关于举行加拿大瑞尔森大学陈道伦院士学术报告会的通知

发布时间:2019-05-15设置

报告题目:Fatigue and deformation of magnesium alloys
报 告 人:陈道伦(加拿大瑞尔森大学终身教授)
报告时间:2019年5月23日 星期四 下午 15:00--17:00
报告地点:机械与汽车工程学院38号楼303大会议室
欢迎广大师生积极参加!
 
 
机械与汽车工程学院
2019年5月15日
 
报告人简介:
陈道伦,加拿大工程院院士(FCAE),加拿大矿业,冶金和石油协会会士(FCIM),英国材料,矿物和采矿协会会士(FIMMM),加拿大多伦多瑞尔森大学机械和工业工程系教授。1983年和1986年分别获东北大学工学学士和硕士学位,1989年获中国科学院金属研究所博士学位, 1993年获得奥地利维也纳大学博士学位。陈博士在先进材料和关键工程材料的变形、疲劳、焊接等领域发表了379篇同行评审论文,撰写了193篇非同行评审会议论文和研究报告。他在纳米复合材料方面取得突破性成就,其中一种强度计算方法是以他的名字命名的,并且相关论文两次被加拿大科学院理事会确定为“Top 1%高被引论文”。陈博士是安大略省长卓越研究奖, MetSoc卓越研究奖, MetSoc杰出科学家奖, Sarwan Sahota杰出学者奖,加拿大金属物理奖和加拿大机械工程学会G.H. Duggan勋章的获得者,是《Materials Research Letters》、《Materials and Design》、《Materials Science and Engineering A》等30种国际期刊的副主编或编委会成员,并受邀对发表在《Nature》和《Science》杂志上的一些重大科学问题进行评论。更多相关信息可以查看其个人网页https://people.ryerson.ca/dchen/biography.html.
 
报告摘要:
Lightweighting is one of the most effective strategies to reduce fuel consumption and anthropogenic CO2 emissions, since a 10% weight reduction brings about a 6~8% fuel efficiency gain. It has recently been depicted as the “storm of lightweighting” – a revolution in materials, processes, and business models – which is brewing on the horizon of the automotive industry. Magnesium alloy, as an ultra-lightweight metallic material, has recently received significant attention due to its superior strength-to-weight ratio. However, the hexagonal close-packed crystal structure of magnesium alloys limits the availability of slip systems and leads to strong mechanical anisotropy and tension-compression yield asymmetry owing to the presence of crystallographic texture and deformation twinning. For the components subjected to dynamic loading, such asymmetry could exert an adverse effect on the material performance and compromise the structural integrity and durability of highly-loaded structural components. This issue could be conquered through weakening the basal texture via the addition of rare-earth (RE) elements and other alloying elements to refine grains and generate nano-sized precipitates.To safeguard the structural integrity, durability, and safety of load-bearing structural components, understanding the characteristics and mechanisms of deformation and fatigue of magnesium alloys is of vital importance. In this presentation, several examples on the cyclic deformation behavior of extruded magnesium alloys with and without RE elements will be presented. Moreover, twinning, twin growth, and twin-twin interactions during uniaxial compression in the extrusion direction and de-twinning in the transverse direction will also be discussed.
 

附件:

返回原图
/