lapovok-influenceofthestrain-2018.pdf (6.25 MB)
Influence of the strain history on TWIP steel deformation mechanisms in the deep-drawing process
journal contribution
posted on 2018-06-01, 00:00 authored by Rimma LapovokRimma Lapovok, Ilana Timokhina, A K Mester, Matthias WeissMatthias Weiss, A ShekhterA study of preferable deformation modes on strain path and strain level in a TWIP steel sheet was performed. Different strain paths were obtained by stretch forming of specimens with various shapes and tensile tests. TEM analysis was performed on samples cut from various locations in the deformed specimens, which had different strain paths and strain levels and the preferable deformation modes were identified. Stresses caused by various strain paths were considered and an analytical analysis performed to identify the preferable deformation modes for the case of single crystal. For a single crystal, in assumption of the absence of lattice rotation, the strain path and the level of accumulated equivalent strain define the preferable deformation mode. For a polycrystalline material, such analytical analysis is not possible due to the large number of grains and, therefore, numerical simulation was employed. For the polycrystalline material, the role of strain path diminishes due to the presence of a large number of grains with random orientations and the effect of accumulated strain becomes dominant. However, at small strains the strain path still defines the level of twinning activity. TEM analysis experimentally confirmed that various deformation modes lead to different deformation strengthening mechanisms.
History
Journal
Metallurgical and materials transactions AVolume
49Issue
6Pagination
2069 - 2083Publisher
SpringerLocation
New York, N.Y.Publisher DOI
Link to full text
ISSN
1073-5623Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2018, The Minerals, Metals & Materials Society and ASM InternationalUsage metrics
Keywords
strain pathTWIP steeldeformationdeep-drawingmaterials sciencemetalsmineralsScience & TechnologyTechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringINDUCED PLASTICITY STEELSTEXTURE EVOLUTIONGRAIN-ORIENTATIONMANGANESE STEELSFCC CRYSTALSDEPENDENCESIZESLIPMechanical Engineering
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