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2014 年 03 月 24 日
Seminar - Micromechanical Behavior of Super Duplex Stainless Steels by Dr. Ru Lin Peng

Date:   24 March 2014 (Monday)

Time:   11:00 am - 12:00 pm

Venue:  EF305, The Hong Kong Polytechnic University

Abstract:

Super Duplex stainless steels (SDSS) consist of a comparable amount of austenite and ferrite in its microstructure. While maintaining the excellent corrosion resistance of austenitic stainless steels, SDSS exhibit a much higher mechanical strength. With the increasing use of SDSS in load bearing structures in aggressive environments, there has been a growing research interest in understanding their micromechanical behavior, on which the macroscopic mechanical properties rests. This talk will present studies investigating the influence of microstructure on the micromechanical behavior of SDSS. By diffraction experiments under in-situ mechanical loading, interactions between the constituent phases and grain families are analyzed with respect to the differential phase properties and grain orientation dependent properties. In situ SEM/EBSD experiments revealing interactions between the microstructure and growing fatigue cracks will also be presented.

Biosketch:

Ru Lin Peng received her PhD degree in Engineering Materials from Linkoping University, Sweden in 1992. She worked at the Studsvik Neutron Diffraction Laboratory of Uppsala University before becoming a faculty member of Linkoping University in 2003. She is currently Associate Professor at the Department of Management and Engineering, Linkoping University.

Dr Peng has been working in the field of residual stresses and in particular neutron diffraction characterization of residual stresses for many years. Her current research interests include residual stresses due to manufacturing processes, the effect of residual stresses on materials’ behavior and properties, the micromechanical behavior of duplex stainless steels, and high temperature coatings.