Isothermal oxidation tests of mechanically treated Ti-Beta-21S (TIMET, Ti–15Mo–3Nb–3Al–2Si, ASTM Grade 21) were performed under dry air at 650, 700 and 750 °C for 100 h compared to untreated samples. Two different mechanical surface treatments used: ultrasonic shot-peening (SP) laser-shock peening (LSP). The study investigates the effect both on kinetics process role atmospheric nitrogen insert...

Abstract Mechanical properties inherently possess uncertainties. Among these properties, fatigue behavior data generally shows significant scatter which introduces a challenge in the safe design of dynamically loaded components. These uncertainties are mainly results factors related to surface state including: Roughness, tensile residual stresses, scratches and notches at surface. Therefore, co...