报告题目:Mechanical characterization and additive manufacturing across length scales
报 告 人:邹宇 博士 (麻省理工学院)
时 间:2017年6月28日(周三) 15:00
地 点:五山校区14号楼205会议室
报告摘要: Throughout history, exploration of different length scales – both large and small – have fundamentally reshaped human understanding of the physical world and catalyzed industrial growth. Now, the fast development of nanotechnology and advanced manufacturing challenges us to deeply understand material properties at small sizes and develop new manufacturing methodologies. Towards this vision, in the first part of my seminar I will explore mechanical properties of materials at the micrometer and nanometer scales. I will share insights on mechanical characterization of emerging nanostructured high-entropy alloys, in which I achieve mechanically strong (yield strength of ~10 GPa) and thermally stable (after annealing at 1100 °C for 3 days) materials. Then, I will demonstrate superior room-temperature ductility and high strength-to-density ratios (~1 MJ/kg) of typically brittle quasicrystals at small sizes.
In the second part, I will also talk about my research on “building the big from the small” based on selective laser melting – a metal additive manufacturing process. I will demonstrate a strategy for the selection of the most optimized parameters for “3D printing”. In closing, I will present my future work: 1) development of gradient porous metals for biomedical implantation; 2) discovery of low-density, high-strength, and thermally stable alloys for aerospace applications.
报告人简介:邹宇博士于2007年、2010年、2015年毕业于北京航空航天大学、加拿大麦吉尔大学、瑞士苏黎世联邦理工学院,分别获得材料学学士、硕士、博士学位。2015年底至今,在美国麻省理工学院从事博士后研究。他专注于小尺度金属材料3D打印研究,特别集中在小尺度材料力学性能,高熵合金,准晶体,冷喷涂成型,激光增材制造等的研究。已发表SCI论文14篇,其中以第一作者发表在Nature Communications, Nano Letters, Acta Materialia, Scripta Materialia发表论文12篇。