报告题目一：Metallic glass formation by mechanical alloying（机械合金化制备金属玻璃）
报告人：C. Suryanarayana 教授, 中佛罗里达大学
报告题目二：Additive Manufacturing – A Metallurgical Perspective （增材制造-冶金学角度）
报告人： Prashanth Konda Gokuldoss 副教授，挪威科技大学
报告时间：2018年6月25日（星期一）上午9:00 -11:00
报告地点：国家金属材料近净成形工程技术研究中心（38号楼）301会议室
欢迎广大师生踊跃参加!
机械与汽车工程学院
2018年6月15日
报告人简介:
Professor C. Suryanarayana is currently a Professor at the University of Central Florida (UCF) in Orlando. He obtained his Ph.D. from Banaras Hindu University in Varanasi, India. His main research expertise includes non-equilibrium processing of materials. His other research interests include metallic glasses, bulk metallic glasses, and coatings. He has published over 350 technical papers and authored/edited 21 books and conference proceedings. He has also been a member of the editorial boards of several international journals.
Professor Suryanarayana is a Fellow of ASM International, Fellow of the Institute of Materials, Minerals and Mining, London, UK, and Fellow of the Electron Microscope Society of India. He is one of the most cited researchers in the field of materials science and engineering. He has over 18,000 citations to his research work with an h-index of 50 and i-10 index of 167. According to Thomson Reuters, he is as one of the top 40 researchers in the world in the field of materials science who achieved the highest citation impact scores for their papers published since January 2000.
Asso. Prof. Dr.-Ing. Prashanth Konda Gokuldoss is an Associate Professor in Additive Manufacturing at the Department of Manufacturing and Civil Engineering; Norwegian University of Science and Technology, Gjøvik, Norway and at the same time holds Guest Scientist position at the Erich Schmid Institute of Materials Science, Austrian Academy of Science, Leoben, Austria. He will be taking charge as a Full Professor in Additive Manufacturing at the Department of Mechanical and Industrial Engineering, Tallinn University of Technology, Tallinn, Estonia from August 2018. He is a world-leading researcher in the field of Additive Manufacturing. He has authored nearly 100 peer-reviewed papers and has delivered Plenary talk, Keynote lectures and invited talks at various reputed conferences like ISMANAM, RQ, THERMEC, EMN Lecture series etc. He is an active reviewer of almost 50 International journals and is guest-editor for two focused issues on Additive Manufacturing.
报告摘要一：
Metallic glasses are relatively novel materials that lack crystallinity. Consequently, they exhibit an interesting combination of properties such as high strength, good corrosion resistance and excellent soft magnetic properties. Although considered brittle, novel approaches have rendered some of them reasonably ductile. They have found interesting applications in a variety of fields. Metallic glasses have been traditionally synthesized by rapid solidification processing of liquid alloys as ribbons, filaments, or powder and more recently as bulk glassy rods with a maximum diameter of about 80 mm. A few metallic glasses have also been produced by deposition methods in the form of thin films. These methods have restrictions on what type of alloys can be made glassy. Mechanical alloying, a high-energy powder processing method, is capable of producing glassy phases from a variety of combinations of metal powders. These glassy powders can then be consolidated to full density by different techniques such as hot isostatic pressing and spark plasma sintering. We have undertaken very detailed investigations of glass formation by mechanical alloying methods in a number of alloy systems. The present talk, however, will focus only on multicomponent iron-based alloys. After providing a brief background of metallic glasses and mechanical alloying, the presentation will discuss about the glass-forming ability, influence of alloying elements, and the relatively recently observed phenomenon of mechanical crystallization.The scientific principles learnt using this simple technique to understand the complex behavior of metallic glasses will be highlighted.
报告摘要二：
Laser based powder bed fusion processes like the selective laser melting (SLM) is one of the additive manufacturing processes used to produce 3-D metal parts by selective melting of powders dictated by CAD data. Because of the high degree of freedom given by processing through additive manufacturing, it is possible to build parts with extremely complex geometries that would otherwise be difficult or impossible to produce using conventional manufacturing processes. However, more than the shape and the functionalities that SLM process offers, the metallurgical features offered by the SLM process is more interesting. Some of them are very high cooling rates good enough to produce bulk metallic glasses, very complex and unique microstructures and tunable properties, related to the microstructure as well. Hence, the present talk will focus of the interesting metallurgical aspects in the field of SLM/AM.
