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Title: Method and apparatus for semi-solid material processing

Abstract

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.

Inventors:
 [1];  [1];  [1];  [1]
  1. Knoxville, TN
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
909347
Patent Number(s):
7,216,690
Application Number:
10/871,180
Assignee:
UT-Battelle LLC (Oak Ridge, TN)
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Han, Qingyou, Jian, Xiaogang, Xu, Hanbing, and Meek, Thomas T. Method and apparatus for semi-solid material processing. United States: N. p., 2007. Web.
Han, Qingyou, Jian, Xiaogang, Xu, Hanbing, & Meek, Thomas T. Method and apparatus for semi-solid material processing. United States.
Han, Qingyou, Jian, Xiaogang, Xu, Hanbing, and Meek, Thomas T. 2007. "Method and apparatus for semi-solid material processing". United States. https://www.osti.gov/servlets/purl/909347.
@article{osti_909347,
title = {Method and apparatus for semi-solid material processing},
author = {Han, Qingyou and Jian, Xiaogang and Xu, Hanbing and Meek, Thomas T},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/909347}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2007},
month = {5}
}

Works referenced in this record:

Rheocasting
journal, September 1976


Redistribution of Particles during Solidification.
journal, January 1995


Particle pushing: the concentration of particles near a solid interface during downward flow
journal, July 1994


Behavior of metal alloys in the semisolid state
journal, May 1991


Rheological behavior of Sn-15 pct Pb in the crystallization range
journal, July 1972


Semisolid metal processing
journal, January 1994