A general perspective of Fe–Mn–Al–C steels

OA Zambrano - Journal of materials science, 2018 - Springer
During the last years, the scientific and industrial community has focused on the astonishing
properties of Fe–Mn–Al–C steels. These high advanced steels allow high-density reductions …

Planar slip-driven fatigue crack initiation and propagation in an equiatomic CrMnFeCoNi high-entropy alloy

K Suzuki, M Koyama, S Hamada, K Tsuzaki… - International Journal of …, 2020 - Elsevier
High-cycle fatigue crack initiation and propagation in an equiatomic CrMnFeCoNi high-
entropy alloy were investigated using smooth specimens. The microstructural deformation …

Overview of dynamic strain aging and associated phenomena in Fe–Mn–C austenitic steels

M Koyama, T Sawaguchi, K Tsuzaki - isij international, 2018 - jstage.jst.go.jp
This paper presents an overview of the recent works on dynamic strain aging (DSA) of Fe–
Mn–C austenitic steels including Hadfield and twinning-induced plasticity (TWIP) steels …

Crystal plasticity FEM study of material and mechanical effects on damage accumulation mode of fatigue crack propagation

B Chen, S Hamada, W Li, H Noguchi - International Journal of Fatigue, 2023 - Elsevier
To quantify the material and mechanical effects on the damage accumulation (DA) mode of
fatigue crack propagation (FCP), a crystal plasticity finite element method was used in a …

Effects of ε-martensitic transformation on crack tip deformation, plastic damage accumulation, and slip plane cracking associated with low-cycle fatigue crack growth

YB Ju, M Koyama, T Sawaguchi, K Tsuzaki… - International Journal of …, 2017 - Elsevier
Fatigue crack propagation behavior and associated plastic strain evolution in the vicinity of
crack planes were investigated at different crack lengths for Fe-30Mn-6Al, Fe-30Mn-4Si-2Al …

Growth behavior of a mechanically long fatigue crack in an FeCrNiMnCo high entropy alloy: A comparison with an austenitic stainless steel

S Mizumachi, M Koyama, Y Fukushima, K Tsuzaki - isij international, 2020 - jstage.jst.go.jp
The fatigue crack growth characteristics of an Fe20Cr20Ni20Mn20Co high-entropy alloy
(HEA) were investigated by ΔK increasing compact tension test in comparison with …

Visualization of dislocations through electron channeling contrast imaging at fatigue crack tip, interacting with pre-existing dislocations

K Habib, M Koyama, T Tsuchiyama… - Materials Research …, 2018 - Taylor & Francis
The dislocation pattern at the tip of a non-propagating fatigue crack in an Fe-25Cr-1N steel
(mass%) was characterized by electron channeling contrast imaging. Planar dislocation …

Effect of strain localization on fatigue properties of precipitation-hardened steel with an arbitrarily length crack

VK Verma, CK Gopalakrishnan, S Hamada… - International Journal of …, 2021 - Elsevier
The present study deals with fatigue crack propagation and fatigue limit properties of two
precipitation-hardened steels. One steel is more susceptible to strain localization than other …

Hydrogen-assisted failure in a bimodal twinning-induced plasticity steel: delamination events and damage evolution

A Mohammadi, M Koyama, G Gerstein, HJ Maier… - International Journal of …, 2018 - Elsevier
The effect of the bimodal grain size distribution on the hydrogen susceptibility of a high-Mn
fully austenitic twinning-induced plasticity (TWIP) steel was investigated by tensile testing …

Non-propagating fatigue cracks in austenitic steels with a micro-notch: Effects of dynamic strain aging, martensitic transformation, and microstructural hardness …

Y Nishikura, M Koyama, Y Yamamura, T Ogawa… - International Journal of …, 2018 - Elsevier
The non-propagation limit of a microstructurally small fatigue crack was investigated with
respect to dynamic strain aging (DSA), martensitic transformation, and microstructural …