Reversible deformation in nanocrystalline TWIP steel during cyclic loading by partial slip reversal and detwinning

Mohammadzadeh, Roghayeh

doi:10.1016/j.msea.2020.139251

Cited by 14 publications

(6 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 8(h) shows that detwinning begins for a compression of about -417 MPa, close in absolute value to the stress needed for twinning, which lies between 400 and 475 MPa. This observation conflicts with the outcome of molecular dynamics simulations made for nano polycristalline TWIP steel by Mohammadzadeh [7] according to which detwinning begins right at the onset of stress reversal. The present observations are however in agreement with the phase-field energetic approach developed by Hu et al [8] in which the resolved shear stress to trigger detwinning was the opposite of that for twinning.…”

Section: Threshold and Degree Of Twinning/detwinning/retwinningcontrasting

confidence: 72%

“…The combination of equations ( 5) to (7) leads to a quadratic equation to calculate the local twin fraction.…”

Section: Quantitative Monitoring Of Twinning Based On Hr-dicmentioning

confidence: 99%

“…The dislocation-twin interactions potentially responsible for each of those two phenomena have been analyzed in detail [6]. Molecular dynamics simulations of tensioncompression loading on nanocrystalline alloys predicted a twinning/detwinning sequence [7]. Hu et al [8] developed a phase field model, for mesoscale simulations of stress-induced twinningdetwinning in a FCC polycrystal.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Direct monitoring of twinning/detwinning in a TWIP steel under reversed cyclic loading

D'Hondt

Doquet

Couzinié

2021

Materials Science and Engineering: A

View full text Add to dashboard Cite

In situ tensile and reversed cyclic tests were run on a TWIP steel in a SEM, with High-Resolution Digital Image Correlation (HR-DIC) measurements of the plastic strain field in a few selected grains prone to twinning, with a spatial resolution between 150 and 250nm, or under an AFM, with measurements of surface steps height at emerging deformation twins. Evidences of detwinning upon load reversal, as well as quantitative data on twinning/detwinning/retwinning were obtained. Detwinning and retwinning, which often were only partial, in spite of a fully reversed loading, did not seem to start at the onset of stress reversal. It required a sufficient variation of the stress, close to the twinning stress (estimated as 400 to 475 MPa) in absolute value, so that a mechanical hysteresis of the local twinned fraction occurred. Primary and secondary twinning along the same plane, inducing axial plastic strains in opposite directions, also allowed some grains to accommodate reversed plastic strain. Under fixed stress amplitude (± 500 MPa), the twin fraction in all monitored grains saturated at values between 0.5 and 3.5%, from the 2 nd cycle, while under fixed plastic strain amplitude (± 0.5%), it increased in a ratchetting way during the whole cyclic hardening stage, reaching 0.5 to 5%. In both cases, however, the plastic strain amplitude accommodated by twinning/detwinning, which reached 0.35 -0.42% in some grains during the 1 st cycle, decreased down to less than 0.05% after 100 to 1000 cycles.

show abstract

Section: Threshold and Degree Of Twinning/detwinning/retwinningcontrasting

confidence: 72%

“…The combination of equations ( 5) to (7) leads to a quadratic equation to calculate the local twin fraction.…”

Section: Quantitative Monitoring Of Twinning Based On Hr-dicmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Direct monitoring of twinning/detwinning in a TWIP steel under reversed cyclic loading

D'Hondt

Doquet

Couzinié

2021

Materials Science and Engineering: A

View full text Add to dashboard Cite

show abstract

“…He believes that the current technology is sufficient to analyze the atomic level, so it is necessary to conduct microscopic steel fracture surface analysis. This is confirmed by the experimental results of TWIP microcrystals with a stress dependence [3]. Hu et al's research is more microscopic.…”

Section: Related Worksupporting

confidence: 55%

Heterogeneous Deformation and Microstructure of TWIP Steel under Damage and Fracture

Dong

Zhang

Hou

2022

Journal of Nanomaterials

View full text Add to dashboard Cite

Materials have always been a research hotspot in the chemical industry. With the continuous development of technology, the iteration of materials research has become faster and faster. Steel has strong toughness and tensile strength, and it is widely used in construction and other fields. However, one problem that cannot be avoided is the fracture of steel. The purpose of this paper is to analyze the damage and fracture of TWIP steel. In this paper, a microstructure characterization calculation method based on TWIP is proposed, which can effectively analyze the fracture surface, and for the performance of TWIP steel, this paper uses two different TWIP steels for comparative analysis. The results of this paper show that the HDI hardening rate of 22Mn0.6C TWIP steel is higher than that of 22Mn0.6C3Al TWIP steel.

show abstract

“…These interface engineering results showed that GB-mediated deformation helps in attaining reversible plasticity. Recently, Mohammadzadeh [8] reported reversible deformation in Fe-22Mn (wt.%) nanocrystalline TWIP steels by partial slip reversal and detwinning. Most recently, Zhu et al [9] proposed the GBE method with controlled misorientation of low angle grain boundaries in FCC metallic bicrystals.…”

Section: Introductionmentioning

confidence: 99%

Twin boundary reversibility characteristics in α-Fe

Veerababu

Sainath

Nagesha

2021

Materials Today Communications

View full text Add to dashboard Cite

Reversible deformation in nanocrystalline TWIP steel during cyclic loading by partial slip reversal and detwinning

Cited by 14 publications

References 28 publications

Direct monitoring of twinning/detwinning in a TWIP steel under reversed cyclic loading

Direct monitoring of twinning/detwinning in a TWIP steel under reversed cyclic loading

Heterogeneous Deformation and Microstructure of TWIP Steel under Damage and Fracture

Twin boundary reversibility characteristics in α-Fe

Contact Info

Product

Resources

About