Nanolaminate transformation-induced plasticity–twinning-induced plasticity steel with dynamic strain partitioning and enhanced damage resistance

Wang, Meimei; Taşan, Cemal Cem; Ponge, Dirk; Dippel, Ann Christin; Raabe, Dierk

doi:10.1016/j.actamat.2014.11.010

Cited by 228 publications

(112 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Both types of strain partitioning evolve during tensile testing due to the dependence of the g / a 0 -martensite transformation with applied tensile strains and the austenite stability of domain sizes as well. In this sense, the dynamic strain partitioning is expected, similar to that in TRIP-maraging steel [12].…”

Section: Dynamic Strain Partitioningmentioning

confidence: 62%

“…Each hardening mechanism may be active over a certain strain range, but several of them together could collectively produce a high strain-hardening rate to improve ductility, when at least one of them persists over a wide range of the imposed tensile strains [11,12]. One of the most effective approaches to increase both strain hardening and ductility is the transformation-induced plasticity, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…the TRIP effect, which is observed in dual-/multi-phase steels [11e13,16e18], TRIP steels [11,12,19e23], bainite steels [15,24], etc. In these steels, the phase-specific deformation mechanism takes effect at different stress or strain levels and therefore, the global plastic response is composite-like, which critically depends on the evolution of stress transfer and dynamic strain partitioning among different phases [11,12]. In addition, martensitic transformation is activated at varying local stress or strain levels during the tensile tests, which provides not only higher strain hardening but also excellent plasticity, when the TRIP effect is designed to sustain over a wide strain range [11,12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Combining gradient structure and TRIP effect to produce austenite stainless steel with high strength and ductility

et al. 2016

View full text Add to dashboard Cite

a b s t r a c tWe report a design strategy to combine the benefits from both gradient structure and transformationinduced plasticity (TRIP). The resultant TRIP-gradient steel takes advantage of both mechanisms, allowing strain hardening to last to a larger plastic strain. 304 stainless steel sheets were treated by surface mechanical attrition to synthesize gradient structure with a central coarse-grained layer sandwiched between two grain-size gradient layers. The gradient layer is composed of submicron-sized parallelepiped austenite domains separated by intersecting ε-martensite plates, with increasing domain size along the depth. Significant microhardness heterogeneity exists not only macroscopically between the soft coarse-grained core and the hard gradient layers, but also microscopically between the austenite domain and ε-martensite walls. During tensile testing, the gradient structure causes strain partitioning, which evolves with applied strain, and lasts to large strains. The g / a 0 martensitic transformation is triggered successively with an increase of the applied strain and flow stress. Importantly, the gradient structure prolongs the TRIP effect to large plastic strains. As a result, the gradient structure in the 304 stainless steel provides a new route towards a good combination of high strength and ductility, via the co-operation of both the dynamic strain partitioning and TRIP effect.

show abstract

Section: Dynamic Strain Partitioningmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Combining gradient structure and TRIP effect to produce austenite stainless steel with high strength and ductility

et al. 2016

View full text Add to dashboard Cite

show abstract

“…At these decorated interfaces martensite-to-austenite reversion was observed owing to the chemical decoration in conjunction with the local elastic distortion. This process occurred in a very confined manner, leading to transformation of at first only the interface regions, figure 6 [15][16][17]. With further heat treatment these originally confined and only nm-thin martensite-to-austenite transformation zones at the former lath interfaces could be grown further, expanding and thickening sideways into the adjacent martensite matrix [15][16][17][18][19].…”

Section: Figurementioning

confidence: 99%

1 billion tons of nanostructure – segregation engineering enables confined transformation effects at lattice defects in steels

Raabe

Ponge

Wang

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

Abstract. The microstructure of complex steels can be manipulated by utilising the interaction between the local mechanical distortions associated with lattice defects, such as dislocations and grain boundaries, and solute components that segregate to them. Phenomenologically these phenomena can be interpreted in terms of the classical Gibbs adsorption isotherm, which states that the total system energy can be reduced by removing solute atoms from the bulk and segregating them at lattice defects. Here we show how this principle can be utilised through appropriate heat treatments not only to enrich lattice defects by solute atoms, but also to further change these decorated regions into confined ordered structural states or even to trigger localized decomposition and phase transformations. This principle, which is based on the interplay between the structure and mechanics of lattice defects on the one hand and the chemistry of the alloy's solute components on the other hand, is referred to as segregation engineering. In this concept solute decoration to specific microstructural traps, viz. lattice defects, is not taken as an undesired effect, but instead seen as a tool for manipulating specific lattice defect structures, compositions and properties that lead to beneficial material behavior. Owing to the fairly well established underlying thermodynamic and kinetic principles, such local decoration and transformation effects can be tuned to proceed in a self-organised manner by adjusting (i) the heat treatment temperatures for matching the desired trapping, transformation or reversion regimes, and (ii) the corresponding timescales for sufficient solute diffusion to the targeted defects. Here we show how this segregation engineering principle can be applied to design selforganized nano-and microstructures in complex steels for improving their mechanical properties.

show abstract

“…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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Nanolaminate transformation-induced plasticity–twinning-induced plasticity steel with dynamic strain partitioning and enhanced damage resistance

Cited by 228 publications

References 73 publications

Combining gradient structure and TRIP effect to produce austenite stainless steel with high strength and ductility

Combining gradient structure and TRIP effect to produce austenite stainless steel with high strength and ductility

1 billion tons of nanostructure – segregation engineering enables confined transformation effects at lattice defects in steels

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

Contact Info

Product

Resources

About