Material characterization, constitutive modelling, and processing map for superplastic deformation region in Ti-6Al-4V alloy

Wahed, Mohd Abdul; Gupta, Amit Kumar; Sharma, Vaibhav; Mahesh, K.K.; Singh, S. K.; Kotkunde, Nitin

doi:10.1007/s00170-019-03956-z

Cited by 19 publications

(7 citation statements)

References 39 publications

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“…This is because the DRV accelerates the elimination and annihilation of dislocations, reducing the substructures. [ 62 ] As shown in Figure 11a,c, the thickness of grains significantly reduces with raising strain rate at 150 °C, and the long grains are broken into short grains. From Figure 11c,d, more fine grains, which are composed of the crushed and DRX grains, appear at grain boundaries and within grains at 250 °C.…”

Section: Experimental Results and Analysismentioning

confidence: 99%

Dynamic Softening Mechanism and an Improved Unified Constitutive Model for an Al–Cu–Mn–Fe–Zr Alloy during Warm Deformation

et al. 2021

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Deformation behavior of an Al–Cu–Mn–Fe–Zr alloy is investigated by plane strain compression tests at a warm deformation region. The flow stress first increases and then keeps steady, and the flow stress increases with reducing temperature or raising strain rate. However, the influence of strain rate on flow stress is weak at 100 and 150 °C. The dynamic recovery (DRV) mechanism is the dominant mechanism to balance the work hardening, and a larger number of dislocations are consumed at low strain rates. So, the deformed grains are difficult to reach the critical strain for dynamic recrystallization (DRX). When the strain rate is relatively high, the critical strain can be reached in a short time, which promotes the process of DRX. In addition, an improved unified constitutive model is built based on the evolution of dislocation density. The predicted flow stresses are in a close agreement with the measured results, proving that the built model can nicely reproduce the flow behavior.

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Section: Experimental Results and Analysismentioning

confidence: 99%

Dynamic Softening Mechanism and an Improved Unified Constitutive Model for an Al–Cu–Mn–Fe–Zr Alloy during Warm Deformation

et al. 2021

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“…GBS was considered as a possible cause for such a behaviour at 700 °C. This mechanism is usually considered irrelevant below 700 °C [48,54,55], but superplasticity could indeed even occur at 600 °C, provided that the alloy has a sub-micron grain size [56]. This was not obviously the case for the alloys here analysed.…”

Section: Effect Of Microstructure On Creep Response Of Ti-6al-4v: Rec...mentioning

confidence: 88%

On the creep performance of the Ti‐6Al‐4V alloy processed by additive manufacturing

Spigarelli

Paoletti

Cabibbo

et al. 2022

Additive Manufacturing

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“…A large number of researches shows that when the metal is subjected to impact load, the three strain rate stages of low, medium and high will appear. After the material enters the plastic state, its mechanical behavior is obviously affected by strain hardening, strain rate effect and temperature [6][7][8]. Johnson and Cook [9] proposed the Johnson Cook (JC) constitutive model in the form of the product of strain hardening term, strain rate effect term and temperature term by analyzing the experimental data.…”

Section: Introductionmentioning

confidence: 99%

Modification of the Johnson–Cook model for metal at a wide range of strain rates and application in the dynamic response of honeycomb panels

Li¹,

Su²,

Wang³

et al. 2022

Modelling Simul. Mater. Sci. Eng.

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In this paper, the H/V-JC/CS dynamic constitutive relation suitable for a wide range of strain rates is proposed. Based on the experimental data in the existing literatures, the parameters of the H/V-JC/CS constitutive model for metal materials are calibrated by using the global optimization algorithm, which has high accuracy, convenient application, and is unlimited in number of parameters. The obtained parameters do not depend on the initial value and are the global optimal combination. The corresponding ABAQUS visual user material (VUMAT) subroutine is compiled and imported into the finite element analysis for the dynamic response of the honeycomb panel structure. The influence of geometric parameters on the energy absorption effect of honeycomb panels under impact load is explored. The research shows that the proposed H/V-JC/CS constitutive model can well describe the mechanical behavior of various metals in a wide range of strain rates under impact load, and can be used in ABAQUS dynamic explicit environment. It provides a high-precision engineering application analysis model for metal structures under dynamic load.

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Material characterization, constitutive modelling, and processing map for superplastic deformation region in Ti-6Al-4V alloy

Cited by 19 publications

References 39 publications

Dynamic Softening Mechanism and an Improved Unified Constitutive Model for an Al–Cu–Mn–Fe–Zr Alloy during Warm Deformation

Dynamic Softening Mechanism and an Improved Unified Constitutive Model for an Al–Cu–Mn–Fe–Zr Alloy during Warm Deformation

On the creep performance of the Ti‐6Al‐4V alloy processed by additive manufacturing

Modification of the Johnson–Cook model for metal at a wide range of strain rates and application in the dynamic response of honeycomb panels

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