Study of the dynamic recrystallization of Ti–6.5Al–3.5Mo–1.5Zr–0.3Si alloy in β-forging process via Finite Element Method modeling and microstructure characterization

Wang, K.L.; Fu, Ming; Lu, Shi Qiang; Li, X.

doi:10.1016/j.matdes.2010.09.033

Cited by 65 publications

(15 citation statements)

References 32 publications

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“…Taking the appearance of equiaxed a grains for example, many hypotheses could account for it, e.g. laths shearing and interfaces migration by diffusion [17], DDRX [18], CDRX [19], rotational dynamic recrystallization (RDRX) [20] and geometric dynamic recrystallization (GDRX) [21,22].…”

Section: Introductionmentioning

confidence: 99%

An experimental study of deformation mechanism and microstructure evolution during hot deformation of Ti–6Al–2Zr–1Mo–1V alloy

Zhu

Lai

et al. 2013

Materials & Design (1980-2015)

102

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a b s t r a c tIsothermal tensile tests have been performed to study the deformation mechanisms and microstructure evolution of Ti-6Al-2Zr-1Mo-1V titanium alloy in the temperature range 750-850°C and strain rate range 0.001-0.1 s À1. The deformation activations have been calculated based on kinetics rate equation to investigate the hot deformation mechanism. Microstructures of deformed samples have been analyzed by electron backscatter diffraction (EBSD) to evaluate the influences of hot deformation parameters on the microstructure evolution and recrystallization mechanism. The results indicate that deformation mechanisms vary with deformation conditions: at medium (800°C) and high (850°C) temperature, the deformation is mainly controlled by the mechanisms of dislocation creep and self-diffusion, respectively. The microstructure globularization mechanisms also depend on deformation temperature: in the temperature range from 750 to 800°C, the high angle grain boundaries are mainly formed via dislocation accumulation or subgrain boundaries sliding and subgrains rotation; while at high temperature of 850°C, recrystallization is the dominant mechanism. Especially, the evolution of the recrystallization mechanism with the deformation temperature is first observed and investigated in TA15 titanium alloy.

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Section: Introductionmentioning

confidence: 99%

An experimental study of deformation mechanism and microstructure evolution during hot deformation of Ti–6Al–2Zr–1Mo–1V alloy

Zhu

Lai

et al. 2013

Materials & Design (1980-2015)

102

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“…Yue et al [14] developed four 3D finite element models to simulate the whole rod rolling process of GCr15 steel, and a FORTRAN program was developed to predict the evolution of recrystallization behavior and austenite grain size in rolled piece. Wang et al [15] investigated the DRX behavior of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy in b-forging process, and the effects of plastic deformation strain, strain rate and deformation temperature on the DRX behavior of Ti-alloy were systematically investigated. He et al [16] investigated the strain hardening and DRX behavior of ZK60 magnesium alloy during hot deformation.…”

Section: Introductionmentioning

confidence: 99%

The kinetics of dynamic recrystallization of 42CrMo steel

Chen

Lin

2012

Materials Science and Engineering: A

174

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“…According to Table 2, it is can be seen that the critical strain changes over strain rate and temperature. The influence of strain rate and temperature on the critical strain can be described by Sellars model as follows [28][29]:…”

Section: Drx Kinetic Model 41 Critical Conditions For Drx Initiationmentioning

confidence: 99%

Quantitative Analysis of Dynamic Softening Behaviors Induced by Dynamic Recrystallization for Ti-10V-2Fe-2Al Alloy

Quan

Wen

et al. 2015

High Temperature Materials and Processes

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In order to investigate the effect of dynamic recrystallization (DRX) behavior on dynamic softening behavior of wrought Ti-10V-2Fe-3Al titanium alloy, a series of laboratory scale isothermal hot compression tests with a height reduction of 60% were performed in a temperature range of 948 K∼1023 K in the (s + b) phase field, and a strain rate range of 0.01∼10 s −1 on a Gleeble-3500 thermomechanical simulator. The flow curves show a continuous softening at all strain rate after peak stress. The constitutive equation and the DRX kinetic mold were established to study the dynamic softening based on the flow curves. By the regression analysis for conventional hyperbolic sine equation, the activation energy was determined as Q = 479.4169 kJ·mol −1 , According to the strain hardening rate curves (ds/de versus s ), two characteristic parameters including the critical strain for DRX initiation (e c ) and the strain for peak stress (e p ) were identified, and the linear dependence of the critical strain (e c ) for DRX initiation on the strain for peak stress (e p ) can be specified by the equation: e c = 0.5667e p . A modified Avrami type equa-was introduced to characterize the evolution of DRX volume fraction. The evolution of DRX volume was described as the following: for a fixed strain rate, the strain required for the same amount of DRX volume fraction increases with decreasing deformation temperature, in contrast, for a fixed temperature, it increases with increasing strain rate. Finally, the impact of dynamic recrystallized behavior on degree of dynamic softening became weaker and weaker with the increasing of temperature for the strain rate of 0.01 s −1 , 0.1 s −1 , 1 s −1 and 10 s −1 , due to the volume of a phase decreased with the increasing of temperature.

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Study of the dynamic recrystallization of Ti–6.5Al–3.5Mo–1.5Zr–0.3Si alloy in β-forging process via Finite Element Method modeling and microstructure characterization

Cited by 65 publications

References 32 publications

An experimental study of deformation mechanism and microstructure evolution during hot deformation of Ti–6Al–2Zr–1Mo–1V alloy

An experimental study of deformation mechanism and microstructure evolution during hot deformation of Ti–6Al–2Zr–1Mo–1V alloy

The kinetics of dynamic recrystallization of 42CrMo steel

Quantitative Analysis of Dynamic Softening Behaviors Induced by Dynamic Recrystallization for Ti-10V-2Fe-2Al Alloy

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