Kind of uniform strengthening methods of turbine blade subjected to varied square-spot laser shock peening with stagger multiple-layer
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United States of America Patent
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Sep 13, 2018
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Sep 9, 2015
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Sep 9, 2015
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Abstract
A method for laser shock peening (LSP) to uniformly strengthen metallic components uses varied square-spot LSP with stagger multiple-layer. Each layer is subjected to square-spot LSP treatment, without overlapping. The length of square-spot in the first layer is larger than those in the second layer and third layers, and the length of square-spot in the second layer is equal to that in the third layer. The first layer treated by LSP is used to reduce deeper localized compressive residual stress, and the second and third layers imparted by square-spot LSP with staggered distance are used to eliminate of the boundary effect and decrease surface roughness.
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