Topic: Structure Modulation and Property Optimization of Metallic Glasses

Speaker: Prof. J. Eckert
　　　　Director of the Erich Schmid Institute of Materials Science of the Austrian Academy of Sciences

Time: 13:30-15:30, (Tuesday) Sep. 25^th, 2018

Venue: Room 403，Shi Changxu Building, IMR CAS

Abstract:

Metallic glasses are known for their outstanding mechanical strength but limited plasticity. Significant progress has been made in recent years in how to optimize processing conditions for bulk glass formation, net-shape forming and the microscopic mechanism of failure. However, the details of the correlation between atomic structure, defects and thermo-mechanical treatments utilized for structure modification and their impact on shear band nucleation and propagation for achieving macroscopic ductility are still not well-understood.

This talk attempts to shed light on structural (re)ordering, recovery and rejuvenation mechanisms, as well as nanocrystallization phenomena in different metallic glasses when they are subjected to different casting conditions, relaxation or thermoplastic net-shaping. The findings will be discussed with respect to short- and medium-range order modulation, defect generation and annihilation, and precipitation of secondary phases. The structural changes will be correlated with changes in plastic deformability and failure mechanisms, and the effectiveness of composition tuning and thermo-mechanical processing for plasticity improvement will be analyzed in order to derive design aspects and processing guidelines for property optimization of metallic glasses.

Prof. J. Eckert is a well-known expert in the field of mechanical behavior of metallic glass/nanocrystalline materials. He is the sponsor and participant of several major international cooperative projects. His main research work includes: synthesis and characterization of nanocrystalline materials, thermal stability and phase shift of metastable alloys, nano intermetallic compound ordering and stability, grow-up characterization and grain boundary migration of nanocrystalline, the mechanical behavior of micro-nano composite structure. Professor Eckert has published more than 1000 SCI journal papers, and his works has been edited in more than 150 research books; his papers has been cited more than 56,000 times, with h-index up to 100, including more than 190 invited presentations at international conferences and at universities and research institutions.