江西省轻质高强结构材料重点实验室学术报告(十一)

 

江西省轻质高强结构材料重点实验室学术报告(十一)

 

报告题目：High-performance magnesium and alloys at room temperature

报告人：曾卓然，莫纳什大学（Monash University），材料科学与工程系

报告时间：2018年11月23日（星期五）下午2：00

报告地点：机电楼D210

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主办单位： 江西省轻质高强结构材料重点实验室

南昌大学机电工程学院

南昌大学科学技术处

                                      2018年11月22日

报告人简介：

曾卓然，莫纳什大学助理讲师，博士。2011年6月和2016年1月别获得莫纳什大学硕士学位（一等荣誉）和博士学位。已在本领域顶级期刊Nature Communications, Acta Materialia, Scripta Materialia发表12篇论文，4项镁发明专利的关键发明人。2017年受邀在高影响力期刊International Materials Reviews上发表一篇综述文章。现担任Acta Materialia, Metallurgical and Materials Transaction A, Materials Science and Engineering A, Scientific Reports, Journal of Alloys and Compounds等国际期刊的审稿人。研究方向包括轻合金的设计和开发,金属材料的变形和再结晶, X射线和电子衍射的应用。

 

报告摘要：

摘要：Magnesium is the lightest structural metal and as a result of its high strength to density ratio has the potential to reduce material usage and increase the energy efficiency of transport vehicles compared with steel and aluminium. However, the magnesium has lower strength, and is intrinsically difficult to form at room temperature. In this presentation, how to improve the alloy strength and formability by microstructural design will be demonstrated. It will be shown that the traditionally difficult-to-form metal can become super-formable even at room temperature. Despite possessing a strong texture, super-formable magnesium is capable of being cold rolled to a strain at least eight times that possible in conventional magnesium processing. With respect to strengthening, cost-effective Mg-Al-Zn-Mn and Mg-Al-Zn-Ca-Mn alloys (with ≤ 1 wt.% Ca) were developed, revealing a tensile yield strength up to 413 MPa which is amongst the highest recorded strength in rare earth free magnesium alloys. The underlying mechanism will be discussed. These findings provide a new pathway for designing and developing high performance products from magnesium and other hexagonal metals that are traditionally difficult to form at room temperature.