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Non-monotonic evolu...
Non-monotonic evolution of surface roughness in a stainless steel during cold deformation
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- Ottenklev, Fredrik (författare)
- Lund University
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- Adell, Martin (författare)
- Tetra Pak AB
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- Orlov, Dmytro (författare)
- Lund University,Lunds universitet,Materialteknik,Institutionen för maskinvetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Materials Engineering,Department of Mechanical Engineering Sciences,Departments at LTH,Faculty of Engineering, LTH
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(creator_code:org_t)
- Elsevier BV, 2021
- 2021
- Engelska.
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Ingår i: Materials Science and Engineering A. - : Elsevier BV. - 0921-5093. ; 799
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http://dx.doi.org/10... (free)
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Abstract
Ämnesord
Stäng
- In this study, polished and unpolished sheet samples of austenitic stainless steel 316L were tensile strained to investigate the evolution of surface roughness based on Sa- and Ra characteristics. In polished steel sheets, surface roughness increases with the increase of true strain up to a maximum of e = 0.14. Thereafter, roughness decreases until e = 0.26 for approximately 25%, and then becomes independent on strain. The highest roughness levels are found to be localised primarily around surface grain boundaries. The roughness-strain correlation can be explained by grain rotation and cross-slip. Unpolished sheets demonstrate near-linear relationship between tensile strain and surface roughening due to the presence of an oxide layer. The layer has a thickness of approximately 1 μm with a morphology resembling the microstructure in the substrate. When strained, it appears to show two roughness components. First one is a shortwave component originating at the oxide grain boundaries, which is believed to be produced by the rotation of underlying grains. The second one is a longwave component, which is generated by the fracture of oxide layer due to lower ductility. The slope of roughness – true strain relationship is found to be also grain orientation-dependent.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
Nyckelord
- Grains and interfaces
- Iron alloys
- Micromechanics
- Surface roughness
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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