Precipitation hardening characterization and stress prediction model in electrically-assisted Ti2AlNb uniaxial tension

Cao, Xudong; An, Dayong; Liu, Qing; Chen, Guoqing; Li, Xifeng

doi:10.1016/j.intermet.2024.108214

Cited by 4 publications

(2 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Electroplasticity was studied for different loading schemes, e.g., during bending [50], compression [51], tension [52][53][54][55], and nanoindentation [56]. If the deformation increment decreases with the pulse number at constant stress then this is in favor of the fact that electroplasticity is not only due to the Joule heating but also due to the dislocation de-pinning.…”

Section: Introductionmentioning

confidence: 99%

Effect of Repetitive High-Density Current Pulses on Plastic Deformation of Copper Wires under Stepwise Loading

Dmitriev,

Morkina,

Tarov

et al. 2024

Spec. Mech. Eng. Oper. Res.

View full text Add to dashboard Cite

High-density electric current pulses increase the plasticity and reduce the yield stress of metals with negligible heat generation. This effect has great potential for the development of energy-saving technologies for processing hard-to-deform metallic materials. Despite the long history of the study of electroplasticity, there is still no consensus on the physical nature of this effect. In this paper, the effect of repetitive pulses applied at the same or gradually increasing tensile stress on the plastic deformation of copper wire is investigated using a home-made experimental setup. The electroplasticity of the wire in the delivery state and after annealing is compared. It is shown that for a constant tensile stress, the incremental plastic deformation of the wire decreases with each successive pulse. This effect is stronger for annealed wires because they have a lower dislocation density and therefore a lower plasticity resource. The Joule heat release in the specimen and the heating due to plastic deformation are evaluated. The results obtained will be used to fit the parameters of the atomistic model being developed to describe the interaction of electron flow with dislocations.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Repetitive High-Density Current Pulses on Plastic Deformation of Copper Wires under Stepwise Loading

Dmitriev,

Morkina,

Tarov

et al. 2024

Spec. Mech. Eng. Oper. Res.

View full text Add to dashboard Cite

show abstract

“…Compared to TiAl-based alloys, Ti 2 AlNb alloys possess better room-temperature plasticity, fracture toughness, as well as crack extension resistance, and possess better high-temperature strength and oxidation resistance [ 5 , 6 ]. In addition, the density of Ti 2 AlNb-based alloys is reduced by about 40% compared to iron-based and nickel-based high-temperature alloys without affecting the material high-temperature properties [ 7 ]. Ti 2 AlNb is potential aviation material with broad application prospects to replace nickel-based high-temperature alloys due to its superior properties.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Mechanical Properties and Modified Material Constitutive Model for Hot Forged Ti2AlNb over Wide Ranges of Temperature and Strain Rate

Li,

Pan,

Zhang

et al. 2024

Materials

View full text Add to dashboard Cite

In this paper, the stress–strain curves of Ti2AlNb are established based on uniaxial impact tests over wide ranges of temperature and strain rate. The Ti2AlNb exhibited the work hardening effect but did not show an obvious yield stage during a quasi-static compression test. In the SHPB test, an obvious temperature softening effect was found, the strain rate strengthening effect was detected when the strain rate was 4000–8000 s−1, and the strain rate softening effect was detected in the range of 8000–12,000 s−1. A function describing the effect of strain rate on the strain rate strengthening parameters under various temperatures was proposed to modify the basic J-C constitutive model. The relative errors between the experimental measured value and predicted values in various experimental conditions with a modified J-C model were less than 5.0%. The results verified that the modified J-C model could accurately describe the dynamic mechanical properties of Ti2AlNb at high temperatures and strain rates. The research could help to illustrate the cutting mechanism and finite element simulation of Ti2AlNb alloy.

show abstract

Effect of electric current on microstructure and texture evolution of the Ti2AlNb alloy during hot deformation

Li,

Zhang,

Jiao

et al. 2024

Journal of Materials Research and Technology

View full text Add to dashboard Cite

Precipitation hardening characterization and stress prediction model in electrically-assisted Ti2AlNb uniaxial tension

Cited by 4 publications

References 31 publications

Effect of Repetitive High-Density Current Pulses on Plastic Deformation of Copper Wires under Stepwise Loading

Effect of Repetitive High-Density Current Pulses on Plastic Deformation of Copper Wires under Stepwise Loading

Dynamic Mechanical Properties and Modified Material Constitutive Model for Hot Forged Ti2AlNb over Wide Ranges of Temperature and Strain Rate

Effect of electric current on microstructure and texture evolution of the Ti2AlNb alloy during hot deformation

Contact Info

Product

Resources

About