Densification Forming of Alumina Powder—Effects of Power Law Creep and Friction

[+] Author and Article Information
Y. S. Kwon, K. T. Kim

Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea

J. Eng. Mater. Technol 118(4), 471-477 (Oct 01, 1996) (7 pages) doi:10.1115/1.2805944 History: Received June 25, 1995; Revised February 24, 1996; Online November 27, 2007


High temperature forming processes of alumina powder compacts were analyzed by using constitutive equations which are capable of predicting densification and grain growth under diffusional creep and power law creep. Experimental results for alumina powder compacts were compared with finite element calculations by using the constitutive equations. The effects of friction between alumina powder compact and punches during sinter forging of alumina powder compacts were also investigated. Densification mechanism maps of alumina powder, which can be used for the optimization of various process variables, were constructed under hot pressing and general states of stresses.

Copyright © 1996 by The American Society of Mechanical Engineers
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