Behaviors of three BCC metal over a wide range of strain rates and temperatures: experiments and modeling

Khan, Akhtar S.; Liang, Riqiang

doi:10.1016/s0749-6419(99)00030-3

Cited by 332 publications

(103 citation statements)

References 17 publications

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“…Since the Fe-2Ni sintered alloy contains microscopic pores, the flow response of this sintered alloy should be modeled by integrating the modified Khan-Huang-Liang (KHL) equation 13,14) with Gurson's porous constitutive relation.…”

Section: Deformation Constitutive Equationmentioning

confidence: 99%

The Effect of Strain Rate on the Impact Behaviour of Fe–2 mass% Ni Sintered Alloy

Lee

Chou

2005

Mater. Trans.

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The impact behaviour of Fe-2 mass% Ni sintered alloy as a function of strain rate has been studied using a material testing system at strain rate of 10 À3 , 10 À2 and 10 À1 s À1 and a split Hopkinson bar at strain rates ranging from 2:5 Â 10 3 s À1 to 6:8 Â 10 3 s À1 . The mechanical properties of the sintered alloy, including its impact strength, rate of work hardening and strain rate sensitivity are found to be significantly influenced by the strain rate at which deformation takes place. A constitutive law based on the Khan-Huang-Liang model is applied to predict the ratedependent plastic flow behaviour of the sintered alloy. The model predictions are found to be in good agreement with the observed experimental response. Even under heavy deformation conditions, none of the specimens were observed to fracture. Microstructural observations reveal that the grain size of the deformed specimen decreases as the strain rate increases. The reduction of the grain size can lead to an increase of the flow stress due to the enhancement of the grain boundary area.

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Section: Deformation Constitutive Equationmentioning

confidence: 99%

The Effect of Strain Rate on the Impact Behaviour of Fe–2 mass% Ni Sintered Alloy

Lee

Chou

2005

Mater. Trans.

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“…Tantalum was selected for the following reasons: 1) its high melting temperature (3290 K) allows us to study the bcc peculiarities at room temperature (bcc metals typically show a transition between bcc-type and fcc-type behavior at 0.15 T melting [13]); 2) Ta has a very thin and stable native oxide layer (~ 1 nm) [23]; 3) the mechanical behavior of Ta at the macroscale has been well studied [24][25][26][27][28][29]; and 4) tantalum is a very interesting engineering material due to its high density, high fracture toughness and ductility, and corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Dislocation nucleation in bcc Ta single crystals studied by nanoindentation

et al. 2007

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“…KHL model (Khan and Liang [23]; Khan et al [24]; Khan et al [25]) was used to model the experimental response of these materials. The KHL model is as follows:…”

Section: Constitutive Model and Theoretical Analysismentioning

confidence: 99%

“…_ e represents the experimental strain-rate and _ e Ã is the normalizing strain-rate parameter, usually taken as 1/s. The step by step procedure to obtain the material constants for the KHL model can be found in Khan and Liang [23].…”

Section: Constitutive Model and Theoretical Analysismentioning

confidence: 99%

Effect of Manufacturing Processes and Welding Type on Quasi-static and Dynamic Responses of Aluminum Alloys: Experiments and Modeling

Baig

Khan

Choi

et al. 2015

J. dynamic behavior mater.

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Measured responses of two aluminum alloys over a wide range of strain-rates (10 -5 to 10 3 s -1 ) and temperatures are presented. The aluminum alloys include AA5182-O and AL6111-T4. A tensile spilt Hopkinson pressure bar was used for the dynamic experiments. The aluminum AA5182-O alloy (manufactured using continuous casting and direct chilling processes) including its first and second generation gas tungsten arc welded and friction stir welded TWB's exhibited negative strain-rate sensitivity. AL6111-T4 is found to have positive strain-rate sensitivity. The Khan-Huang-Liang constitutive model is shown to correlate and predict the observed responses reasonably well. The texture evolution of the AA5182-O and AL6111-T4 sheets during uniaxial tension is investigated using the EBSD technique and full-constraint polycrystal model. It is observed through the EBSD analysis that, the stable orientation is strongly dependent on the initial texture components.Keywords AA5182-O Á AL6111-T4 Á Quasi-static and dynamic response Á Tensile split Hopkinson bar Á EBSD

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Behaviors of three BCC metal over a wide range of strain rates and temperatures: experiments and modeling

Cited by 332 publications

References 17 publications

The Effect of Strain Rate on the Impact Behaviour of Fe–2 mass% Ni Sintered Alloy

The Effect of Strain Rate on the Impact Behaviour of Fe–2 mass% Ni Sintered Alloy

Dislocation nucleation in bcc Ta single crystals studied by nanoindentation

Effect of Manufacturing Processes and Welding Type on Quasi-static and Dynamic Responses of Aluminum Alloys: Experiments and Modeling

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Behaviors of three BCC metal over a wide range of strain rates and temperatures: experiments and modeling

Cited by 332 publications

References 17 publications

The Effect of Strain Rate on the Impact Behaviour of Fe&ndash;2 mass% Ni Sintered Alloy

The Effect of Strain Rate on the Impact Behaviour of Fe&ndash;2 mass% Ni Sintered Alloy

Dislocation nucleation in bcc Ta single crystals studied by nanoindentation

Effect of Manufacturing Processes and Welding Type on Quasi-static and Dynamic Responses of Aluminum Alloys: Experiments and Modeling

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The Effect of Strain Rate on the Impact Behaviour of Fe–2 mass% Ni Sintered Alloy

The Effect of Strain Rate on the Impact Behaviour of Fe–2 mass% Ni Sintered Alloy