Browse > Article
http://dx.doi.org/10.5228/KSPP.2005.14.7.635

Evaluation of Mechanical Properties for Magnesium Sheet Forming by Tension and Compression Tests  

Oh, S. W. (부산대학교 정밀기계공학과)
Choo, D. K. (부산대학교 정밀기계공학과)
Lee, J. H. (동아대학교 신소재공학과)
Kang, C. G. (부산대학교 기계공학부)
Publication Information
Transactions of Materials Processing / v.14, no.7, 2005 , pp. 635-641 More about this Journal
Abstract
The crystal structure of magnesium was hexagonal close-packed (HCP), so its formability was poor at room temperature. But formability was improved in high temperature with increasing of the slip planes. Purpose of this paper was to know about the mechanical properties of magnesium alloy (AZ31B), before warm and hot forming process. The mechanical properties were defined by the tension and compression tests in various temperature and strain-rate. As the temperature was increased, yield·ultimate strength, K-value, work hardening exponent (n) and anisotropy factor (R) were decreased. But strain rate sensitivity (m) was increased. As strain-rate increased, yield·ultimate strength, K-value, and work hardening exponent (n) were increased. Also, microstructures of grains fined away at high strain-rate. These results would be used in simulations and manufacturing factor fer warm and hot forming process.
Keywords
Magnesium Sheet; AZ31; Mechanical Properties; Strain Rate; Recrystalization;
Citations & Related Records
연도 인용수 순위
  • Reference
1 T. Obara, H. Yoshinaga, S. Morozumi, 1973, {1122} <1123> slip system in magnesium, Acta Metall., Vol.21, pp. 845-853   DOI   ScienceOn
2 E. Yukatake, J. Kaneko, M. Sugamata, 2003, Anisotropiy and non-uniformity in plastic behavior of AZ31 magnesium alloy plates, Materials Transactions, Vol 44, No.4, pp, 452-457   DOI   ScienceOn
3 원성연, 오상균, K. Osakada, 박진기, 김영석, 2004, AZ31 마그네숨 합금 판재의 기계적 특성 평가(1), 2004 년도 한국소성가공학회 춘계학술대회논문집 , pp. 53-56
4 제 2 회 한.일마그네슘 신산업기술 공동워크샵, 2004, (사)한국마그네슘기술연구조합
5 이병호, 신광선, 이종수, 2004, AZ31 Mg 합금의 가공 조건에 따른 고온 성형성 연구, 2004 년도 한국소성가공학회 춘계학술대회논문집, pp. 80-83
6 ASM SPECIAL HANDBOOK, 1999, Magnesium and magnesium alloys
7 한형기, 유연철, 2001, SCM 440 강재의 동적 재결정 조직 변화에 관한 연구, 한국소성가공학회지, 제 10 권, 제 1 호, pp. 35-41
8 김영석,2003, 소성역학, 시그마프레스
9 Y. Xuyue, M. Hiromi, S. Taku, 2002, Dynamic evolution of fine grin structure during hot deformation of an AZ31 magnesium alloy, 輕金屬, 第 52 卷, 第 7 號, pp. 318-323
10 T. Morishita, H. Takuda, T. kinoshita, N. Shirakawa 2003, Flow stress of a magnesium alloy AZ31 Sheet at elevated temperatures, The Proceeding of the 54th Japanese joint Conference for the Technology of plasticity