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This work analyzes the effect of surface-localized laser heating treatment on the fatigue crack growth (FCG) rate on region II of the sigmoidal da/dN × ΔK curve of an aerospace-grade AA6013-T4 aluminum alloy sheet with 1.3 mm thickness. The influence on microstructure changes is also evaluated. Aiming to improve the FCG resistance without changing the mechanical behavior of the alloy, a Yb:fiber laser...
According to airworthiness requirements, the primary structure of a commercial aircraft must be designed to be damage tolerant in order to guarantee the aircraft structural integrity. For this reason, the crack propagation analysis of metallic materials is performed during the structural design development. It is known that compressive residual stresses enhance the performance of structural components...
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