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

Strain-dependent phase transformation mapping of diffusion-bonded nanocrystalline aluminum-magnesium by high-energy synchrotron X-rays
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高能同步加速器 X 射线对扩散结合纳米晶铝镁的应变相关相变图

DOI:
10.1016/j.matlet.2022.132414
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发表时间:
2022
期刊:
影响因子:
3
通讯作者:
Liss, Klaus-Dieter
Liss, Klaus-Dieter
中科院分区:
材料科学3区
文献类型:
--
作者:
Han, Jae-Kyung;Sugimoto, Kunihisa;Kawasaki, Megumi;Liss, Klaus-Dieter

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该研究强调了高能同步x射线研究Al和Mg在纳米结构和高压扭转下的多晶相转变的能力。测量提供了样品体积上一系列局部位置的衍射峰剖面,可以绘制Al-Mg纳米晶合金中逐渐但显着的结构变化。随着剪切应变的增加,衍射峰出现明显的晶粒细化展宽和成分展宽。结果表明,f.c.和h.c.p.相之间发生了应变依赖的转变,在应变为~ 2500时急剧溶解,随后均匀化,形成Al过饱和固溶体,Mg浓度为~ 14-15 at.%。
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 betweenf.c.candh.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.%.
DOI: 10.1038/s41598-019-53614-3
发表时间: 2019-11
期刊: Scientific Reports
影响因子: 4.6
作者:
Jae-Kyung Han;K. Liss;T. Langdon;M. Kawasaki
通讯作者: Jae-Kyung Han;K. Liss;T. Langdon;M. Kawasaki
DOI: --
发表时间: 1963
期刊:
影响因子: --
作者:
H. Luo;C. Chao;P. Duwez
通讯作者: P. Duwez