Improvised surface property of Al-7075 alloy by laser shock peening technique

Abstract

The laser shock peening process helps in the alteration of surface roughness in metals and alloys to develop the mechanical properties of the tools. Q-switched Nd YAG laser of wavelength 1064 nm, with high energy with a pulse repetition rate of 5 Hz, and pulse duration of 4 ns employed to increase the surface feature and mechanical factors of Al-7075. The shock peening process rises the average roughness of the sample in the treated portion associated with the untreated area of the metal due to the deformation by shock waves talked into by plasma. Pulse width, laser energy, and wavelength are some of the indispensable factors for optimization in the peening process to progress the characterization of the specimen. The micro-hardness and roughness of the Al-7075 sample surface raise linearly with laser energy.