The Influence of Grain Size on the Roughening Behavior of Al-Mg Alloys

Published

January 1, 2001

Author(s)

Mark R. Stoudt, Richard E. Ricker

Abstract

The discontinuouis plastic flow exhibited by numerous aluminum alloys presents significant challenges to the use of aluminum alloys in many automotive applications. The inhomogeneous morphology of the surface asperities generated during metal forming is known to cause strain localization that can result in tearing during metal forming, and increased friction between mating die surfaces that results in accelerated die wear and progressively reduced shape accuracy in the metal stampings. The relationships between plastic strain, grain size and surface roughness typically use linear predictions that are inadequate for use in finite element simulations for die wear. The relationshps between these properites were evaluated in a commercial aluminum alloy to better understand the nature of the deviations from linear behavior. The results of this evaluation demonstrate the roughening process is more complex and the observed linear behavior may be the result of overlapping roughening mechanisms. These results also indicate that the distribution of slip may be the most influential feature in predicting the roughness-dependent behavior.

Citation

Innovations in Processing & Manufacturing of Sheet Materials

Volume

Innovations in Processing and Manufacturing of She

Pub Type

Journals

Keywords

aluminum sheet, metal forming, slip character, surface roughness

Citation

Stoudt, M. and Ricker, R. (2001), The Influence of Grain Size on the Roughening Behavior of Al-Mg Alloys, Innovations in Processing & Manufacturing of Sheet Materials (Accessed March 2, 2025)