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The activities of the Polish Metrological Union are financed from the funds of the Ministry
of Education and Science as part of a targeted subsidy for the implementation of the task titled
“Establishment and Coordination of the activities of the Polish Metrological Union (PMU)” under
contract No. MEiN/2021/DPI/179. This research was partially supported by the Mechanical
Engineering Discipline Fund of Lublin University of Technology (Grant No. FD-20/IM-5/071).
This article presents an analysis of the impact of vibratory shot peening on the surface
roughness and physical properties of the Ti6Al4V titanium alloy surface layer after milling. The
elements of machine parts and structures made of titanium alloys are often exposed to variable loads
during operation. Therefore, it is advisable to apply methods that enhance functional properties
and increase the durability of interacting components. Increasing the operational durability of such
elements can be achieved by vibratory shot peening. Variable amplitudes A = 24; 33; 42; 51; 60 mm
and times t = 1; 7; 13; 19; 25 min were applied. It has been demonstrated that it is possible to achieve a
threefold reduction in the roughness parameter, Sa = 0.344 μm, compared with milling, Sa = 0.95 μm .
An increase in Smr(c) areal material ratio was observed after vibratory shot peening compared with
milling. It has been shown that amplitude has a greater impact on the increase in hardening of the
surface layer gh compared with time. The highest rate of change in surface roughness and thickness of
the hardened layer was achieved at a vibratory shot-peening time of t = 13 min. The greatest thickness
of the hardened layer, exceeding 200 μm, was obtained after shot peening with an amplitude of
A = 60 mm.
