Experimental Study of the Effect induced by Air Shot-Blasting Processing, Thermal Exposition and High Cycle Fatigue Tests on Physical and Mechanical Condition Hardening Layer of Cylindrical Samples of Alloys V95 and D16T

The influence of multicycle fatigue actions and thermal exposition, previously hardened in the rate of the air shot-blasting, on such characteristics of cylindrical samples made from alloys V95 and D16T as roughness and microhardness was researched. In fact, surface plastic hardening significantly affects the growth of microhardness in comparison with samples unhardened. Microhardness decreases to values corresponding to sample unhardened after thermal exposition. Surface hardening increases the roughness layer and further thermal exposition and fatigue tests have no effect on these parameters. Results of experimental measurements are presented in tables and graphs.