Dynamic globularization kinetics during hot working of Ti-17 alloy with initial lamellar microstructure

Wang, Kaixuan; Zeng, Weidong; Zhang, Yongqing; Lai, Yunjin; Zhou, Yigang

doi:10.1016/j.msea.2010.01.034

Cited by 106 publications

(36 citation statements)

References 16 publications

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“…Dynamic recovery of the β phase is quite common during hot deformation, and recrystallization occurs under some special deformation processes [11,12]. Dynamic recrystallization of a hot-rolled titanium and its effects were studied by Chen et al [13].…”

Section: Introductionmentioning

confidence: 99%

The Formation of Strong {100} Texture by Dynamic Strain-Induced Boundary Migration in Hot Compressed Ti-5Al-5Mo-5V-1Cr-1Fe Alloy

Yang

2017

Metals

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Abstract:The microstructure and texture evolution of Ti-5Al-5Mo-5V-1Cr-Fe alloy during hot compression were investigated by the electron backscatter diffraction technique. The results reveal that two main texture components containing <100> and <111> fiber textures form after the hot compression. The fraction of each component is mainly controlled by deformation and strain rate. Dynamic strain-induced boundary migration (D-SIBM) is proved to be the reason that <100>-oriented grains grow towards <111>-oriented grains. The <100>-oriented grains coarsen with the increasing <100> texture intensity. Dynamic recrystallization (DRX) occurs under a low strain rate and large deformation. The DRX grains were detected by the method of grain orientation spread. The DRX grains reserve a <100> fiber texture similar to the deformation texture; however, DRX is not the main reason causing the formation of a strong <100> texture, due to its low volume fraction.

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Section: Introductionmentioning

confidence: 99%

The Formation of Strong {100} Texture by Dynamic Strain-Induced Boundary Migration in Hot Compressed Ti-5Al-5Mo-5V-1Cr-1Fe Alloy

Yang

2017

Metals

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“…It was developed primarily for gas turbine engine components, such as disks for fan and compressor stages [13]. The regular characteristics of material flow behaviour and globularization during hot working of Ti-17 with initial lamellar microstructure was reported by Wang et al [10,12,13]. It has been found that all the flow stress curves exhibit a noticeably flow softening and globularization of lamellar a phase.…”

Section: Application To Ti-17 Alloymentioning

confidence: 92%

“…The second term models the static recovery of dislocations. The third term is related to the reduction of dislocation density due to the globularization of lamellar a, which is mainly achieved through recrystallization [12,27]. More details of the evolution of globularization, S, is given in Section 2.5.…”

Section: Evolution Of Dislocation Densitymentioning

confidence: 99%

“…The mechanism of globularization has been extensively studied and it is found that the globularization is mainly achieved through recrystallization [12,27]. Referring to the dynamic recrystallization models proposed by Lin et al [26] and the globularization equation proposed by Gao et al [23], the evolution of volume fraction of globularization can be formulated as:…”

Section: Modelling Of Dynamic Globularization Of Lamellar Amentioning

confidence: 99%

“…It has been reported that the globularization is initiated at a critical strain and the globularization fraction increases with strain in a sigmoid way [9,11]. The Avramitype equation is often employed to depict the variation of globularization fraction with strain [9,11,12]. A backpropagation artificial neural network (ANN) based model was developed by Wang et al [13] for predicting the dynamic globularization fraction of Ti-17 alloy during hot forming.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Unified constitutive modelling for two-phase lamellar titanium alloys at hot forming conditions

Yang

Wang

et al. 2016

Manufacturing Rev.

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-In this paper, a set of mechanism based unified viscoplastic constitutive equations have been established for two-phase titanium alloys with initial lamellar microstructure, which models the softening mechanisms of the alloys in hot forming conditions. The dislocation density, rotation and globularization of lamellar a-phase and their effects on flow behaviour can also be modelled. The values of material constants in the equation set have been calibrated, according to stress-strain curves and globularization fractions of lamellar a-phase obtained from compression tests at a range of temperatures and strain rates, using a genetic algorithm (GA) based optimisation method. Based on the determined constitutive equations, flow stress and globularization evolution of Ti-17 and TA15 alloys at different temperatures and strain rates were predicted. Good agreements between the experimental and computed results were obtained.

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Effect of Heat Treatment in Two‐Phase Region on Equiaxed Variation Law of TC18 Alloy

Liu¹,

Ma²,

Wei³

et al. 2016

Proceedings of the 13th World Conference on Titanium

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Dynamic globularization kinetics during hot working of Ti-17 alloy with initial lamellar microstructure

Cited by 106 publications

References 16 publications

The Formation of Strong {100} Texture by Dynamic Strain-Induced Boundary Migration in Hot Compressed Ti-5Al-5Mo-5V-1Cr-1Fe Alloy

The Formation of Strong {100} Texture by Dynamic Strain-Induced Boundary Migration in Hot Compressed Ti-5Al-5Mo-5V-1Cr-1Fe Alloy

Unified constitutive modelling for two-phase lamellar titanium alloys at hot forming conditions

Effect of Heat Treatment in Two‐Phase Region on Equiaxed Variation Law of TC18 Alloy

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