By K Ding

ISBN-10: 0849334446

ISBN-13: 9780849334443

ISBN-10: 1845691091

ISBN-13: 9781845691097

ISBN-10: 1855739291

ISBN-13: 9781855739291

Laser surprise peening (LSP) is a technique for inducing compressive residual stresses utilizing surprise waves generated via laser pulses. it's a really new floor therapy for metal fabrics which could vastly enhance their resistance to crack initiation and propagation caused by cyclic loading and fatigue. This booklet, the 1st of its variety, consolidates the scattered wisdom approximately LSP into one complete quantity. It describes the mechanisms of LSP and its colossal position in enhancing fatigue functionality when it comes to amendment of microstructure, floor morphology, hardness, and energy. specifically, it describes numerical simulation thoughts and methods that may be followed via engineers and study scientists to layout, review, and optimize LSP procedures in useful functions.

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Extra info for Laser shock peening Performance and process simulation

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Although some mechanistic modelling of LSP has been conducted in the past in order to understand the dynamic process of LSP, there have been some limitations, such as unsuitable assumptions, incorrect calculations and errors in the approaches. Apparently, the finite element method as an effective analytical tool is quite an attractive technique to evaluate the dynamic stresses and the distribution of compressive residual stresses in the materials induced by LSP. 46 • • • • Laser shock peening The metallurgical physics of LSP has not been deeply investigated.

1997). 91 mm showed that the fatigue strength was increased by 60–80%, from approximately 552–612 MPa to approximately 966–1035 MPa, although other details such as stress ratio and testing frequency were not given. LSP also successfully improved the fatigue performance of titanium alloys, such as Ti-6Al-4V used in turbine compressors and Inconel superalloys used in turbine hot sections. , 1997). LSP also significantly increased the resistance of titanium fan blades to early fatigue failure caused by foreign object damage (FOD).

Apparently, the finite element method as an effective analytical tool is quite an attractive technique to evaluate the dynamic stresses and the distribution of compressive residual stresses in the materials induced by LSP. 46 • • • • Laser shock peening The metallurgical physics of LSP has not been deeply investigated. Recent nano-indentation analysis of laser peened metals identified a number of phenomena previously missed that could affect the behaviour of the metal. Past research on explosively driven shock waves in metals was found to be a useful source of information to explain these phenomena.

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Laser shock peening Performance and process simulation by K Ding


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