothermal exposure was explored in test coupons in low plasticity burnished (LPB), shot peened (SP), and electropolished (ELP) baseline conditions.
Abstract: : The fretting fatigue performance of Ti-6Al-4V after isothermal exposure was explored in test coupons in low plasticity burnished (LPB), shot peened (SP), and electropolished (ELP) baseline conditions. In the current study, fretting fatigue data and fractography are presented along with in-depth residual stress profiles, both before and after the isothermal exposure. Surface roughness data for each of the three surface conditions are reported. For the studied fretting configuration, it was found that both the shot peening and LPB process improved the fretting fatigue performance over the baseline electropolished condition. In the LPD'd case the fretting damage was largely ameliorated by the burnishing process.
29 citations
TL;DR: In this article, shot peening process produced an ultra-fine surface microstructure and plenty of slip bands which resulted in an enhanced Cr diffusivity to form Cr-rich oxides.
Abstract: Oxidation behaviors of TP304H and HR3C steels with and without shot peening were investigated at 650 °C in water vapor. The oxide scales were studied with XRD, SEM and EDX. The results showed that the oxidation resistance of the steels was effectively improved by shot peening, especially for TP304H. The oxidation resistance of shot peened TP304H was even better than shot peened HR3C. The shot peening process produced an ultra-fine surface microstructure and plenty of slip bands which resulted in an enhanced Cr diffusivity to form Cr-rich oxides. The shot-peening process also induced martensite at the surface, which enhanced Cr diffusion and significantly affected the oxidation behavior of the TP304H steel.
29 citations
TL;DR: In this paper, a gradient-structured layer with initially nanoscale grain size increased gradually to original coarse microscale (∼50μm) was fabricated on the surface of austenitic (γ) stainless steel SS304 via ultrasonic nanocrystallization surface modification (UNSM) peening.
28 citations
TL;DR: In this paper, the microstructural evolution due to severe surface plastic deformation by oil jet peening in aluminium alloy, AA6063-T6, was described, which revealed the formation of submicron size grains at and near the surface.
28 citations