The influence of stacking fault energy on the microstructural and strain-hardening evolution of Fe–Mn–Al–Si steels during tensile deformation

Pierce, D.T.; Jiménez, José Antonio; Bentley, J.; Raabe, Dierk; Wittig, J. E.

doi:10.1016/j.actamat.2015.08.030

Cited by 395 publications

(111 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The stacking-fault energy (SFE) is a composition and temperature-dependent characteristic of crystalline materials and plays an important role for the austenitic steel deformation [1,2]. The response to plastic deformation can in the case of austenitic stainless steels give rise to the microstructural changes: slip, twinning, or/and phase transformations.…”

Section: Introductionmentioning

confidence: 99%

Stacking fault energies in austenitic stainless steels

et al. 2016

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Stacking fault energies in austenitic stainless steels

et al. 2016

View full text Add to dashboard Cite

“…[3,4] These are being applied-with great effect-to hexagonal metals [3] which in spite of their closely related atomic packing show strongly anisotropic deformation and are therefore much more difficult to deform at low temperatures. In BCC metals, fundamental aspects of dislocation core structure, stress tensor dependence, and resulting non-Schmid behavior, are also still under investigation.…”

Section: Investigating Plasticity In Hard Crystalsmentioning

confidence: 99%

Microcompression of brittle and anisotropic crystals: recent advances and current challenges in studying plasticity in hard materials

Korte‐Kerzel

2017

MRS Communications

View full text Add to dashboard Cite

Recent years have seen an increased application of small-scale uniaxial testing-microcompression-to the study of plasticity in macroscopically brittle materials. By suppressing fast fracture, new insights into deformation mechanisms of more complex crystals have become available, which had previously been out of reach of experiments. Structurally complex intermetallics, metallic compounds, or oxides are commonly brittle, but in some cases extraordinary, though currently mostly unpredictable, mechanical properties are found. This paper aims to give a survey of current advances, outstanding challenges, and practical considerations in testing such hard, brittle, and anisotropic crystals.While the origin of mechanical strength, toughness, and creep resistance is well studied in most metals, much less is known about the properties of more complex crystal structuresdespite their wide use as reinforcement phases and the undiscovered potential in their sheer number and variability. A major challenge in plasticity research of the next years will therefore be to close this gap in knowledge. Small-scale testing techniques have been demonstrated as a key enabling technique for such studies. Most prominent is microcompression, which helps overcome the fundamental challenge of studying plasticity in materials, which suffer from extreme brittleness in conventional testing. [1,2] Their plastic properties may, at first glance, appear to be of only academic interest: aiming to deduce fundamental relationships of crystal plasticity and structure to enable knowledge-guided search and data mining for new structural materials. However, they are in fact essential to performance at the microstructural scale of many advanced and highly alloyed materials and to understanding the effects of alloying strategies aimed at inducing deformability as baseline or reference information. Investigating plasticity in hard crystalsA deep understanding of plasticity and dislocation motion exists in most metallic crystals and strategies to engineer different aspects, for example by adjustment of the stacking fault energy, have been very successful. [3,4] These are being applied-with great effect-to hexagonal metals [3] which in spite of their closely related atomic packing show strongly anisotropic deformation and are therefore much more difficult to deform at low temperatures. In BCC metals, fundamental aspects of dislocation core structure, stress tensor dependence, and resulting non-Schmid behavior, are also still under investigation. [5,6] However, in all of these materials, the availability of large-grained or single crystals with sufficient purity has scarcely been a problem, nor has the ability to deform such samples under carefully controlled conditions. Suitable investigations by conventional, analytical and high-resolution microscopy techniques have also been carried out whenever new methods have allowed researchers to dive deeper into the physics of their plastic deformation.In intermetallics, ceramics, and compounds we face challeng...

show abstract

“…Allain et al [23] noted that the addition of approximately 3 wt % Si to high-Mn TWIP steel has a remarkable effect on dislocation mobility by significantly reducing the activation volume and mean free path, affecting the yield strength and work-hardening rate. Pierce et al [24] indicated that manganese addition significantly affects the SFE. Strength and ductility decrease when the SFE is higher than 39 mJ/m 2 corresponding to a reduction in mechanical twinning.…”

Section: Introductionmentioning

confidence: 99%

Strain Hardening Behavior and Microstructure Evolution of High-Manganese Steel Subjected to Interrupted Tensile Tests

Grajcar

Kozłowska

Grzegorczyk

2018

Metals

View full text Add to dashboard Cite

Strain hardening behavior and the corresponding microstructure evolution of the high-manganese steel with additions of Si and Al were investigated in this study. Thermomechanically processed and solution-heat-treated sheet steels were compared under conditions of interrupted tensile tests. Relationships between microstructure and strain hardening were assessed for different strain levels using light microscopy and scanning electron microscopy techniques. It was found that the deformation of both steels at low strain levels was dominated by dislocation glide before the occurrence of mechanical twinning. The amount of twins, slip lines, and bands was increasing gradually up to the point of necking. As the strain level increased, dislocation density within twinning areas becomes higher, which enhances the strength, the work hardening exponent, and the work hardening rate of the investigated high-manganese sheet steels.

show abstract

The influence of stacking fault energy on the microstructural and strain-hardening evolution of Fe–Mn–Al–Si steels during tensile deformation

Cited by 395 publications

References 52 publications

Stacking fault energies in austenitic stainless steels

Stacking fault energies in austenitic stainless steels

Microcompression of brittle and anisotropic crystals: recent advances and current challenges in studying plasticity in hard materials

Strain Hardening Behavior and Microstructure Evolution of High-Manganese Steel Subjected to Interrupted Tensile Tests

Contact Info

Product

Resources

About