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

doi:10.1016/j.scriptamat.2021.114216

상세 보기

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

Citations

WEB OF SCIENCE

66

Citations

SCOPUS

72

초록

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

DOI: 10.1016/j.scriptamat.2021.114216

발행일: 2021-12

유형: Article

저널명: Scripta Materialia

권: 205

언어: ENG

출판사: PERGAMON-ELSEVIER SCIENCE LTD

발행국가: 영국

ISSN: E 1872-8456
P 1359-6462