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

Jae-Kyung Han; Kunihisa Sugimoto; Megumi Kawasaki; Klaus-Dieter Liss

doi:10.1016/j.matlet.2022.132414

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

Jae-Kyung Han, Kunihisa Sugimoto, Megumi Kawasaki^*, Klaus-Dieter Liss^*

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

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.%.

Original language	English
Journal	Materials Letters
DOIs	https://doi.org/10.1016/j.matlet.2022.132414
State	E-pub ahead of print - 6 May 2022

Keywords

Aluminum alloy
Heterostructure
High-energy X-rays
High-pressure torsion
Phase transformation

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10.1016/j.matlet.2022.132414

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@article{50bafee3517b44e098f55f76bc40dfdb,

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

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.%.",

keywords = "Aluminum alloy, Heterostructure, High-energy X-rays, High-pressure torsion, Phase transformation",

author = "Jae-Kyung Han and Kunihisa Sugimoto and Megumi Kawasaki and Klaus-Dieter Liss",

year = "2022",

month = may,

day = "6",

doi = "10.1016/j.matlet.2022.132414",

language = "英语",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier",

}

TY - JOUR

T1 - Strain-dependent phase transformation mapping of diffusion-bonded nanocrystalline aluminum-magnesium by high-energy synchrotron X-rays

AU - Han, Jae-Kyung

AU - Sugimoto, Kunihisa

AU - Kawasaki, Megumi

AU - Liss, Klaus-Dieter

PY - 2022/5/6

Y1 - 2022/5/6

N2 - 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.%.

AB - 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.%.

KW - Aluminum alloy

KW - Heterostructure

KW - High-energy X-rays

KW - High-pressure torsion

KW - Phase transformation

U2 - 10.1016/j.matlet.2022.132414

DO - 10.1016/j.matlet.2022.132414

M3 - 文章

JO - Materials Letters

JF - Materials Letters

SN - 0167-577X

ER -

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

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Keywords

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