Sheet cladding of Al-Mg/Mg-Li/Al-Mg at room temperature

H. Matsumoto, S. Watanabe, S. Hanada

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

To develop corrosion resistant Mg alloy sheet the three-layered composite sheet consisting of Al-Mg/Mg-Li/Al-Mg was fabricated by clad rolling at room temperature, and their microstructures and mechanical properties have been investigated at various annealing conditions after clad rolling. No detectable crack, void and reaction phase are observed at a joint interface in the clad sheets as-rolled and subsequently annealed at 423 and 473 K. Annealing at and above 523 K results in the formation of reaction phases of LiMgAl2 and Al3Mg2 at Al-Mg alloy side and a high Mg content phase at Mg-Li side. The width of the reaction phases is broadened with annealing by lattice diffusion control, where the growth constant K(m2/s) of LiMgAl2, Al3Mg2 and high Mg content phase at 573 K is calculated to be 1.3 × 10-15m2/s, 9.0×10-15m2/s and 3.9×10-15m 2/s, respectively. Crack propagation is observed only through the reaction phases, leading to interface debonding in 90 degrees bending test and tensile test. It is concluded that the three layered clad sheet shows good ductility and high strength on annealing at low temperatures such as 423 and 473 K where the formation of reaction phases is suppressed.

Original languageEnglish
Pages (from-to)446-451
Number of pages6
JournalMaterials Forum
Volume29
Publication statusPublished - 2005 Sep 5

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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