Method and apparatus for semi-solid material processing

Patent · Tue May 15 00:00:00 EDT 2007

OSTI ID:909347

Han, Qingyou ^[1]; Jian, Xiaogang ^[1]; Xu, Hanbing ^[1]; Meek, Thomas T ^[1]

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1. Knoxville, TN

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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• Assignee: UT-Battelle LLC (Oak Ridge, TN)
• Patent Number(s): 7,216,690
• Application Number: 10/871,180
• OSTI ID: 909347
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE