Impact of severe plastic deformation on microstructure and fracture toughness evolution of a duplex-steel
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in: Materials science and engineering: A, Structural materials: properties, microstructure and processing, Jahrgang 703.2017, Nr. 4 August, 04.08.2017, S. 173-179.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
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TY - JOUR
T1 - Impact of severe plastic deformation on microstructure and fracture toughness evolution of a duplex-steel
AU - Schwarz, K. T.
AU - Kormout, Karoline
AU - Pippan, Reinhard
AU - Hohenwarter, Anton
PY - 2017/8/4
Y1 - 2017/8/4
N2 - The application of duplex steels is constantly increasing due to their excellent combination of high strength and fracture toughness complemented with superior resistance to localized chemical corrosion and stress corrosion. Since ultrafine-grained and nanocrystalline metals have shown improved mechanical and physical properties compared to their coarse grain counterparts, a further optimization of duplex steels could be realized by an additional nano-structuring process. Therefore, in the present study, a conventional duplex steel (X2CrNiMoN22-5-3) was deformed by high pressure torsion (HPT). The evolution of the microstructure and hardness upon deformation was examined. Special attention was devoted to the change of fracture toughness induced by HPT. In order to take grain shape changes during deformation into account, specimens with different orientations with respect to the principal shear deformation direction were tested. A pronounced anisotropy in the crack propagation behavior depending on the specimen orientation combined with an exceptional increase of strength was discovered.
AB - The application of duplex steels is constantly increasing due to their excellent combination of high strength and fracture toughness complemented with superior resistance to localized chemical corrosion and stress corrosion. Since ultrafine-grained and nanocrystalline metals have shown improved mechanical and physical properties compared to their coarse grain counterparts, a further optimization of duplex steels could be realized by an additional nano-structuring process. Therefore, in the present study, a conventional duplex steel (X2CrNiMoN22-5-3) was deformed by high pressure torsion (HPT). The evolution of the microstructure and hardness upon deformation was examined. Special attention was devoted to the change of fracture toughness induced by HPT. In order to take grain shape changes during deformation into account, specimens with different orientations with respect to the principal shear deformation direction were tested. A pronounced anisotropy in the crack propagation behavior depending on the specimen orientation combined with an exceptional increase of strength was discovered.
KW - Anisotropy
KW - Duplex steels
KW - Fracture toughness
KW - High-pressure-torsion
KW - Severe plastic deformation
UR - http://www.scopus.com/inward/record.url?scp=85025608143&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2017.07.062
DO - 10.1016/j.msea.2017.07.062
M3 - Article
AN - SCOPUS:85025608143
VL - 703.2017
SP - 173
EP - 179
JO - Materials science and engineering: A, Structural materials: properties, microstructure and processing
JF - Materials science and engineering: A, Structural materials: properties, microstructure and processing
SN - 0921-5093
IS - 4 August
ER -