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Dislocation Engineering: A Promising Alloy Design Strategy

Time: 15.00-16.00, April 19th, 2019, Friday

Venue: Meeting Room, 8th Floor, College of Material Science and Engineering

Speaker: Mingxin Huang, tenured vice-professor, College of Mechanical and Vehicle Engineering, University of Hong Kong


Abstract:

A new alloy design concept based on Dislocation Engineering is illustrated in the present work. This dislocation engineering concept has been successfully substantiated by the design and fabrication of a deformed and partitioned (D&P) steel with a yield strength of 2.2 GPa and an uniform elongation of 16% |1|. In the D&P steel, high dislocation density can not only increase strength but also improve ductility. Such Dislocation Engineering concept is further employed for other steels and Mg alloys, showing promising results. It opens a new window for alloy design.

[1JB.B. He, B. Hu, H.W. Yen, G.J. Cheng, Z.K. Wang. H.W. Luo*, M.X. Huang* 2017 "High dislocation density induced large ductility in deformed and partitioned steels", Science, 357, 1029

 

From Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Educaiton

College of Material Science and Engineering

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