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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TL;DR: In this paper, a finite element (FE) simulation model is presented in order to serve as a fast prediction tool for the surface layer characteristics after shot peening, including an elasto-viscoplastic combined isotropic kinematic material.
95 citations
TL;DR: In this article, the authors analyzed the induced compressive residual stress (CRS) relaxation and redistribution during bending fatigue at low-cycle fatigue (LCF) and high cycle fatigue (HCF) testing regimes of shot-peened 0.45% (annealed) carbon steel.
95 citations
TL;DR: In this paper, a nanocrystallized surface was fabricated on low-carbon steel by ultrasonic shot peening (USSP) technique, and the electrochemical corrosion behavior of the SNC low carbon steel with different grain sizes was studied by electrochemical methods.
Abstract: A nanocrystallized surface was fabricated on low-carbon steel by ultrasonic shot peening (USSP) technique. The grain size on the top latter of the surface narrocrystallized (SNC) low-carbon steel was about 20 nm. which increased with distance from the peening surface. The electrochemical corrosion behavior of the SNC low-carbon steel with different grain sizes was studied by electrochemical methods in 0.05 M sulfuric acid (H2SO4) + 0.05 M sodium sulfate (Na2SO4) aqueous solution. Grain sizes <35 am showed a strong effect on the electrochemical corrosion behavior. The corrosion rate of the SNC low-carbon steel increased with the decreasing of grain size. This was attributed to the increased number of the active sites caused by SNC low-carbon steel.
95 citations
TL;DR: In this article, a finite element method (FEM) approach was used to predict the residual stresses induced by laser Peening on a 12% Cr-martensitic stainless steel and a 7075 aluminium alloy.
Abstract: Benefits from laser Peening have been demonstrated several times in fields like fatigue, wear or stress corrosion cracking. However, in spite of recent work on the calculation of residual stresses, very few authors have considered a finite element method (FEM) approach to predict laser-induced mechanical effect. This comes mainly from the high strain rates involved during LP (10 6 s -1 ), that necessitate the precise determination of dynamic properties, and also from the possible combination of thermal and mechanical loadings in the case of LP without protective coatings. In this paper, we aim at presenting a global approach of the problem, starting from the determination of loading conditions and dynamic yield strengths, to finish with FEM calculation of residual stress fields induced on a 12% Cr martensitic stainless steel and a 7075 aluminium alloy.
94 citations
TL;DR: In this paper, a 3D representation of the shot peening problem with respect to DE modelling and contact interaction laws is established, and a new time stepping scheme that can ensure both short and long term stability of the contact models is developed.
Abstract: Following earlier work on the combined finite/discrete element simulation of shot peening process in 2D case, 3D representation of the problem is established with respect to DE modelling and contact interaction laws. An important relevant computational issue regarding the critical time step is carefully studied, and a new time stepping scheme that can ensure both short and long term stability of the contact models is developed. Numerical tests are performed to evaluate the proposed normal and frictional contact interaction laws with various model parameters. The influences of single and multiple shot impact, as well as element sizes are also numerically investigated. The established contact interaction laws can also be applied to other multi‐body dynamic simulations.
94 citations