Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403

공학

한국표면공학회지 (51권6호 337-343)

Effect of Heat Treatment on Surface Wettability of Al-Si-Mg Alloy

열처리 조건에 따른 Al-Si-Mg계 합금의 표면 젖음성 영향

장호성;최유진;이승원;전종배;박성혁;신선미;
Jang, Hosung;Choi, Yoojin;Lee, Seungwon;Jeon, Jongbae;Park, Sunghyuk;Shin, Sunmi;

한국생산기술연구원 첨단정형공정그룹;울산대학교 첨단소재공학부;한국생산기술연구원 첨단표면공정그룹;경북대학교 신소재공학부;
Advanced Forming Process R&D Group, Korea Institute of Industrial Technology;School of Materials Science and Engineering, University of Ulsan;Advanced Surface Coatings & Processing R&D Group, Korea Institute of Industrial Technology;School of Materials Science and Engineering, Kyungpook National University;

DOI : 10.5695/JKISE.2018.51.6.337

Abstract

The present study investigated the effect of heat treatment process on the surface wettability of an Al-Si-Mg alloy. After solution-treated at $525^{circ}C$ and aged at $160^{circ}C$, the alloy showed high hardness due to the formation of precipitates. In addition, surface wettability was improved in such a way that the contact angle of distilled water droplet on the flat surface decreased to $37.6{sim}42.1^{circ}$ after the heat treatment. The surface energy predicted by Owens-Wendt equation also confirmed the increase of surface energy after the heat-treatment. However, when the surface roughness increased, the positive effect of the heat treatment on wettability diminished due to the geometrical factors of the rough surface.

Keywords

Aluminum alloy;Heat treatment;Wettability;Contact angle;