Intergranular strain accumulation in a near-alpha titanium alloy during plastic deformation

Cho, J.R.; Dye, David; Conlon, K. T.; Daymond, Mark R.; Reed, Roger C.

doi:10.1016/s1359-6454(02)00354-3

Cited by 55 publications

(27 citation statements)

References 14 publications

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“…Deformation mechanisms associated with plasticity in more complex systems than the current B2 intermetallics, such as hexagonal metals, have been elucidated via EPSC. [29][30][31] Details of the EPSC modeling approach have been described in previous publications; [32] therefore, only a short description with relevant details is presented here. The model treats polycrystalline materials as a collection of differently oriented grains.…”

Section: Epsc Modelingmentioning

confidence: 99%

Mechanisms of Ductility in CoTi and CoZr B2 Intermetallics

Wollmershauser

Neil

Agnew

2009

Metall Mater Trans A

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Section: Epsc Modelingmentioning

confidence: 99%

Mechanisms of Ductility in CoTi and CoZr B2 Intermetallics

Wollmershauser

Neil

Agnew

2009

Metall Mater Trans A

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“…The Zr-4 plates were purchased from Wah Chang and had a chemical composition (wt pct) of Zr 98.11 Sn 1.56 Fe 0. 22 Cr 0.11 . The oxygen content was 0.14 wt pct.…”

Section: A Weld Preparationmentioning

confidence: 99%

“…In addition, the introduction of a series of deformation modes with gradually increasing critical resolved shear stresses can mimic the effect of hardening in the Voce law. [22] A nonlinear least-squares fitting routine was implemented to fit the flow curve and the parallel and perpendicular intergranular strains for the parent plate as a function of plastic strain within the EPSC. Four fits were attempted with increasing numbers of deformation modes activated, namely, PR + PY, PR + PY + TTW, PR + PY + BA, and PR + PY + BA + TTW, allowing all the parameters of the Voce model to vary to obtain a best fit.…”

Section: Implementation Of Self-consistent Modelsmentioning

confidence: 99%

Investigation of Grain-Scale Stresses and Modeling of Tensile Deformation in a ZIRCALOY-4 Weldment

Carr

Holden

Ripley

et al. 2007

Metall Mater Trans A

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Tensile tests and neutron diffraction measurements of the residual elastic strain response to applied uniaxial stress have been made on samples taken from a ZIRCALOY-4 (Zr-4) weld in the as-welded condition. The samples were taken from the parent plate, and the weld metal and time-of-flight neutron diffraction measurements were made parallel and perpendicular to the applied stress direction, which corresponds to the weld direction and the transverse direction in the plane of the plate. Measurements were made on all crystallographic reflections permitted by the texture, and this allowed strains to be measured over the entire of the stereographic projection. The strains can be understood qualitatively in terms of what is already known for other zirconium alloys and with the aid of the elasto-plastic self-consistent model.

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“…This involves the addition of the measured strains in such a way that significant microstrains are not accumulated. [11] This previous work has shown that a synthetic strain synth represents a good estimate of the bulk response; it is formed using a weighted average according to [5] synth ϭ a w i i 1 2 where w i is the weight and i is the measured strain on the ith reflection. The weights are constructed such that the accumulation of microstrains is minimized, with the total weight equal to unity.…”

Section: A Measurements Of Lattice Strainsmentioning

confidence: 99%

Residual stresses in an electron beam weld of Ti-834: Characterization and numerical modeling

Cho

Conlon²,

Reed

2003

Metall Mater Trans A

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Neutron and synchrotron X-ray strain scanning techniques are used to characterize the residual stresses in an electron beam weld in the near-alpha titanium alloy Ti-834. Measurements are made using the {10 3} and {11 0} lattice planes in both the longitudinal and transverse directions, i.e., both along and normal to the welding direction. The lattice strains are large and positive (several thousand microstrains) in the longitudinal direction; in the fusion zone, the strains measured on the two planes differ by about 30 pct. The strains in the transverse direction are significantly smaller. A numerical model based upon the finite-element method (FEM) is developed in order to rationalize these results. Account is taken of the transfer of heat to the metal and subsequent conduction into the heat-affected zone; convection and radiation effects are neglected. The residual stresses are then estimated using an elastic-plastic analysis with temperature-dependent properties. Despite the limitations of the modeling approach, there is good agreement between experiment and theory, i.e., the sign and extent of the stress field. The plastically upset region extends about 3.5 mm from the weld centerline. The model is used to examine the adequacies of the experimental approach. It is demonstrated that the difference between the lattice strains measured for the two reflections in the fusion zone occurs as a consequence of the micromechanical response of the material, e.g., the partitioning of stress between the grains and the accumulation of intergranular microstrains. 2 1

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Intergranular strain accumulation in a near-alpha titanium alloy during plastic deformation

Cited by 55 publications

References 14 publications

Mechanisms of Ductility in CoTi and CoZr B2 Intermetallics

Mechanisms of Ductility in CoTi and CoZr B2 Intermetallics

Investigation of Grain-Scale Stresses and Modeling of Tensile Deformation in a ZIRCALOY-4 Weldment

Residual stresses in an electron beam weld of Ti-834: Characterization and numerical modeling

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