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"Advanced technologies for Magnesium alloys"学术讲座

 

国家重点实验室学术讲座

SKL-AMM Seminar

 

题目/TitleAdvanced technologies for Magnesium alloys

报告人/SpeakerDr. Zamir Koren

报告人工作单位/AffiliationIsrael Institute of Metals, Technion R&D Foundation Ltd.

日期/Date20101011 周一October 11 (Monday), 2010

时间/Time10:00 ? 11:30 am

联系人/Contact叶丰教授,yefeng@skl.ustb.edu.cn

报告地点/Location:北京科技大学主楼 353,  353 Main Building, USTB

 

Dr. Zamir Koren

Director of the Israel Institute of Metals and head of the foundry laboratory. He got his Ph D at Materials Engineering, Ben-Gurion University, Sheva, Israel in 2003, MS degree at Materials Engineering, Technion University Israel in 1980, and BS degree at Civil Engineering Technion University Israel in 1976. His research interests include - Metal casting technologies; - Investment casting of ferrous and non-ferrous alloys; - Metal purification by directional solidification process; - Semi-solid casting of light alloys;  - Light metals matrices composites; - Fluxless recycling of Mg alloys; - Amorphous bulk metallic glass of Mg.

 

 

报告摘要/Abstract

Magnesium, one of the most abundant elements on earth, is the lightest structural material with good specific strength but slightly lower nominal mechanical properties (yield point, ultimate tensile strength and elongation) than aluminum. In order to widen its usage in the aerospace and automotive fields and replace aluminum components (which are heavier than magnesium components), we suggest a number of innovative technologies that have the potential to improve the properties of magnesium alloys:

 1. Semi-solid casting - the main advantages of this process are the improvement of deformability and the tolerance to heat treatments which enable to increase the mechanical properties.

2.  Reinforcing magnesium with micro-particles (MMMC) - improves the mechanical properties at room temperature and more significantly so at elevated temperatures though decreasing elongation as well.

3. Reinforcing magnesium with nano-particles (NMMC) - improves significantly the mechanical properties at room temperature and at elevated temperatures, increasing significantly the elongation as well.

4. Rapid solidification ? application of extreme cooling rate (up to 106K/sec) results in amorphous/nano structure with excellent mechanical properties including high stiffness.

5. Investment casting - development of technology for precision casting such as complicated geometry with very thin walls.