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Development of Strain Induced Surface Topography of 6XXX Series Aluminum Sheet Under Balanced Biaxial Tension

Published

Author(s)

Stephen W. Banovic, Timothy J. Foecke

Abstract

With gas mileage goals set down in the Partnership for a New Generation of Vehicles as a driving force, the investigation into reducing overall vehicle weight by replacing conventional steel sheet metal with lightweight materials has been initiated. However, implementation of these lightweight alloys, specifically those that are Al-base, has been slow due to both a limited knowledge of material behavior and a lack of experience in the sheet forming process. By obtaining a better understanding of the material characteristics (e.g., surface roughening, friction, biaxial strain limits, and springback) during biaxial stretching, these materials can be more readily utilized for complex stamped components. Along these lines, the free surface roughening of aluminum alloys in the 6XXX series was studied as a function of balanced biaxial straining using the modified Marciniak in-plane stretching test. Through the use of x-ray diffraction techniques, the change in crystallographic texture of the sheet was determined as a function of the strain level. Modification of the surface topography was monitored through electron microscopy and surface roughness measurements. From these results, relationships between the as-received microstructure, true in-plane strain level, and free surface roughening were developed.
Proceedings Title
Automotive Alloys and Aluminum Sheet and Plate Rolling and Finishin Technology; Aluminum 2002, Symposia | | | Minerals, Metals, Materials Society
Conference Dates
February 1, 2002
Conference Title
Aluminum - Proceedings

Keywords

aluminum alloys 2002, formability, sheet metal, surface roughness, texture

Citation

Banovic, S. and Foecke, T. (2002), Development of Strain Induced Surface Topography of 6XXX Series Aluminum Sheet Under Balanced Biaxial Tension, Automotive Alloys and Aluminum Sheet and Plate Rolling and Finishin Technology; Aluminum 2002, Symposia | | | Minerals, Metals, Materials Society (Accessed May 20, 2024)

Issues

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Created February 1, 2002, Updated February 17, 2017