Formation and microstructure of localized shear band in a low carbon steel

Xu, Yujie; Wang, X.; Wang, Z.G.; Luo, Lin; Bai, Yilong

doi:10.1016/0956-716x(90)90203-s

Cited by 15 publications

(5 citation statements)

References 8 publications

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“…This proposal was justified by the results of Hartley et al [158] However, they found that the shear bands in hot-rolled steel (about 150 lm wide) are narrower than that in cold-rolled steel (about 250 lm wide). Xu et al [44,[159][160][161] studied the tendency of the low-carbon steels with different structures to shear localization and found that the critical strain required for the occurrence of shear localization is strongly dependent on the strength at a given strain rate. This can be seen clearly from Figure 16, which shows that the critical strain values for the quenched, quenched and tempered, and normalized steels are 0.30, 0.36, and 0.83, respectively, implying that the steel with quenched martensite is most susceptible to shear localization.…”

Section: E Effect Of the Microstructures On Shear-band Formationmentioning

confidence: 99%

Shear Localization in Dynamic Deformation: Microstructural Evolution

Jing-hua

Bai

et al. 2008

Metall Mater Trans A

252

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Investigations made by the authors and collaborators into the microstructural aspects of adiabatic shear localization are critically reviewed. The materials analyzed are low-carbon steels, 304 stainless steel, monocrystalline Fe-Ni-Cr, Ti and its alloys, Al-Li alloys, Zircaloy, copper, and Al/SiC p composites. The principal findings are the following: (a) there is a strain-ratedependent critical strain for the development of shear bands; (b) deformed bands and whiteetching bands correspond to different stages of deformation; (c) different slip activities occur in different stages of band development; (d) grain refinement and amorphization occur in shear bands; (e) loss of stress-carrying capability is more closely associated with microdefects rather than with localization of strain; (f) both crystalline rotation and slip play important roles; and (g) band development and band structures are material dependent. Additionally, avenues for new research directions are suggested.

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Section: E Effect Of the Microstructures On Shear-band Formationmentioning

confidence: 99%

Shear Localization in Dynamic Deformation: Microstructural Evolution

Jing-hua

Bai

et al. 2008

Metall Mater Trans A

252

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“…Shear band initiation is postulated to start with a crystallographic slip in a grain and then propagates into the adjacent grain [25,26]. In this experiment, microshear banding was observed respectively for LS-L specimens and TS-T An Experimental Study of Shear Damage Using In-Situ Single Shear Test specimens.…”

Section: Microshear Bandingmentioning

confidence: 86%

“…The dislocation density in the shear band is very high in comparison with the regions outside the shear band [25]. In Figure 13(b), some microshear bands with length 3-4 mm were formed in the front of the particle.…”

Section: Shear Damage Evolution Particle Cracking Fracture and Rotationmentioning

confidence: 93%

An Experimental Study of Shear Damage Using In-Situ Single Shear Test

Tang¹,

Lee²,

Rao

et al. 2002

International Journal of Damage Mechanics

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An experimental study has been performed to investigate the shear damage mechanism of aluminium alloy 2024T3 by an in-situ single shear test using scanning electron microscope (SEM). The observation of microstructural change and measurement of shear strain in mesoscale have been undertaken simultaneously. Hence, the shear damage mechanism and the shear stress–strain curve have been obtained. By measuring the deformed grid of a laser-marked sample, the shear strain distribution has also been found. On the basis of the experimental results, the relation between the shear damage evolution and the corresponding shear stress–strain state have also been obtained. It has been observed that two groups of microshear bands were formed in the shear process. When the shear stress is close to the shear strength of the alloy, slipping within the microshear bands occurs. The causes of macro-shear band formation and the interrelation and interaction among different types of microdefects are also discussed.

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“…Cuando las bandas de corte se forman a velocidades de deformación muy altas, se encuentra que el calor generado dentro de las mismas no alcanza a disiparse hacia la masa del metal circundante, originándose un alto calentamiento; en estas condiciones, se hablará de banda de corte adiabática [4,7,8,9,11], encontrándose que éstas se forman fundamentalmente bajo cargas de tipo impacto. Se hallaron bandas de corte adiabáticas en todos los blancos, notándose que el ancho de las mismas disminuye con la dureza del material.…”

Section: Bandas De Corte Amabátlcasunclassified

“…Lo anterior se aprecia en la figura 8a, donde se pueden distinguir dentro de la banda de corte adiabática, ubicada en el cráter pasante formado por el impacto de un proyectil 7,62C sobre LXAR-400, los granos alargados de martensita revenida (grises) y de ferrita (claros). Si el porcentaje de deformación dentro de una banda de corte adiabática fue muy alto, se encuentra que en esta zona se sobrepasaron los valores de temperatura críticos, originándose en el enfriamiento una estructura de martensita muy fina, la cual no puede observarse al microscopio óptico [4,7,8,9,11]. En la figura 8b se observa una micrografía de una banda de corte adiabática, ubicada en el cráter no pasante formado por el impacto de un proyectil 5,56 SS109 sobre LXAR-400C2, donde se formó una martensita más fina que la martensita revenida de la matriz original del blanco que la rodea.…”

Section: Bandas De Corte Amabátlcasunclassified

Mecanismos de deformación y fractura presentes en la formación de cráteres durante el impacto de proyectiles sobre chapas de acero

2001

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En el presente trabajo se describen los mecanismos básicos de deformación y fractura mediante los cuales se formaron los cráteres que se presentaron al impactar con varios tipos de proyectiles, una serie de blancos de acero (chapas), los cuales recibieron diferentes ciclos de tratamiento térmico. Cada uno de los cráteres se caracterizó mediante ensayos de inspección visual y metalografía, evaluándose a partir de los resultados la morfología típica que presenta el maclaje, el deslizamiento, las bandas de corte adiabáticas, el desconchamiento y el agrietamiento, producidos por el impacto de los proyectiles.

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Formation and microstructure of localized shear band in a low carbon steel

Cited by 15 publications

References 8 publications

Shear Localization in Dynamic Deformation: Microstructural Evolution

Shear Localization in Dynamic Deformation: Microstructural Evolution

An Experimental Study of Shear Damage Using In-Situ Single Shear Test

Mecanismos de deformación y fractura presentes en la formación de cráteres durante el impacto de proyectiles sobre chapas de acero

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