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Semi-solid Rheo-forming of Aluminum Alloy by LSPSF Technology

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Tuesday, January 24, 2017, 11 am– 12 pm

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Materials Science and Engineering Seminar

Dr. Xubo Liu
School of Mechanical Engineering
Nanchang University, Nan chang, China

Abstract: Semi-solid processing is considered as the most promising near-net shape technology in the 21st century. The semi-solid rheo-forming technology includes two steps: the semi-solid slurry preparation and rheo-forming with the slurry. With the technology of LSPSF (Low Superheat Pouring with a Shear Field), the high quality semi-solid slurry, having the size of primary phase of around 50 μm and the shape factor of around 0.85, an aluminum alloy was made. At Nanchang University, the rheo-forming experiments were combined with the pressure casting and squeezing casting. The aluminum parts made with the semi-solid rheo-forming technology and using the high quality slurry, were found to have higher mechanical properties than the same parts manufactured through traditional liquid casting. After appropriate thermal treatments, the semi-solid rheo-formed parts nearly reached mechanical properties of the parts made using a forging technology.

Bio: Dr Xubo Liu is an associate professor of the school of mechanical engineering at Nanchang University, China. His research interests include the development of new methods and design of new equipment for semi-solid reho-forming technology in application for aluminum and magnesium alloys. He has published more than 20 peer-reviewed technical papers, holds 3 patents related to his research field. Since the end of December 2016, Dr. Liu is a visiting scholar at Michigan Technological University, and his research activities will concentrate on processing of zinc alloys for the biomedical application.

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