Processing of ultrafine-grained titanium with high strength and good ductility by a combination of multiple forging and rolling

Bézi, Zoltán; Krállics, György; El-Tahawy, Moustafa; Pekker, Péter; Gubicza, Jenő

doi:10.1016/j.msea.2017.01.112

Cited by 17 publications

(5 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2c-g). A similar effect has been also reported in several prior works [6,18]. The genesis of this phenomenon is considered in the present section.…”

Section: Specific Character Of Continuous Dynamic Recrystallization I...supporting

confidence: 89%

“…To promote the grain-refinement effect and minimize cracking, processing is often conducted at a temperature between 400 and 500 °C (~0.35-0.40T m , where T m is the melting point). In other instances, "abc" deformation is applied at 200-350 °C (~0.24-0.32T m ) [6,18] or even ambient conditions [5,[16][17][18]. In such cases, a relatively-low strain per pass (~10-25 pct.)…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The unusual character of microstructure evolution during “abc” deformation of commercial-purity titanium

Mironov

Zherebtsov

Semiatin

2022

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…2c-g). A similar effect has been also reported in several prior works [6,18]. The genesis of this phenomenon is considered in the present section.…”

Section: Specific Character Of Continuous Dynamic Recrystallization I...supporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

The unusual character of microstructure evolution during “abc” deformation of commercial-purity titanium

Mironov

Zherebtsov

Semiatin

2022

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…Rolling is an important way to effectively produce titanium alloy through plastic deformation. According to statistics, in the production of titanium alloy, the ton number of rolled titanium alloy accounts for more than half of the total production number of titanium alloy [3,4]. Hot rolling is a very critical stage in the production of titanium alloy.…”

Section: Introductionmentioning

confidence: 99%

Chemical- and Mechanical-Induced Lubrication Mechanisms during Hot Rolling of Titanium Alloys Using a Mixed Graphene-Incorporating Lubricant

Kong

Zhang

et al. 2020

Nanomaterials

View full text Add to dashboard Cite

Hot rolling of titanium alloy currently is carried out without lubrication because of the surface defects. In order to explore an effective lubrication scheme to reduce friction and wear during hot rolling of titanium alloy, a mixed graphene-incorporating lubricant has been proposed to study its lubrication performance and mechanism. The tribological experiments were carried out by ball-disk friction and wear tester under hot-rolling parameters. Scanning electron microscopy (SEM), X-ray energy spectrum analyzer (EDS), X-ray powder diffractometer (XRD) and Raman analysis were used to analyse the surface and cross-section of the wear marks on the samples after the tribological experiments. The results show that the friction coefficient decreases up to about 35% compared with tests under dry and lubricated conditions. The surface quality of the wear marks is improved significantly after applying the proposed lubricant. The graphene which is embedded in the phosphate film can be effectively applied as a lubricating material to strengthen the lubricating film with less combustion loss at high temperatures. A chemical- and mechanical-induced lubrication mechanism for the hot rolling of titanium sheets has been proposed due to the synergistic lubrication effect of the graphene, ZrO2 nano particles and phosphate. It is of great significance and potential value to apply this proposed lubricant as an effective way to reduce the wear, friction and oxidation during the hot-rolling process of titanium alloy.

show abstract

“…But, isothermal precision forging process with the advantage of superplasticity of the fine-grained γ-TiAl based alloys under low strain rates (10 −3 s −1 -10 −5 s −1 ) and suitable deformation temperatures is a promising method to form those complex components with excellent mechanical properties [7,8]. In addition, comparing with that fine grain titanium alloys were generally obtained via multiple passes of multiaxial deformation around phase transition temperature [9,10], γ-TiAl based alloys with ideal equiaxed microstructure can be easily produced by a few steps uniaxial canned forging due to being prone to dynamic recrystallization (DRX) of γ-TiAl phase during deformation [11,12]. As we know, in the practical isothermal forging process, the deformation of the billet is mainly conducted under compressive stress state, and the deformation at different stages of the process and in different parts of the billet could be controlled by different mechanisms (i.e., dislocation creep versus grain boundary sliding (GBS)) corresponding to different deformation conditions (i.e., non-superplastic condition versus superplastic condition).…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution of a High Nb Containing TiAl Alloy with (α2 + γ) Microstructure during Elevated Temperature Deformation

Chu

Zhu

et al. 2018

Metals

View full text Add to dashboard Cite

In order to verify the correctness of the transition of deformation mechanism with the change in deformation parameters and to reveal the types and mechanism of dynamic recrystallization of γ grains during compression deformation, microstructure characterization of Ti-43.5Al-8Nb-0.2W-0.2B (at. %) alloy after isothermal compression deformation were performed. When the alloy was deformed at 1000 • C/10 −2 s −1 , the initial γ grains are elongated and significantly refined and the fraction of low angle grain boundaries (LAGB) of γ grains is obviously increased and the texture intensity remains unchanged, which indicates that the compression deformation in dislocation creep region is dominated by intragranular deformation and dynamic recrystallization (DRX) of γ grains. Besides, the lattice rotation at grain boundary serrations may be responsible for the nucleation of new recrystallized γ grains, and the following growth process may be achieved by the migration of γ grain boundaries. However, when the alloy deformed at 1050 • C/10 −4 s −1 and 1000 • C/10 −4 s −1 , the γ grains maintain equiaxed shapes and distribute more uniformly and the fraction of LAGB of γ grains is slightly raised and the texture sharpness decreases, which indicates that the compression deformation in grain boundary sliding (GBS) region is mainly controlled by GBS of γ grains and DRX occurs simultaneously within some coarse γ grains.

show abstract

Processing of ultrafine-grained titanium with high strength and good ductility by a combination of multiple forging and rolling

Cited by 17 publications

References 23 publications

The unusual character of microstructure evolution during “abc” deformation of commercial-purity titanium

The unusual character of microstructure evolution during “abc” deformation of commercial-purity titanium

Chemical- and Mechanical-Induced Lubrication Mechanisms during Hot Rolling of Titanium Alloys Using a Mixed Graphene-Incorporating Lubricant

Microstructure Evolution of a High Nb Containing TiAl Alloy with (α2 + γ) Microstructure during Elevated Temperature Deformation

Contact Info

Product

Resources

About