Research on Three-Roll Screw Rolling Process for Ti6Al4V Titanium Alloy Bar

Ding, Xiaoming; Sun, Liyuan; Xu, Huibin; Zhao, Zhiye

doi:10.1515/htmp-2016-0215

Cited by 11 publications

(7 citation statements)

References 7 publications

(7 reference statements)

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“…The radial shear rolling (RSR) process is used for rolling round bars made of various metallic materials, including steel [ 17 , 18 ], titanium alloys [ 19 , 20 ], magnesium alloys [ 21 , 22 ], aluminum alloys [ 23 , 24 ] and zirconium alloys [ 25 ]. This process was developed at MISIS (National University of Science and Technology, Moscow, Russia) initially as a tube-forming process, and then adapted to produce round bars [ 26 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Changes in the Properties in Bimodal Mg Alloy Bars Obtained for Various Deformation Patterns in the RSR Rolling Process

et al. 2022

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The paper presents the theoretical and experimental research conducted to date regarding the possibility of obtaining round bars from AZ31 magnesium alloy with a bimodal structure rolled in the radial shear rolling process (RSR) technology. There is no analysis of the impact of the deformation path (distribution of deformation in individual passes) on the mechanical properties and the obtained bar structure. The feedstock, namely, AZ31 magnesium alloy round bars with a diameter of 30 mm, were rolled in RSR to the final diameter of 15 mm with different levels of deformation in successive passes, at a temperature of 400 °C. The bars obtained as a result of the RSR rolling process have different hardness on the cross-section as well as a characteristic gradient grain size distribution. Based on the conducted research, it can be concluded that the use of a larger number of passes with a smaller cross-section reduction will result in an improved formation of a bimodal structure consisting of a highly fragmented near-surface structure and in the half of the radius of the structure of fragmented grains at the boundaries of larger grains.

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Section: Introductionmentioning

confidence: 99%

Changes in the Properties in Bimodal Mg Alloy Bars Obtained for Various Deformation Patterns in the RSR Rolling Process

et al. 2022

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“…The UTS reached 921 MPa, and TE was measured at 18.4%. X. Ding et al [ 19 ] controlled the original grain size through different heat treatment temperatures and then carried out a three-roll screw-rolling process and subsequent heat treatment on Ti-6Al-4V alloy bars. Finally, a material with significant differences in microstructure and mechanical properties was obtained, and the results showed that the bimodal microstructure with α grains accounting for about 40% had higher tensile strength when the area reduction rate was close.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Microstructure and Mechanical Properties of Ti-6Al-4V Alloy under Heat Treatment and Multi-Axial Forging

Du,

Song,

et al. 2024

Materials

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The mechanical properties of various Ti-6Al-4V alloys are influenced by their respective microstructures. This study generated an ultrafine-grain (UFG) Ti-6Al-4V alloy featuring bimodal grain distribution characteristics achieved through initial heat treatment, multi-axial forging (MF), and annealing. The study also extensively examined the evolution process of the alloy’s microstructure. By subjecting the materials to heat treatments at 900 °C with air cooling and 950 °C with air cooling, both materials were found to be consisted of primary α (αp) and transformed β (αs+β) regions with different proportions. Following MF, the sample treated at 900 °C displays a microstructure featuring UFGs of α+β surrounding larger micron-sized αp grains. On the other hand, the sample treated at 950 °C displays a microstructure distinguished by twisted αs lamellar and fragmented β grains surrounding larger micron-sized αp grains. Following annealing, no significant grain growth was observed in the sample. The geometrically necessary dislocations (GNDs) within the UFGs were eliminated, though some GNDs persisted within the αp grains. The samples undergoing the 900 °C heat treatment, MF, and subsequent annealing exhibited elevated strength (1280 MPa) and total elongation (10.7%). This investigation introduces a novel method for designing the microstructure of the Ti-6Al-4V alloy to achieve superior performance.

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“…These changes are due to the kinematic condition of the material helical flow [6]. The effects of the three-high RSR on the microstructure and properties formation were investigated for the following materials: titanium alloys [7][8][9][10], copper alloys [11], magnesium alloys [12][13][14][15], nickel alloys [16], zirconium alloys [17], and aluminum alloys [18,19]. The effect of the three-high RSR on the microstructure and properties formation was also studied when rolling steels of different chemical compositions and for different purposes [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Research of Three-High Screw Rolling of Aluminum Billets with Copper Inserts at Different Rolls Feed Angles

Skripalenko,

Rogachev,

Bazhenov

et al. 2023

Metals

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Three-high screw-rolling of aluminum alloy ingots was carried out at 12- and 20-degrees rolls feed angles. The ingots had two copper, cylindrical inserts oriented along the ingot axis: the center of one insert coincided with the ingot’s center, and the center of the other insert coincided with the ingot’s half-radius. The effect of the rolls feed angle value on the aluminum and copper microstructure as well as the hardness formation was established. X-ray study and three-dimensional modeling allowed the copper insert twisting angle to be estimated along the rolled billet axis. It also allowed detection of the number of breaks of the insert located in the ingot’s center and the insert located in the ingot’s half-radius depending on the rolls feed angle value.

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Research on Three-Roll Screw Rolling Process for Ti6Al4V Titanium Alloy Bar

Cited by 11 publications

References 7 publications

Changes in the Properties in Bimodal Mg Alloy Bars Obtained for Various Deformation Patterns in the RSR Rolling Process

Changes in the Properties in Bimodal Mg Alloy Bars Obtained for Various Deformation Patterns in the RSR Rolling Process

Evolution of Microstructure and Mechanical Properties of Ti-6Al-4V Alloy under Heat Treatment and Multi-Axial Forging

Research of Three-High Screw Rolling of Aluminum Billets with Copper Inserts at Different Rolls Feed Angles

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