典型文献
Correlation between precipitates evolution and mechanical properties of Al-Sc-Zr alloy with Er additions
文献摘要：
Correlation between precipitates evolution and mechanical properties of Al-Sc-Zr alloy with Er additions during isothermal ageing were investigated by microhardness measurements,transmission electron mi-croscopy,atom probe tomography and density functional theory-based simulations.The results demon-strate that the Er additions significantly improve the hardness during elevated temperature ageing,es-pecially at 400℃.This is mainly because Er additions increase the nucleation rate of the Al3(Er,Sc,Zr)precipitates,resulting in a higher density of fine and uniform dispersion of L12 structured nanoparticles.First-principles calculations demonstrate that the second nearest neighboring solute-solute interactions for the species Sc,Zr and Er are energetically favored-a key feature to rationalize the observed pre-cipitate structure and the underlying formation mechanism.The sequential formation of the core/shell precipitates in the Er-free alloy and core/double-shell precipitates in the Er-containing alloy arises due to the different solute-solute and solute-vacancy interaction energies,and the relative diffusivities of the Er,Sc and Zr species in Al.These results shed light on the beneficial effects of Er additions on the age-hardening behavior of Al-Sc-Zr alloy and provide guidance for designing the ageing treatments for the Al-Sc-Zr(-Er)alloys.
文献关键词：
中图分类号：
作者姓名：
Li Liu;Jian-Tang Jiang;Xiang-Yuan Cui;Bo Zhang;Liang Zhen;Simon P.Ringer
作者机构：
School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;China-Ukraine Institute of Welding,Guangdong Academy of Sciences,Guangzhou 510651,China;School of Aerospace,Mechanical and Mechatronic Engineering,and Australian Centre for Microscopy and Microanalysis,The University of Sydney,New South Wales 2006,Australia;School of Materials Science and Engineering,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China
文献出处：
引用格式：
[1]Li Liu;Jian-Tang Jiang;Xiang-Yuan Cui;Bo Zhang;Liang Zhen;Simon P.Ringer-.Correlation between precipitates evolution and mechanical properties of Al-Sc-Zr alloy with Er additions)[J].材料科学技术（英文版）,2022(04):61-72
A类：
cipitate
B类：
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AB值：
0.490565
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