Strengthening of A5052 aluminum alloy by high-pressure sliding process

Ahmad Muhammad Aziz, Intan Fadhlina Mohamed*, Zenji Horita, Mohd Zaidi Omar, Zainuddin Sajuri, Norinsan Kamil Othman, Junaidi Syarif, Mohamed Abdelgawad Gebril, Farhad Ostovan, Seungwon Lee, Kenji Matsuda, Manabu Yumoto, Yoichi Takizawa, Ammar Abdulkareem Hashim Al-Ameri

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A commercial purity of an Al-2mass% Mg alloy (A5052) was processed by severe plastic deformation using high-pressure sliding (HPS) for grain refinement. Mechanical properties and microstructures were examined after the HPS processing and subsequent annealing. Dislocation density decreased and grain growth occurred by the annealing. However, annealing at 150 °C led to an increase in the yield stress σy to 420 MPa as well as the strain hardening coefficient (n = 0.49) defined in Ludwik’s equation in comparison with σy=375MPa and n = 0.25 in the as-HPS-processed state. It was shown that a Hall–Petch relation holds with a coefficient, k = 0.16 MPa m−1/2. The ratio of Vickers harness to tensile stress (Hv/σTS) was ~ 3, while the ratio to the yield stress (Hv/σy) was 3.3–4.8. Furthermore, plotting of several SPD methods including this study for tensile strength against equivalent strain resulted in a linear relationship and indicated that the HPS process yielded the highest strengthening. The strengthening mechanism was evaluated for the HPS-processed A5052 alloy so that the dominant contribution to the strengthening was from the grain boundary hardening due to significant grain refinement, which was up to 70% of the total strength. Graphical abstract: (Figure presented.).

Original languageEnglish
JournalJournal of Materials Science
DOIs
StateAccepted/In press - 2024

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Science (miscellaneous)
  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering
  • Polymers and Plastics

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