The influence of age hardening and shot peening on the surface properties of 7075 aluminium alloy

Žagar, Sebastjan (author), Markoli, Boštjan (author), Naglič, Iztok (author), Šturm, Roman (author)

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.

• Language: English
• Keywords: aluminum alloy 7075, shot peening, microhardness, residual stresses, surface roughness
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering; NTF - Faculty of Natural Sciences and Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: 11 str.
• Numbering: Vol. 14, iss. 9, art. 2220
• PID: 20.500.12556/RUL-126855
• UDC: 620.1:669.715(045)
• ISSN on article: 1996-1944
• DOI: 10.3390/ma14092220
• COBISS.SI-ID: 62013443
• Publication date in RUL: 06.05.2021

Record is a part of a journal

• Title: Materials
• Shortened title: Materials
• Publisher: MDPI
• ISSN: 1996-1944
• COBISS.SI-ID: 33588485

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 01.05.2021

Secondary language

• Language: Slovenian
• Keywords: aluminijeva zlitina 7075, udarno utrjevanje, mikrotrdota, zaostale napetosti, površinska hrapavost

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0270
• Name: Proizvodni sistemi, laserske tehnologije in spajanje materialov