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Method and apparatus for semi-solid material processing

United States Patent

May 15, 2007
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A method of forming a material includes the steps of: vibrating a molten material at an ultrasonic frequency while cooling the material to a semi-solid state to form non-dendritic grains therein; forming the semi-solid material into a desired shape; and cooling the material to a solid state. The method makes semi-solid castings directly from molten materials (usually a metal), produces grain size usually in the range of smaller than 50 .mu.m, and can be easily retrofitted into existing conventional forming machine.
Han; Qingyou (Knoxville, TN), Jian; Xiaogang (Knoxville, TN), Xu; Hanbing (Knoxville, TN), Meek; Thomas T. (Knoxville, TN)
UT-Battelle LLC (Oak Ridge, TN)
10/ 871,180
June 17, 2004
The United States Government has rights in this invention pursuant to contract no. DE-AC05-00OR22725 between the United States Department of Energy and UT-Battelle, LLC.