The Influence of Age Hardening and Shot Peening on the Surface Properties of 7075 Aluminium Alloy |
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| Authors: | Sebastjan Ž agar,Boš tjan Markoli,Iztok Naglič ,Roman Š turm |
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| Affiliation: | 1.Faculty of Mechanical Engineering, Aškerčeva 6, 1000 Ljubljana, Slovenia;2.Faculty of Natural Sciences and Engineering, Aškerčeva 12, 1000 Ljubljana, Slovenia; (B.M.); (I.N.) |
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| Abstract: | The present study investigates the effect of shot peening (SP) on the mechanical properties and surface roughness of 7075 aluminum alloy during different stages and conditions of heat treatment. The mechanical properties were determined by measuring Vickers microhardness profiles and residual stress profiles, while the amount of alloying elements present in the solid solution of the samples under different heat treatment conditions was determined by measuring the electrical conductivity. The results show that the increase in microhardness near the SP surface and the maximum compressive residual stresses are mainly related to the content of alloying elements in the solid solution. Surface roughness increases with increasing SP Almen intensity, and samples with the highest microhardness and residual stresses have the lowest surface roughness. |
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| Keywords: | aluminum alloy 7075 shot peening microhardness residual stresses surface roughness |
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