A1 Journal article (refereed), original research

Effects of fabrication processes on the deformation capacity of S960 ultra-high strength steel


Publication Details
Authors: Amraei Mohsen, Dabiri Mohammad, Björk Timo, Skriko Tuomas
Publication year: 2016
Language: English
Related Journal or Series Information: Journal of Manufacturing Science and Engineering
Volume number: 138
Issue number: 12
JUFO-Level of this publication: 2
Open Access: Not an Open Access publication

Abstract
Deformation of a direct quenched type of ultra-high strength steel (UHSS) with low-carbon content is studied in this work. Although this material, as manufactured, combines high strength and good ductility, it is highly sensitive to the workshop fabrication processes used. The presence of stress concentration due to structural discontinuity or notch effects can accentuate the effect of fabrication processes on the deformation capacity of the material. To evaluate the influence of fabrication methods on deformation capacity, a series of tensile tests are done on both pure base material (BM) and after the steel has been subjected to heat input (HI) or cold forming (CF). To study the effect of HI due to welding or other heat-based workshop fabrication processes, the surface of the material was dressed by laser beam at controlled speed and laser intensity. CF effects were studied by bending the specimens to a predetermined angle prior to subjecting the steel to tensile testing. Experimental results were compared with numerical simulation using LS-DYNA simulation software. The generated results show acceptable agreement between experimental and numerical simulation outcomes.

Last updated on 2018-19-10 at 08:49

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