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Publications (5 of 5) Show all publications
Wadman, B., Ottosson, P., Holmberg, J., Ingemarsson, L.-O. & Sagström, E. (2013). Time-dependent residual stress and geometry analysis of UHSS deep drawn components,. In: Proceedings of International Deep Drawing Research Group Conference, Zurich, Switzerland, June 2-5.: . Paper presented at International Deep Drawing Research Group Conference, Zurich, Switzerland, June 2-5..
Open this publication in new window or tab >>Time-dependent residual stress and geometry analysis of UHSS deep drawn components,
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2013 (English)In: Proceedings of International Deep Drawing Research Group Conference, Zurich, Switzerland, June 2-5., 2013Conference paper, Oral presentation with published abstract (Other academic)
National Category
Materials Engineering
Identifiers
urn:nbn:se:ri:diva-31871 (URN)
Conference
International Deep Drawing Research Group Conference, Zurich, Switzerland, June 2-5.
Available from: 2017-10-17 Created: 2017-10-17 Last updated: 2019-06-18Bibliographically approved
Heikkilä, I., Wadman, B., Thoors, H. & Bay, N. (2012). Clean forming of stainless steel and titanium products by lubricious oxides. In: Proceedings of NORDTRIB, Trondheim: NTNU , 2012: . Paper presented at 15th Nordic Symposium on TribologyTrondheim 13-15 June 2012; Trondheim, Norway.
Open this publication in new window or tab >>Clean forming of stainless steel and titanium products by lubricious oxides
2012 (English)In: Proceedings of NORDTRIB, Trondheim: NTNU , 2012, 2012Conference paper, Published paper (Refereed)
Abstract [en]

Big social benefits can be attained through increased use of stainless steel or titanium in new sheet metal applications. Unfortunately, forming of these materials is often a challenging and costly operation, that can lead to environmental and health problems when solving the technical limitations. One possible method to overcome these problems is to use an oxide layer with optimised properties to reduce friction during forming, either as a substitute to lubricants, or acting as a conversion layer for environmental friendly lubricants. The most beneficial group of oxides for low friction is called lubricious oxides with a rutile crystal structure. Oxides of Ti, Mo, V, and Zn can build rutiles under certain contact temperatures during rolling and forming. The aim of this investigation is to evaluate if oxides designed on metal sheets display a lubricious effect under conditions similar to industrial forming processes. Preliminary evaluations show a beneficial influence of two oxides types, on stainless steel and on titanium. More work is needed to test the lubricating effect in other forming operations and to analyse the sustainability aspects for products manufactured with this alternative surface.

Keywords
lubricious oxides, friction, sheet metals, sliding contact, forming
National Category
Engineering and Technology
Identifiers
urn:nbn:se:ri:diva-34246 (URN)978-82-14-05270-1 (ISBN)
Conference
15th Nordic Symposium on TribologyTrondheim 13-15 June 2012; Trondheim, Norway
Available from: 2018-07-18 Created: 2018-07-18 Last updated: 2019-07-31Bibliographically approved
Wadman, B., Madsen, E., Schedin, E., Bay, N. & Bergström, F. (2012). Tooling Solutions for Sheet Metal Forming and Punching of Lean Duplex Stainless Steel. In: H. Leitner (Ed.), TOOL 2012 - Proceedings of the 9th International Tooling Conference: . Paper presented at 9th International Tooling Conference - Leoben, Austria, September 11-14 (pp. 621-629).
Open this publication in new window or tab >>Tooling Solutions for Sheet Metal Forming and Punching of Lean Duplex Stainless Steel
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2012 (English)In: TOOL 2012 - Proceedings of the 9th International Tooling Conference / [ed] H. Leitner, 2012, p. 621-629Conference paper, Published paper (Refereed)
Abstract [en]

For producers of advanced stainless components the choice of stainless material influences not only the product properties, but also the tooling solution for sheet metal stamping. This work describes how forming and punching tools will be affected when introducing the stainless alloys ferritic EN1.4509 and lean duplex EN1.4162 in a production designed for austenitic stainless steels, such as EN1.4301 and 1.4401. The result is a guideline that summarizes how stainless material properties may affect tool degradation, and suggests tool solutions for reduced production disturbances and tool maintenance cost.

National Category
Materials Engineering
Identifiers
urn:nbn:se:ri:diva-34248 (URN)
Conference
9th International Tooling Conference - Leoben, Austria, September 11-14
Available from: 2018-07-18 Created: 2018-07-18 Last updated: 2019-06-18Bibliographically approved
Billur, E., Demiralp, Y., Groseclose, A., Wadman, B. & Altari, T. (2011). Factors affecting the accuracy of flow stress determined by the bulge test (ed.). In: Special Edition: 10th International Conference on Technology of Plasticity, ICTP 2011: . Paper presented at 10th International Conference on Technology of Plasticity, ICTP 2011 (pp. 726-731).
Open this publication in new window or tab >>Factors affecting the accuracy of flow stress determined by the bulge test
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2011 (English)In: Special Edition: 10th International Conference on Technology of Plasticity, ICTP 2011, 2011, p. 726-731Conference paper, Published paper (Refereed)
Abstract [en]

The determination of the flow stress curve at room temperature, using the bulge test under biaxial deformation conditions, has been extensively studied. However, two Issues still deserve close examination: (1) validity of assuming a spherical bulge shape and (2) the effects of yield criterion and/or normal anisotropy. In this paper, we present experimental measurements to validate spherical assumption, as well as a methodology to calculate flow stress curves, all the way up to the failure point, that are free from the effects of anisotropy. Experimental studies were conducted on draw quality steel (DQS) and several grades of Dual Phase (DP) Advanced High Strength Steels (AHSS). © 2011 Wiley-VCH Verlag GmbH & Co. KGaA. Weinheim.

Keywords
Bulge test, Material characterization, Sheet forming
National Category
Materials Engineering
Identifiers
urn:nbn:se:ri:diva-13425 (URN)2-s2.0-84898065381 (Scopus ID)9783514007840 (ISBN)
Conference
10th International Conference on Technology of Plasticity, ICTP 2011
Available from: 2016-09-22 Created: 2016-09-22 Last updated: 2019-06-18Bibliographically approved
Svensson, T., Wadman, B. & de Maré, J. (2000). Determination of the fatigue limit method and problems. (ed.). Paper presented at .
Open this publication in new window or tab >>Determination of the fatigue limit method and problems.
2000 (English)Report (Refereed)
Series
ITM Report
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-5357 (URN)1532 (Local ID)1532 (Archive number)1532 (OAI)
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2019-06-18Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-4274-0918

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