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@ARTICLE{Brasche:888762,
author = {Brasche, Frederike and Haase, Christian and
Lipińska-Chwałek, Marta and Mayer, Joachim and Molodov,
Dmitri A.},
title = {{C}ombined κ-carbide precipitation and recovery enables
ultra-high strength and ductility in light-weight steels},
journal = {Materials science and engineering / A},
volume = {795},
issn = {0921-5093},
address = {Amsterdam},
publisher = {Elsevier},
reportid = {FZJ-2020-05191},
pages = {139928 -},
year = {2020},
abstract = {Light-weight high-manganese steels with high aluminum and
carbon contents are known to possess high age-hardening
potential due to the precipitation of nano-sized
κ-carbides. Although in recrystallized material the
precipitation of the κ-phase has been widely researched,
the influence of pre-deformation/deformation microstructure
on the formation of κ-carbides is still unknown. The
present study aims at gaining an increased understanding of
the underlying mechanisms (and their interplay) active
during annealing after pre-deformation, i.e. concurrent
strengthening by precipitation of κ-carbides and softening
by recovery/recrystallization. Therefore, a
Fe-29.8Mn-7.65Al-1.11C steel was age-hardened in
deformed/cold-rolled as well as in recrystallized condition.
The microstructure and tensile behavior of the material in
both states after annealing treatments at 600–800 °C were
investigated by means of light optical microscopy,
(high-resolution) scanning transmission electron microscopy,
x-ray diffraction and hardness measurements as well as
tensile tests. The focus was put on understanding the
interplay between microstructural defects (e.g.
dislocations), precipitation of κ-carbides, and
recovery/recrystallization. The fundamental dependence of
strengthening and softening mechanisms on the precondition,
annealing parameters and correlation with the mechanical
properties are discussed.},
cin = {ER-C-2},
ddc = {530},
cid = {I:(DE-Juel1)ER-C-2-20170209},
pnm = {143 - Controlling Configuration-Based Phenomena (POF3-143)
/ DFG project 29898171 - SFB 761: Stahl - ab initio.
Quantenmechanisch geführtes Design neuer
Eisenbasis-Werkstoffe (29898171)},
pid = {G:(DE-HGF)POF3-143 / G:(GEPRIS)29898171},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000576173800001},
doi = {10.1016/j.msea.2020.139928},
url = {https://juser.fz-juelich.de/record/888762},
}