Microstructural characterization and mechanical properties of AlMg alloy fabricated by additive friction stir deposition

Zhikang Shen, Mingtao Zhang, Dongxiao Li, Xinyu Liu, Shaolong Chen, Wentao Hou, Yuquan Ding, Zhonggang Sun, Yu Su, Wenya Li, Yanhong Tian

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

This work investigates the microstructure characterization and mechanical properties of Al alloy fabricated by additive friction stir deposition (AFSD). Microstructure characterizations of the Al alloy 5B70 base material (BM) and build were compared using optical microscope (OM) and electron back scattered diffraction (EBSD). The hardness distribution in the direction perpendicular to the cross-section of the deposited area was systematically evaluated. Tensile tests were performed on the BM and the build using digital image correlation (DIC), and the real-time stress distribution states of the specimens were analyzed. After the tensile tests, the fracture micromorphology was characterized using scanning electron microscope (SEM). The results indicated that a high degree of recrystallization occurred in the deposition zone, where fine, equiaxed, and differently oriented grains are formed. It was found that the strength of the deposition layer was lower compared to that of the BM, but its toughness was significantly improved. Also, obvious anisotropy of mechanical properties was identified in the deposition layer.

Original languageEnglish
Pages (from-to)2733-2741
Number of pages9
JournalInternational Journal of Advanced Manufacturing Technology
Volume125
Issue number5-6
DOIs
StatePublished - Mar 2023

Keywords

  • 5B70 Al alloy
  • Additive friction stir deposition
  • Mechanical properties
  • Microstructural characterization

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