On the thermodynamic requirement of elastic stiffness anisotropy in isotropic materials

Fuller, Timothy Jesse; Brannon, Rebecca M.

doi:10.1016/j.ijengsci.2010.12.017

Cited by 13 publications

(6 citation statements)

References 37 publications

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“…An initially isotropic material responds by developing anisotropy when subjected to inelastic deformation. The inelastic induced anisotropy includes directional anisotropy in cold worked metals [2]. Unstable defect structures are retained after deformation [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of Soaking Time on the Mechanical Properties of Annealed Cold-Drawn Low Carbon Steel

Raji¹,

Oluwole²

2012

MSA

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The paper presents the results of investigation on the effect of soaking time on the yield strength, ductility and hardness properties of annealed cold-drawn low carbon steel. The low carbon steel cold-drawn at 40% deformation was annealed at 900 deg Celsius for soaking times of 10, 20, 30, 40, 50 and 60 minutes. Tensile, charpy and Brinnel hardness tests were conducted to determine the yield strengths, tensile strengths, impact strengths, ductility and hardness of the annealed steel with increasing soaking time. The yield strength, tensile strength, hardness and impact strength of the steel showed a continuous drop in value with increasing soaking time up to 60 minutes with a steep drop between 30 and 40 minutes. Ductility values followed the same decreasing trend up to 40 minutes soaking time after which the values started increasing again till 60 minutes soaking time. There was a linear relationship between the tensile strength and hardness of the material for different soaking times. This linear relationship was also observed for yield strength and hardness of the material

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Section: Introductionmentioning

confidence: 99%

Effect of Soaking Time on the Mechanical Properties of Annealed Cold-Drawn Low Carbon Steel

Raji¹,

Oluwole²

2012

MSA

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“…Various formulations with nonlinear and pressure dependent bulk modulus are available (e.g. Butterfield 1979, Houlsby et al 2005, Fuller & Brannon 2011, but most often the nonlinear bulk modulus defined in (1) is coupled with a constant shear modulus G (e.g. , Romero & Jommi 2008 or a constant Poisson ratio (e.g.…”

Section: Discussionmentioning

confidence: 99%

Unsaturated Soils: Research and Applications

2012

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“…An initially isotropic material responds by developing anisotropy when subjected to inelastic deformation. The inelastic induced anisotropy includes directional anisotropy in cold worked metals [22]. These changes in the mechanical properties of the steel due to the deformation often influence the performance of the resulting product of the process in service.…”

Section: Introductionmentioning

confidence: 99%

Recrystallization Kinetics and Microstructure Evolution of Annealed Cold-Drawn Low-Carbon Steel

Raji¹,

Oluwole²

2013

JCPT

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The recrystallization behavior of cold-drawn 0.12 wt% C steel during annealing at temperatures 600˚C and 650˚C was investigated. Hardness tests were used to characterize the recrystallization kinetics. The micrographs of the steel were obtained using optical microscopy (OM) to characterize the grain microstructure of the non-treated and the annealed steel samples. Annihilation of dislocation defects occur within the soaking time of 5-10 minutes for all the deformed steel after annealing at 650˚C. Specifically at 5 minutes soaking time the grains elongation is still observed indicating that reformation of grains is not taking place but recovery of the deformed grains. At the 10 minutes annealing time, new grains are observed to begin and full recrystallization is achieved at 15 minutes annealing time. At annealing time between 20-25 minutes, grains coarsening are observed indicating the onset of grain growth. The hardness of the material reduces with increasing annealing temperature for all the degree of cold drawn deformation. On the basis of the experimentally obtained hardness values, recrystallization increases with increasing degree of cold drawn deformation for the annealed steel. Recovery process was found to prolong in the 20% cold drawn steel as compared to the 55% cold drawn steel. The prolong recovery process is due to reduction in the driving force. Full recrystallization of the annealed steel is achieved at different soaking time depending on the degree of the cold drawn steel.

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On the thermodynamic requirement of elastic stiffness anisotropy in isotropic materials

Cited by 13 publications

References 37 publications

Effect of Soaking Time on the Mechanical Properties of Annealed Cold-Drawn Low Carbon Steel

Effect of Soaking Time on the Mechanical Properties of Annealed Cold-Drawn Low Carbon Steel

Unsaturated Soils: Research and Applications

Recrystallization Kinetics and Microstructure Evolution of Annealed Cold-Drawn Low-Carbon Steel

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