报告内容摘要：

With the nature of high strain rate impact loading, dynamic plastic deformation (DPD) has been proved an efficient method to produce nano-twin structures in low stacking fault energy metals and alloys with fcc crystal structure. Our research work shows that DPD can also change the deformation behavior of high stacking fault energy Al alloys.  It is found that a large fraction of micro deformation bands could form in Al-7Mg alloy during DPD process at low deformation strains. With increasing deformation strain, the deformation bands gradually evolved into in-coherent twins in Al-7Mg alloy.  The deformation  mechanisms of Al-Mg alloys are discussed by using first principle calculations.
 
报告人简介：

2013·8——至今 挪威科技大学材料科学与工程系任职教授；2008·1——2013年9月 挪威科技工业研究院任职高级研究员； 2005·4——2007·12月 于Hydro aluminium任职冶金研究专家； 2004·4——2005·3月 于挪威奥斯陆大学攻读博士后； 2000·8——2004·3月 于挪威科技大学攻读博士后； 1994——1997于哈尔滨工业大学攻读博士； 1988——1994于吉林工业大学完成本硕学业。

研究领域：Solidification and casting; Homogenization and phase transformation; SPD and bulk nc/UFG materials; Grain boundary engineering; Materials simulation by first principles calculation; Microstructure simulation models; Advanced materials characterization (SEM, (S)TEM, EBSD and XRDD)
 
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