Deformation of single crystal Hadfield steel by twinning and slip

Караман, И.; Şehitoğlu, Hüseyin; Gall, Ken; Chumlyakov, Yuriy; Maier, Hans Jürgen

doi:10.1016/s1359-6454(99)00383-3

Cited by 378 publications

(192 citation statements)

References 25 publications

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“…Since twinning develops at the early stages in this material, the twinning reorientation scheme was activated at 4% strain consistent with experimental observations [3]. As a consequence, the constants A 1 and A 2 in equation (12) were set to 0.15 to reproduce this behavior in the " 111 orientation under tension.…”

Section: Single Crystalsmentioning

confidence: 63%

“…The initial critical resolved shear stresses for both slip and twinning is obtained from experimental results such that slip and twinning resistances are similar, with a slightly lower slip resistance. Consistent with our knowledge, twinning is observed at the early stages of deformation but slip is ®rst required to nucleate twinning [3]. The rate sensitivity was selected to be represented by n 20X…”

Section: Single Crystalsmentioning

confidence: 94%

“…Twinning has been observed as the main deformation mechanism [1] in these alloys. An extensive single crystal study by the authors [3] has elucidated the competing e ects of slip and twinning in this material and explained the observed tension±compression asymmetry and orientation dependence of strain-hardening behavior. In the orientations which deform by twinning and slip an upward curvature of the stress±strain response was evident.…”

Section: Introductionmentioning

confidence: 95%

“…In the light of recent experimental observations [3], a new hybrid hardening relation was introduced and incorporated in the viscoplastic self consistent (VPSC) model in the following section. This treatment predicts the stress±strain behavior of Had®eld steel single and polycrystals considering both the dislocation density and volume fraction of twins as microstructural variables.…”

Section: When the Crystal Is Twinned 11mentioning

confidence: 99%

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Modeling the deformation behavior of Hadfield steel single and polycrystals due to twinning and slip

et al. 2000

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AbstractÐStress±strain responses of single and polycrystals of Had®eld steel were modeled using a viscoplastic self-consistent approach. A unique hardening formulation was proposed in the constitutive model incorporating length scales associated with spacing between twin lamellae and grain boundaries. TEM observations lend further support to the length scales incorporated into the constitutive model. Many of the experimental ®ndings were made on " 111 and " 144 crystal orientations deformed in tension, displaying ®ne twin lamellae at small strains in addition to slip in intra-twin regions. A natural outcome of the model was the small deformation activity inside the twinned regions and higher deformations between the twins. The model utilized dislocation density as a state variable and predicted the stress±strain responses and texture evolution in single crystals accurately over a broad range of strains. The responses of polycrystals with three grain sizes (100, 300, and 1000 mm) were also captured closely with the model in addition to the twin volume fraction evolution with increasing deformation. Based on the simulations, it was possible to explain unequivocally the upward curvature in stress±strain curves in the single crystals and in coarse grained polycrystals of Had®eld steel. Overall, the combined experimental and modeling e orts provide a reliable tool to characterize slip±twin interaction in low stacking fault energy f

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Section: Single Crystalsmentioning

confidence: 63%

Section: Single Crystalsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 95%

Section: When the Crystal Is Twinned 11mentioning

confidence: 99%

See 2 more Smart Citations

Modeling the deformation behavior of Hadfield steel single and polycrystals due to twinning and slip

et al. 2000

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show abstract

“…Although the mean grain size of the specimens used in the present experiment was 3.814 μm, such effects could potentially occur because the sizes of individual grains were very different. Additionally, unexpected errors may exist because of interactions with surrounding grains (Barbier et al, 2009;Han et al, 2004;Karaman et al, 2000;Pérez-Prado & Doncel, 2006;Vercammen et al, 2004).…”

Section: Resultsmentioning

confidence: 99%