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Development of a high-strength Al-Zn-Mg-Cu-based alloy via multi-strengthening mechanisms
- Won, Sung-Jae;
- So, Hyeongsub;
- Kang, Leeseung;
- Oh, Soong Ju;
- Kim, Kyou-Hyun
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70초록
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.
키워드
7xxx Series aluminum alloy; Mechanical properties; Symmetry quantification; Microalloying; 2-STEP AGING TREATMENT; MICROSTRUCTURAL EVOLUTION; MINOR SC; BEHAVIOR; PRECIPITATION; SCANDIUM; ZR; NUCLEATION; SYMMETRY; LATTICE
- 제목
- Development of a high-strength Al-Zn-Mg-Cu-based alloy via multi-strengthening mechanisms
- 저자
- Won, Sung-Jae; So, Hyeongsub; Kang, Leeseung; Oh, Soong Ju; Kim, Kyou-Hyun
- 발행일
- 2021-12
- 유형
- Article
- 권
- 205