主讲人：Upadrasta Ramamurty 南洋理工大学 教授

时间：2026年5月25日  15:30

地点：三一大楼409-1

报告摘要：

Currently, there is considerable scientific as well as technological interest in additive manufacturing (AM)of alloys. The lion's share of the research work has been on techniques such as the laser powder bed fusion(LPBF). Binder jet printing (BJP)-in spite of being relatively less expensive-has not received as muchattention. In the recent past, we have investigated the microstructures, mechanical properties (including fatigueand fracture responses), and corrosion and stress corrosion cracking resistances of two common stainless steels(316L and 17-4 PH) that are produced using the BJP technique, and compared them with those produced usingconventional manufacturing (casting followed by high temperature thermo-mechanical processing) and theLPBF techniques. In general, the porosity levels in the as-sintered BJP alloys tend to be relatively high, whichmandates the additional post-processing step of hot isostatic pressing (HIP). Our studies also include HIPsamples, to critically ascertain its utility. Many of the results are surprising and belie the expectations from theconventional and well-established structure - property correlations. I shall describe them in this talk, with thehope to enthuse interested researcher to pursue the BJP alloys.

主讲人简介：

Professor Upadrasta Ramamurty obtained a PhD degree in 1994 fromBrown University, USA. Following post-doctoral stints at the University of California - Santa Barbara and theMassachusetts Institute of Technology, he held faculty positions at the Nanyang Technological University,Singapore and the Indian Institute of Science, Bangalore, India, before returning to NTU in 2018 where he iscurrently the President's Chair Professor of Mechanical and Aerospace Engineering and Materials Science andEngineering. His current research interests include deformation and fracture behaviour of alloys and additivemanufacturing. He published 438 papers in peer reviewed iterational journals (-32,400 citations with a currenth-index of 93) and is an editor of Acta Materialia and Scripta Materialia. He is an elected Fellow of both theNational Academies of Engineering and Sciences of India, and the TWAS- The World Academy of Sciences, andis a recipient of the Shanti Swarup Bhatnagar and TWAS prizes.