Development of a high-strength Al-Zn-Mg-Cu-based alloy via multi-strengthening mechanisms

被引：49

作者：

Won, Sung-Jae ^{[1
,2
]}

So, Hyeongsub ^{[1
,2
]}

Kang, Leeseung ^{[2
]}

Oh, Soong Ju ^{[1
]}

Kim, Kyou-Hyun ^{[2
]}

机构：

[1] Korea Univ, Dept Mat Sci & Engn, Seoul 02841, South Korea

[2] Korea Inst Ind Technol, Korea Russia Innovat Ctr, Incheon 22004, South Korea

来源：

SCRIPTA MATERIALIA | 2021年 / 205卷

关键词：

7xxx Series aluminum alloy; Mechanical properties; Symmetry quantification; Microalloying; 2-STEP AGING TREATMENT; MICROSTRUCTURAL EVOLUTION; MINOR SC; BEHAVIOR; PRECIPITATION; SCANDIUM; ZR; NUCLEATION; SYMMETRY; LATTICE;

D O I：

10.1016/j.scriptamat.2021.114216

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We develop high-strength of Al-Zn-Mg-Cu-based alloys (7xxx series) by optimizing the amount of Mg/Cu with a trace addition of Sc. The highest mechanical properties are achieved with sigma(UTS)=672 MPa (sigma(y) = 644 MPa) and epsilon = 8.6%. Based on quantitative symmetry measurements, the improved mechanical strength originates from nanoscopic structural distortion caused by the excessive solutes of Mg and Cu as the amount of Mg/Cu increases. In addition, Sc microalloying induces grain refinement, thus enhancing the mechanical properties. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页数：5

共 43 条

[1]

[Anonymous], 2009, STANDARD TEST METHOD

[2] ABSORPTIVE FORM-FACTORS FOR HIGH-ENERGY ELECTRON-DIFFRACTION [J].