발간논문

Home > KJMM 논문 > 발간논문

Vol.38, No.1, 71 ~ 78, 2000
Title
Pesearch Paper / Mechanical Behavior : Microstructural and Mechanical Properties of Deformation Processed Cu-Ag Alloys
임문수Moon Su Lim,송재숙Jae Sook Song,홍순익Sun Ig Hong
Abstract
The microstructural and mechanical stability of Cu-6 wt.%Ag alloys obtained by cold rolling combined with intermediate heat treatments have been investigated and compared with those of Cu-24wt.%Ag. The stress-strain responses and fracture behavior of Cu-6 wt.%Ag alloys were examined and correlated with the microstructual change caused by thermo-mechanical treatments. The linear white markings are thought to be deformation bands stabilized by silver atoms, not silver filaments as eutectic Cu-Ag alloy. The highly deformed microstructure stabilized by silver filament is unstable at temperatures above 300℃ because of the increase of the diffusivity of silver atoms. The strength of Cu-6 wt.%Ag alloys were found to be decreased remarkably if they were heat-treated above 300℃ for 1hr. The fracture surfaces of Cu-6 wt.%Ag alloys showed topical ductile type fracture. The electrical conductivity did not change appreciably up to the aging temperature of 200℃ and increased rapidly at temperatures above 300℃. The increase of the conductivity and the decrease of the strength can be associated with the coarsening and spheroidization of highly deformed linear band structure. The strengthening mechanism and microstructural stability were discussed based on the microstructural analyses.
Key Words
| PDF
대한금속∙재료학회 │ (06633) 서울시 서초구 서초대로 56길 38 대한금속∙재료학회 회관 (서초1동 1666-12번지)
Tel : 070-4266-1646 │ FAX : 02-557-1080 │ E-mail : metal@kim.or.kr
Copyright ⓒ 2013 사단법인 대한금속∙재료학회 All rights reserved.