Abstract
Laser shock processing or laser peening has become an advanced and promising surface treatment technique and has been shown to be effective in increasing the resistance of metallic components to high-cycle fatigue (HCF), stress corrosion cracking (SCC), wear, etc., through imparting compressive residual stress on the surface of a number of metals and alloys. The higher laser energy/power density could induce the deeper effect layer, larger action area, and better treatment effect. The property of damage tolerance has become the design concept and selection criterion of breakage-safety of meeting the requirements for advanced aircraft and engine structural integrity. The TC4-DT is two phases titanium alloy of damage tolerance with high fracture toughness and resistance fatigue extension through com
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