Effect of the shear layer on the etching behavior of 6060 aluminum extrusion alloys
- Author
- Alexander Lutz, Linsey Lapeire (UGent) , Tuan Nguyen Minh (UGent) , Kim Verbeken (UGent) , Herman Terryn and Iris De Graeve (UGent)
- Organization
- Abstract
- The occurrence of preferential grain etching (PGE) during alkaline etching of aluminum extrusion alloys from the 6XXX series is often linked to the presence of certain impurity elements such as zinc, causing an undesired etching appearance. In the presented work, an additional culprit in this context is identified, which has not been investigated yet. A clear relation between PGE and the presence of a subsurface shear layer is identified for extruded Al 6060 alloys containing 0.02 and 0.06 wt% Zn. This shear layer can be distinguished from the bulk of the metal by its difference in crystallographic texture as visualized by electron backscatter diffraction (EBSD). For the Zn enriched alloy, the //ND grains are etched away faster than grains with other orientations, resulting in the grainy appearance typical for PGE. Independent of the Zn content in the alloy, once the shear layer is removed and //ND grains are practically absent on the new surface, the depths variations caused by preferential etching disappear. Instead, the surface of the alloy is attacked uniformly by the caustic etch bath.
- Keywords
- aluminum alloys, EBSD, extrusion, preferential grain etching, shear layer, APPEARANCE
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-8634648
- MLA
- Lutz, Alexander, et al. “Effect of the Shear Layer on the Etching Behavior of 6060 Aluminum Extrusion Alloys.” SURFACE AND INTERFACE ANALYSIS, vol. 51, no. 12, 2019, pp. 1251–59, doi:10.1002/sia.6632.
- APA
- Lutz, A., Lapeire, L., Nguyen Minh, T., Verbeken, K., Terryn, H., & De Graeve, I. (2019). Effect of the shear layer on the etching behavior of 6060 aluminum extrusion alloys. SURFACE AND INTERFACE ANALYSIS, 51(12), 1251–1259. https://doi.org/10.1002/sia.6632
- Chicago author-date
- Lutz, Alexander, Linsey Lapeire, Tuan Nguyen Minh, Kim Verbeken, Herman Terryn, and Iris De Graeve. 2019. “Effect of the Shear Layer on the Etching Behavior of 6060 Aluminum Extrusion Alloys.” SURFACE AND INTERFACE ANALYSIS 51 (12): 1251–59. https://doi.org/10.1002/sia.6632.
- Chicago author-date (all authors)
- Lutz, Alexander, Linsey Lapeire, Tuan Nguyen Minh, Kim Verbeken, Herman Terryn, and Iris De Graeve. 2019. “Effect of the Shear Layer on the Etching Behavior of 6060 Aluminum Extrusion Alloys.” SURFACE AND INTERFACE ANALYSIS 51 (12): 1251–1259. doi:10.1002/sia.6632.
- Vancouver
- 1.Lutz A, Lapeire L, Nguyen Minh T, Verbeken K, Terryn H, De Graeve I. Effect of the shear layer on the etching behavior of 6060 aluminum extrusion alloys. SURFACE AND INTERFACE ANALYSIS. 2019;51(12):1251–9.
- IEEE
- [1]A. Lutz, L. Lapeire, T. Nguyen Minh, K. Verbeken, H. Terryn, and I. De Graeve, “Effect of the shear layer on the etching behavior of 6060 aluminum extrusion alloys,” SURFACE AND INTERFACE ANALYSIS, vol. 51, no. 12, pp. 1251–1259, 2019.
@article{8634648,
abstract = {{The occurrence of preferential grain etching (PGE) during alkaline etching of aluminum extrusion alloys from the 6XXX series is often linked to the presence of certain impurity elements such as zinc, causing an undesired etching appearance. In the presented work, an additional culprit in this context is identified, which has not been investigated yet. A clear relation between PGE and the presence of a subsurface shear layer is identified for extruded Al 6060 alloys containing 0.02 and 0.06 wt% Zn. This shear layer can be distinguished from the bulk of the metal by its difference in crystallographic texture as visualized by electron backscatter diffraction (EBSD). For the Zn enriched alloy, the //ND grains are etched away faster than grains with other orientations, resulting in the grainy appearance typical for PGE. Independent of the Zn content in the alloy, once the shear layer is removed and //ND grains are practically absent on the new surface, the depths variations caused by preferential etching disappear. Instead, the surface of the alloy is attacked uniformly by the caustic etch bath.}},
author = {{Lutz, Alexander and Lapeire, Linsey and Nguyen Minh, Tuan and Verbeken, Kim and Terryn, Herman and De Graeve, Iris}},
issn = {{0142-2421}},
journal = {{SURFACE AND INTERFACE ANALYSIS}},
keywords = {{aluminum alloys,EBSD,extrusion,preferential grain etching,shear layer,APPEARANCE}},
language = {{eng}},
location = {{Helsingor, DENMARK}},
number = {{12}},
pages = {{1251--1259}},
title = {{Effect of the shear layer on the etching behavior of 6060 aluminum extrusion alloys}},
url = {{http://doi.org/10.1002/sia.6632}},
volume = {{51}},
year = {{2019}},
}
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