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Strain-dependent phase transformation mapping of diffusion-bonded nanocrystalline aluminum-magnesium by high-energy synchrotron X-rays

Journal Article


Abstract


  • This study highlights the capability of high-energy synchrotron X-rays to investigate polymorphous phase transformation upon nanostructuring and diffusion bonding of Al and Mg through high-pressure torsion. The measurements providing diffraction peak profiles at a series of local positions over the sample volume allow mapping of gradual yet significant structural changes in the Al-Mg nanocrystalline alloy. The diffraction peaks involve apparent grain refinement broadening and compositional broadening with increasing shear strain. The results reveal strain-dependent transformations between f.c.c and h.c.p. phases with a sharp dissolution at strains of ���2500 and subsequent homogenization towards the formation of an Al supersaturated solid solution with the Mg concentration of ���14���15 at.%.

Publication Date


  • 2022

Citation


  • Han, J. K., Sugimoto, K., Kawasaki, M., & Liss, K. D. (2022). Strain-dependent phase transformation mapping of diffusion-bonded nanocrystalline aluminum-magnesium by high-energy synchrotron X-rays. Materials Letters, 321. doi:10.1016/j.matlet.2022.132414

Scopus Eid


  • 2-s2.0-85129949096

Web Of Science Accession Number


Volume


  • 321

Issue


Place Of Publication


Abstract


  • This study highlights the capability of high-energy synchrotron X-rays to investigate polymorphous phase transformation upon nanostructuring and diffusion bonding of Al and Mg through high-pressure torsion. The measurements providing diffraction peak profiles at a series of local positions over the sample volume allow mapping of gradual yet significant structural changes in the Al-Mg nanocrystalline alloy. The diffraction peaks involve apparent grain refinement broadening and compositional broadening with increasing shear strain. The results reveal strain-dependent transformations between f.c.c and h.c.p. phases with a sharp dissolution at strains of ���2500 and subsequent homogenization towards the formation of an Al supersaturated solid solution with the Mg concentration of ���14���15 at.%.

Publication Date


  • 2022

Citation


  • Han, J. K., Sugimoto, K., Kawasaki, M., & Liss, K. D. (2022). Strain-dependent phase transformation mapping of diffusion-bonded nanocrystalline aluminum-magnesium by high-energy synchrotron X-rays. Materials Letters, 321. doi:10.1016/j.matlet.2022.132414

Scopus Eid


  • 2-s2.0-85129949096

Web Of Science Accession Number


Volume


  • 321

Issue


Place Of Publication