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: The residual stresses that develop during the wear of AISI-SAE 1018 and 4340 steels have been examined in this article, where the entire three-dimensional stress tensor was obtained.
40 citations
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TL;DR: In this article, the effect of laser peening with different laser pulse energies on 6061-T6 aluminum alloy, the fatigue fracture morphologies evolution process at various fatigue crack growth (FCG) stages and the corresponding strengthen mechanism were investigated.
Abstract: To deeply understand the effect of laser peening (LP) with different laser pulse energies on 6061-T6 aluminum alloy, the fatigue fracture morphologies evolution process at various fatigue crack growth (FCG) stages and the corresponding strengthen mechanism were investigated. At the initial stage of FCG, more fatigue micro-cliffs were found after LP, while the fatigue striation spacing simultaneously reduced. A “stop-continue” phenomenon of crack propagation was discovered for laser peened samples. The fatigue striation spacing at the middle stage of FCG increased significantly while compared with that at the initial stage, in addition, the fatigue striation spacing decreased with an increase in laser pulse energy. Fracture morphologies in transition region of laser peened samples exhibit a mixing fracture characteristic of striations and dimples. The laser peened sample with laser pulse energy of 7 J presents more circuitous growing paths. Due to the complex stress state induced by LP, dimples with different sizes appeared in the final fracture region.
40 citations
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TL;DR: In this article, the role of workpiece temperature on plastic deformation mode during shot peening has been investigated for two titanium alloys: commercially pure titanium and a near-α alloy.
40 citations
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06 Aug 2007TL;DR: In this article, a laser shock peening process for producing one or more compressive residual stress regions in a medical device is disclosed. But the method is not suitable for the application of medical devices.
Abstract: A laser shock peening process for producing one or more compressive residual stress regions in a medical device is disclosed. A high-energy laser apparatus can be utilized to direct an intense laser beam through a confining medium and onto the target surface of a workpiece. An absorption overlay disposed on the target surface of the workpiece absorbs the laser beam, inducing a pressure shock wave that forms a compressive residual stress region deep within the workpiece. Medical devices such as stents, guidewires, catheters, and the like having one or more of these compressive residual stress regions are also disclosed.
40 citations
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TL;DR: In this article, a physics-based model has been developed for laser shock peening with femtosecond (fs) laser pulses (fs-LSP), which has never been reported in literature to the best knowledge.
40 citations