Effect of β (110) texture intensity on α-variant selection and microstructure morphology during β→α phase transformation in near α titanium alloy

Zhao, Zibo; Wang, Q.J.; Hu, Qing‐Miao; Liu, J.R.; Yu, Bin; Yang, Rui

doi:10.1016/j.actamat.2016.12.069

Cited by 111 publications

(17 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After the initial β forging, a lamellar α p microstructure formed by β→α transformation. Since the cooling process obeys Burger's orientation relationship (BOR), the main misorientations between neighboring α colonies should be focused on nearby 10 • , 60 • and 90 • [13,27]. Furthermore, the material experienced deformation in the α+β phase field, which disrupted the BOR among α plates, and many low angle boundaries (LABs) appeared in deformed grains, as is seen in Figure 6.…”

Section: Analysis and Discussionmentioning

confidence: 99%

Development of a Flow Localization Band and Texture in a Forged Near-α Titanium Alloy

Zheng

Tang

Zhou

et al. 2020

Metals

View full text Add to dashboard Cite

This work investigated crystallographic textures and the features of a flow localization band in a forged Ti6242S billet. The flow localization band experienced a large strain and grains within it were elongated under shear stress. The main macrotextural components were made up of (11 2 ¯ 0)/<10 2 ¯ 0>, <0002>/axial direction, and a static recrystallization texture (11 2 ¯ 0)/(3 3 ¯ 02), which can be explained by motion of a prismatic <a> slip system and a newly proposed method of projection. Finally, three types of macrozone, each with a sharp defined texture were observed and subsequently, it was demonstrated that the formation of macrozones was only connected with parameters of thermomechanical processing and was independent of variants selection.

show abstract

Section: Analysis and Discussionmentioning

confidence: 99%

Development of a Flow Localization Band and Texture in a Forged Near-α Titanium Alloy

Zheng

Tang

Zhou

et al. 2020

Metals

View full text Add to dashboard Cite

show abstract

“…The α phase presents as a hexagonal close-packed (HCP) structure, which is stable at room temperature. Generally, the α phase has three different microstructural morphologies, namely the lamellar, equiaxed and basket-weave shapes 8,9 .…”

Section: Introductionmentioning

confidence: 99%

“…The β phase exhibits a body-centered cubic (BCC) structure, which is stable at high temperature. The β phase always exists in the form of equiaxed microstructure at high temperature 8 . At a specific transition temperature, α and β phases can transform between each other.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution and Phase Transformation of a Ti-5Nb-5Al Alloy During Annealing Treatment

Dai

Song

2019

Mat. Res.

View full text Add to dashboard Cite

The microstructural evolution and phase transformation of a Ti-5Nb-5Al alloy during isothermal annealing treatment were studied in this paper. The microstructural evolution was analyzed by X-ray diffraction (XRD), scanning electron microscope (SEM) equipped with X-ray energy dispersive spectroscopy (EDS) and electron backscattering diffraction (EBSD). The first-principle calculation by density functional theory method was performed to analyze the effect of niobium diffusion on the α to β transformation. The results showed that the α phase initially grew by merging neighboring grains and then by boundary splitting with increasing the solution time below the β-transus temperature. However, the α phase disappeared absolutely above the β-transus temperature. According to the thermodynamic analysis by DFT calculations, the diffusion of niobium from β to α phase can promote the α to β transformation. After quenching in water, the acicular α' phase precipitated from β matrix with an orientation relationship of {110} bcc ||{0001} hcp and <111> bcc ||<1120> hcp , and thus increased the hardness of the alloy.

show abstract

“…It has been demonstrated that the parent β state has significant effect on the on the product α phase, in terms of textures, variant selections, etc. [1][2][3][4]. For the β-solidifying TiAl alloys, there is also a β→α transformation subsequent to the solidification, but only a few efforts have been paid on this topic to date.…”

Section: Introductionmentioning

confidence: 99%

Deformation Behavior of a β-Solidifying TiAl Alloy within β Phase Field and Its Effect on the β→α Transformation

Chen

Liu

Yang

et al. 2018

Metals

View full text Add to dashboard Cite

In this study, the deformation behavior of a Ti-40Al-10V (at.%) alloy within β single phase field was examined by means of isothermal compression at 1300 °C under strain rates of 2 s−1, 0.2 s−1, and 0.02 s−1, as well as its effect on the subsequent β→α transformation. The results showed that the alloy behaved steady-state flow with dislocation creep as the predominant rate-controlling process. Dynamic recrystallization (DRX) evidently occurred during deformation, and its volume fraction was dramatically increased so that at the lowest strain rate (0.02 s−1), a full-DRX β structure was obtained. The preferentially dynamic migration of grain boundaries with <100> orientation was demonstrated to be the major DRX mechanism. The texture was characterized by a <100> + <111> double-fiber at 2 s−1, but gradually transformed into a simple rotated cube orientationunder 0.02 s−1, accompanied by a decreasing texture intensity. During the subsequent β→α transformation, two types of α morphology wereproduced with evident variant selection, namely, the Widmannstatten colony and martensitic laths. Texture simulation revealed that the α texture was solely determined by parent β texture, despite of the variant selections.

show abstract

Effect of β (110) texture intensity on α-variant selection and microstructure morphology during β→α phase transformation in near α titanium alloy

Cited by 111 publications

References 22 publications

Development of a Flow Localization Band and Texture in a Forged Near-α Titanium Alloy

Development of a Flow Localization Band and Texture in a Forged Near-α Titanium Alloy

Microstructural Evolution and Phase Transformation of a Ti-5Nb-5Al Alloy During Annealing Treatment

Deformation Behavior of a β-Solidifying TiAl Alloy within β Phase Field and Its Effect on the β→α Transformation

Contact Info

Product

Resources

About