Mapping of micro-strain and macro-strain evolution by shot, laser-shock, and cavitation shotless peening using neutron transmission

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Peening is a surface treatment method to improve the fatigue life of engineering components. Recent development of peening technique such as laser-shock and cavitation shotless peening were introduced as an alternative to conventional shot peening. Previous study has shown that cavitation shotless peening (CSP) was not only introduce macro-strain onto the surface of components but also simultaneously relieve micro-strain of quenched metallic materials. In order to get a better understanding on the mechanism and the...
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