Grain boundary segregation engineering and austenite reversion turn embrittlement into toughness: Example of a 9 wt.% medium Mn steel

Kuzmina, Margarita; Ponge, Dirk; Raabe, Dierk

doi:10.1016/j.actamat.2014.12.021

Cited by 250 publications

(96 citation statements)

References 61 publications

(89 reference statements)

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“…No apparent elemental segregation of the alloying elements (Fe, Mn, Co, Cr) was found in the 3D maps, indicating a random solid solution state in the investigated volume. This is different compared to related FeMn and FeMnNi based alloys which reveal in part substantial Mn segregation at the grain boundaries [35][36][37]. Furthermore, a binomial frequency distribution analysis was employed to evaluate statistically the random elemental distribution.…”

Section: Microstructure Development During Processingmentioning

confidence: 99%

Design of a twinning-induced plasticity high entropy alloy

et al. 2015

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Section: Microstructure Development During Processingmentioning

confidence: 99%

Design of a twinning-induced plasticity high entropy alloy

et al. 2015

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“…Watanabe et al [25] have reviewed the recent achievements in GBE by magnetic field application for powerful control of abnormal grain growth and intergranular brittleness due to segregation of detrimental elements in nanocrystalline and ordinary polycrystalline materials [24–25]. More recently, Raabe et al [27–28] proposed grain boundary segregation engineering for improvement of material properties, such as the stabilization of grains in nanocrystalline steel by carbon and solute element segregation. Kalidindi et al [29] have suggested that the stability of the nanocrystalline structure is improved by preferential segregation of solute atoms to grain boundaries because their excess free energy can be reduced.…”

Section: Introductionmentioning

confidence: 99%

A new approach to grain boundary engineering for nanocrystalline materials

Kobayashi

Tsurekawa

Watanabe

2016

Beilstein J. Nanotechnol.

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A new approach to grain boundary engineering (GBE) for high performance nanocrystalline materials, especially those produced by electrodeposition and sputtering, is discussed on the basis of some important findings from recently available results on GBE for nanocrystalline materials. In order to optimize their utility, the beneficial effects of grain boundary microstructures have been seriously considered according to the almost established approach to GBE. This approach has been increasingly recognized for the development of high performance nanocrystalline materials with an extremely high density of grain boundaries and triple junctions. The effectiveness of precisely controlled grain boundary microstructures (quantitatively characterized by the grain boundary character distribution (GBCD) and grain boundary connectivity associated with triple junctions) has been revealed for recent achievements in the enhancement of grain boundary strengthening, hardness, and the control of segregation-induced intergranular brittleness and intergranular fatigue fracture in electrodeposited nickel and nickel alloys with initial submicrometer-grained structure. A new approach to GBE based on fractal analysis of grain boundary connectivity is proposed to produce high performance nanocrystalline or submicrometer-grained materials with desirable mechanical properties such as enhanced fracture resistance. Finally, the potential power of GBE is demonstrated for high performance functional materials like gold thin films through precise control of electrical resistance based on the fractal analysis of the grain boundary microstructure.

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“…Here, we provide some examples how these different types of segregation phenomena and confined structural states at lattice defects can be used to design complex microstructures in metallic alloys by using simple heat treatments [12][13][14]. We give examples of corresponding segregation effects, complexions and phase transformation phenomena in Fe-Mn steels taken from earlier work [12][13][14][15][16][17][18][19]. Also, we present some related phenomena in the system Ti-Mo.…”

Section: Segregation Engineering and Complexionsmentioning

confidence: 99%

Atom probe tomography reveals options for microstructural design of steels and titanium alloys by segregation engineering

Raabe

Herbig

Kuzmina

et al. 2015

MATEC Web of Conferences

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Abstract. Here we discuss approaches for designing microstructures in steels and titanium alloys by manipulating the segregation content and the structural state of lattice defects. Different mechanisms can be utilized in that context, such as for instance site specific segregation as described by the Gibbs isotherm and the generalized defectant concept, confined phase transformation phenomena and the formation of complexions, i.e. confined chemical and structural states at lattice defects.

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Grain boundary segregation engineering and austenite reversion turn embrittlement into toughness: Example of a 9 wt.% medium Mn steel

Cited by 250 publications

References 61 publications

Design of a twinning-induced plasticity high entropy alloy

Design of a twinning-induced plasticity high entropy alloy

A new approach to grain boundary engineering for nanocrystalline materials

Atom probe tomography reveals options for microstructural design of steels and titanium alloys by segregation engineering

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