Actual Problems in Machine Building. Vol. 13. N 3-4. 2026 Innovative Technologies in Mechanical Engineering ____________________________________________________________________ 20 COMPARISON OF SURFACE LAYER QUALITY OF AMg6 AND D16T ALUMINUM ALLOYS UNDER SURFACE PLASTIC DEFORMATION Ivanova A. V., Post-graduate Student, e-mail: a.v.ivanova.2018@corp.nstu.ru Zelenina A.V., Post-graduate Student, e-mail: zelenina.2018@corp.nstu.ru Gileta V.P, Ph.D. (Engineering), Associate Professor, e-mail: v.gileta@corp.nstu.ru Novosibirsk State Technical University, 20 Prospekt K. Marksa, Novosibirsk, 630073, Russian Federation Abstract This study compares the effect of ultrasonic surface plastic deformation (USPD) and diamond burnishing (DB) on the surface layer quality of AMg6 and D16T aluminum alloys under identical processing conditions (P = 50 N, s = 0.107 mm/rev, v = 59 m/min). USPD consistently produces lower surface roughness Ra for both alloys and forms a cellular surface texture with a bearing ratio tp exceeding 95%, which is favorable for wear and corrosion resistance. However, microhardness behavior differs: DB achieves a higher hardness gain for the more ductile AMg6 alloy (ΔHV = 39.2%), while USPD outperforms DB for the harder D16T alloy (ΔHV = 30.7%, 230 HV vs. 203 HV). This contrast arises from differences in relaxation process intensity governed by alloy ductility and thermal conductivity. The results provide a basis for selecting the optimal finishing method depending on alloy properties. Keywords ultrasonic surface plastic deformation, aluminum alloys, surface roughness, microhardness, surface layer, diamond burnishing.
RkJQdWJsaXNoZXIy MTk0ODM1