논문 해외 국제전문학술지(SCI급) Microstructure and tensile properties of Mg–Zn–Gd casting alloys
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2013-11
- 저자명 J M Kim & J S Park
- 학술지명 International Journal of Cast Metals Research
- 발행처명 Taylor and Francis Online
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 2
홈페이지첨부 파일
논문 초록 (Abstract)
The effects of Gd additions to a Mg–3Zn based casting alloy on the microstructure and tensile properties at room and elevated temperature have been investigated. As cast microstructures of the Mg–Zn–Gd alloys consists principally of primary Mg and Mg–Gd–Zn phases. The maximum tensile strength at both room and 175°C was found to occur at 1–2%Gd, while the elongation was continuously reduced by increasing Gd content. The ultimate tensile strength of 1–2%Gd containing alloys was comparatively high (∼150 MPa) at 175°C. The tensile creep resistance was remarkably enhanced by the Gd additions, presumably due to the formation of Mg–Gd–Zn phases. Creep deformation of only ∼0·5% was observed after 200 h (175°C and 50 MPa) in the case of 3%Gd. It was found that hot cracking resistance was slightly reduced at 1–2%Gd but recovered at 3%Gd. No significant change of fluidity was found with respect to the Gd content.