TY - JOUR

T1 - SPD Deformation of Pearlitic, Bainitic and Martensitic Steels

AU - Kapp, M. W.

AU - Hohenwarter, Anton

AU - Bachmaier, Andrea

AU - Müller, Timo

AU - Pippan, Reinhard

N1 - Publisher Copyright: ©2023 The Japan Institute of Metals and Materials .

PY - 2023

Y1 - 2023

N2 - The deformation behavior of nearly fully pearlitic, bainitic and martensitic steels during severe plastic deformation is summarized in this paper. Despite their significantly different yield stresses and their microstructures, their hardening behavior during SPD is similar. Due to the enormous hardening capacity the SPD deformation is limited by the strength of the tool materials. The microstructure at the obtainable limit of strain are quite similar, which is a nanocrystalline structure in the order of 10 nm, dependent on the obtainable strain. The nanograins are partially supersaturated with carbon and the grain boundaries are stabilized by carbon. Another characteristic feature is the anisotropy in grain shape which results in an anisotropy of strength, ductility and fracture toughness. The results are important for the development of ultra-strong materials and essential for this type of steels which are frequently used for application where the behavior under rolling contact and sliding contact is important.

AB - The deformation behavior of nearly fully pearlitic, bainitic and martensitic steels during severe plastic deformation is summarized in this paper. Despite their significantly different yield stresses and their microstructures, their hardening behavior during SPD is similar. Due to the enormous hardening capacity the SPD deformation is limited by the strength of the tool materials. The microstructure at the obtainable limit of strain are quite similar, which is a nanocrystalline structure in the order of 10 nm, dependent on the obtainable strain. The nanograins are partially supersaturated with carbon and the grain boundaries are stabilized by carbon. Another characteristic feature is the anisotropy in grain shape which results in an anisotropy of strength, ductility and fracture toughness. The results are important for the development of ultra-strong materials and essential for this type of steels which are frequently used for application where the behavior under rolling contact and sliding contact is important.

KW - high pressure torsion

KW - interface

KW - nanocomposite

KW - nanostructured

KW - strength

KW - wire drawing

UR - http://www.scopus.com/inward/record.url?scp=85164540206&partnerID=8YFLogxK

U2 - 10.2320/matertrans.MT-MF2022027

DO - 10.2320/matertrans.MT-MF2022027

M3 - Article

AN - SCOPUS:85164540206

VL - 64.2023

SP - 1353

EP - 1363

JO - Materials transactions

JF - Materials transactions

SN - 1345-9678

IS - 7

ER -