Direct observation of dislocation plasticity in high-Mn lightweight steel by in-situ TEM

SD Kim, JY Park, SJ Park, JH Jang, J Moon, HY Ha… - Scientific reports, 2019 - nature.com
… pronounced planar glide of the dislocations and of the dislocation interaction at the slip band
… The dislocations in the pile-ups have a mixed character with a large screw component (the …

Novel ultra-high-strength (ferrite+ austenite) duplex lightweight steels achieved by fine dislocation substructures (Taylor lattices), grain refinement, and partial …

SS Sohn, H Song, BC Suh, JH Kwak, BJ Lee, NJ Kim… - Acta Materialia, 2015 - Elsevier
… The lightweight steel used in this study was fabricated by a vacuum induction melting method,
… Thus, planar slip characteristics occurring in the present steels cannot be explained by the …

Achievement of high yield strength and strain hardening rate by forming fine ferrite and dislocation substructures in duplex lightweight steel

H Song, J Yoo, SS Sohn, M Koo, S Lee - Materials Science and …, 2017 - Elsevier
Lightweight steels containing a considerable content of Al show high specific strength and
… Here we design new duplex lightweight steel in order to complement the drawbacks, and …

Strengthening and strain hardening mechanisms in a precipitation-hardened high-Mn lightweight steel

MJ Yao, E Welsch, D Ponge, SMH Haghighat… - Acta Materialia, 2017 - Elsevier
… in an aged high-Mn lightweight steel (Fe-30.4Mn-8Al-1.2C, wt.… are primarily sheared by
lattice dislocations, gliding on the … dislocation while the latter is of mixed dislocation character. …

Mechanism of twinning induced plasticity in austenitic lightweight steel driven by compositional complexity

ZH Lai, YH Sun, YT Lin, JF Tu, HW Yen - Acta Materialia, 2021 - Elsevier
characteristics of lightweight steel and TWIP steel, … dislocation confinement, is assessed in
this work, and it has been successfully applied to TWIP steel, TRIPLEX steel, lightweight steel, …

A new hot-rolled lightweight steel with ultra-high strength and good ductility designed by dislocation character and transformation strain

C Song, H Wang, Z Sun, J Xu, H Chen, W Yin - Scripta Materialia, 2022 - Elsevier
… Thus, in this work, there are more screw dislocations existing at the lath boundaries of the
5Si steel compared with that of 0Si and 3Al steels. This can improve the mobile ability of lath …

Strain hardening by dynamic slip band refinement in a high-Mn lightweight steel

E Welsch, D Ponge, SMH Haghighat, S Sandlöbes… - Acta Materialia, 2016 - Elsevier
… the strain hardening in high-Mn lightweight steels that are based on grain subdivision by …
clusters on the dislocation glide character, dislocation patterning and dislocation banding is …

Characterization of twin-like structure in a ferrite-based lightweight steel

PD Nezhadfar, A Zarei-Hanzaki, SS Sohn… - Metals and Materials …, 2016 - Springer
… the possibility and character of banded structures in ferrite-based lightweight steel. To this
… , due to the <111> dislocation slip limitations, the dislocation would be dissociated into three …

Strain hardening recovery mediated by coherent precipitates in lightweight steel

SD Kim, SJ Park, JH Jang, J Moon, HY Ha, CH Lee… - Scientific reports, 2021 - nature.com
Lightweight steels are realized by adding the characteristic light element, ie, Al, where 1 wt.
% reduces the specific weight of steels by … of dislocation dynamics, we examined dislocation

The microstructure evolution and room temperature deformation behavior of ferrite-based lightweight steel

PD Nezhadfar, A Zarei-Hanzaki, SS Sohn… - Materials Science and …, 2016 - Elsevier
… Thus, the deformation characteristics of constituent phases might strongly affect the … of the
experimental steel, and the narrow separation width of partial dislocations in ferritic structure …