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报告题目：Metall-intermetallic laminated composites, produced by explosive welding and heat treatment

报告人：A/Prof Ivan Bataev         

            Novosibirsk State Technical University, Russia.

时间：2017年6月23日上午10：00

地点：bt365官网亚洲版二楼会议室

个人简介

Ivan Bataev is currently an assistant professor since 2011. His research interest is materials science aspects of high speed and high energy phenomenon, including explosive welding, high-strain-rate deformation, laser and electron beam heating and multilayer composites. Prof. Ivan Bataev has published 39 scientific journal articles and conference papers. He has travelled and collaborated with many colleagues in Germany, France, UK and Japan.

报告摘要

In recent decades, Ti-Al intermetallics are receiving considerable attention due to their desirable combination of moderate price, high specific stiffness and strength (due to low density), and chemical resistance at elevated temperatures, which make them attractive for the aircraft industry, rocketry, chemical and mechanical engineering. However, the obvious drawback of intermetalllics, which prevents its application, is the room-temperature brittleness. Recently, several studies have shown that fabrication of metallic-intermetallic laminated (MIL) composites allows extending the application range of Al3Ti and other intermetallics.

In this lecture, an attempt to produce metallic intermetallic laminated composites by explosive welding and subsequent annealing is discussed. The structure of the composites was thoroughly investigated using scanning and transmission electron microscopy. Particular attention was paid to the structure of the mixing zones (vortexes) arising at the interfaces during explosive welding.

We found that preliminary explosive welding accelerated the formation of Al3Ti layer and made heat treatment duration four times shorter.