Research output: Contribution to journal › Article › peer-review
Superior Strength and Multiple Strengthening Mechanisms in Nanocrystalline TWIP Steel. / Kim, Jung Gi; Enikeev, Nariman A.; Seol, Jae Bok; Abramova, Marina M.; Karavaeva, Marina V.; Valiev, Ruslan Z.; Park, Chan Gyung; Kim, Hyoung Seop.
In: Scientific Reports, Vol. 8, No. 1, 11200, 25.07.2018.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Superior Strength and Multiple Strengthening Mechanisms in Nanocrystalline TWIP Steel
AU - Kim, Jung Gi
AU - Enikeev, Nariman A.
AU - Seol, Jae Bok
AU - Abramova, Marina M.
AU - Karavaeva, Marina V.
AU - Valiev, Ruslan Z.
AU - Park, Chan Gyung
AU - Kim, Hyoung Seop
PY - 2018/7/25
Y1 - 2018/7/25
N2 - The strengthening mechanism of the metallic material is related to the hindrance of the dislocation motion, and it is possible to achieve superior strength by maximizing these obstacles. In this study, the multiple strengthening mechanism-based nanostructured steel with high density of defects was fabricated using high-pressure torsion at room and elevated temperatures. By combining multiple strengthening mechanisms, we enhanced the strength of Fe-15 Mn-0.6C-1.5 Al steel to 2.6 GPa. We have found that solute segregation at grain boundaries achieves nanograined and nanotwinned structures with higher strength than the segregation-free counterparts. The importance of the use of multiple deformation mechanism suggests the development of a wide range of strong nanotwinned and nanostructured materials via severe plastic deformation process.
AB - The strengthening mechanism of the metallic material is related to the hindrance of the dislocation motion, and it is possible to achieve superior strength by maximizing these obstacles. In this study, the multiple strengthening mechanism-based nanostructured steel with high density of defects was fabricated using high-pressure torsion at room and elevated temperatures. By combining multiple strengthening mechanisms, we enhanced the strength of Fe-15 Mn-0.6C-1.5 Al steel to 2.6 GPa. We have found that solute segregation at grain boundaries achieves nanograined and nanotwinned structures with higher strength than the segregation-free counterparts. The importance of the use of multiple deformation mechanism suggests the development of a wide range of strong nanotwinned and nanostructured materials via severe plastic deformation process.
KW - HIGH-PRESSURE TORSION
KW - SEVERE PLASTIC-DEFORMATION
KW - STAINLESS-STEEL
KW - PHASE-TRANSFORMATION
KW - MICROSTRUCTURAL EVOLUTION
KW - GRAIN
KW - ALLOYS
KW - SEGREGATION
KW - MARTENSITE
KW - DUCTILITY
UR - http://www.scopus.com/inward/record.url?scp=85050674114&partnerID=8YFLogxK
UR - http://www.mendeley.com/research/superior-strength-multiple-strengthening-mechanisms-nanocrystalline-twip-steel
U2 - 10.1038/s41598-018-29632-y
DO - 10.1038/s41598-018-29632-y
M3 - Article
AN - SCOPUS:85050674114
VL - 8
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
IS - 1
M1 - 11200
ER -
ID: 33266127