Al-Si-Mg-Cu合金早期时效过程中组织和应变场的析出演变

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Philosophical Magazine Letters Pub Date : 2021-04-03 DOI:10.1080/09500839.2021.1873446

Chenyang Zhu, L. Dong, Bin Hu, Bing Chen

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引用次数: 1

摘要

采用高角环形暗场扫描透射电子显微镜(HAADF-STEM)和几何相分析(GPA)方法研究了高铜含量Al-Si-Mg-Cu合金早期时效过程中析出引起的显微组织演化和应变场变化。GP带的基本构建块和随后降水周围的阶梯状边缘被表征。溶质原子Si、Mg和Cu的加入导致GP区扩大，形成核壳结构，进一步析出转变。随着时效时间的延长和组织转变的进行，诱导应变场增大，导致试样的硬化。

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Evolution of microstructure and strain field by precipitation during early ageing of Al–Si–Mg–Cu alloy

ABSTRACT The evolution of microstructure and the variation of strain field induced by precipitation in Al–Si–Mg–Cu alloy with high copper content during early ageing is characterised by high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) and geometric phase analysis (GPA) calculations. The basic building blocks for GP zones and step-shaped edges around subsequent precipitation are characterised. Incorporation of solute atoms, namely Si, Mg and Cu, accounts for the expansion of GP zones with core–shell structure and further precipitation transformation. The induced strain field rises as the ageing time increases and structural transformation proceeds, which results in a hardening of the sample.

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来源期刊

Philosophical Magazine Letters 物理-物理：凝聚态物理

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

2.7 months

期刊介绍： Philosophical Magazine Letters is the rapid communications part of the highly respected Philosophical Magazine, which was first published in 1798. Its Editors consider for publication short and timely contributions in the field of condensed matter describing original results, theories and concepts relating to the structure and properties of crystalline materials, ceramics, polymers, glasses, amorphous films, composites and soft matter. Articles emphasizing experimental, theoretical and modelling studies on solids, especially those that interpret behaviour on a microscopic, atomic or electronic scale, are particularly appropriate. Manuscripts are considered on the strict condition that they have been submitted only to Philosophical Magazine Letters , that they have not been published already, and that they are not under consideration for publication elsewhere.