Structure and mechanism of the deformation of Grade 2 titanium in plastometric studies

Bańczerowski, Jakub; Jeleńkowski, J.; Skalski, Konstanty; Sawicki, S.; Wachowski, Marcin

doi:10.1080/02670836.2018.1443608

Cited by 4 publications

(9 citation statements)

References 22 publications

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“…2. The required constants in the Arrhenius equation and the procedure of obtaining them was presented in the previous work [20]. Data obtained from the experiment allowed for calculation parameters necessary to attain theoretical stresses.…”

Section: Experiments Results and Arrhenius Model Calculationsmentioning

confidence: 99%

“…The sample deformed at the temperature of 875 K, atε = 10 1 , was selected for a scanning electron microscope (SEM) and scanning transmission electron microscope (STEM) observations. Such a choice was dictated by the fact that with such parameters of plastic forming, the grain disintegration should be the highest [20].…”

Section: Materials Observationsmentioning

confidence: 99%

“…Fig. 8 Histogram of the frequency of equivalent grains diameter of initial state with the determined size of 2-8 µm and sample deformed at the temperature of 875 K with the maximum frequency size in the range below 2 µm [20] In the paper, the TMP applied to CP titanium was mathematically modelled. We adopted four models to describe the process.…”

Section: Materials Observationsmentioning

confidence: 99%

“…In our previous work, Arrhenius equation was chosen as the potentially most promising. However, our experimental and analytical studies showed that this equation was accurate in the case of the pure titanium only in certain circumstances [20,21]. Therefore, other models were taken into consideration.…”

Section: Introductionmentioning

confidence: 96%

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New approach in constitutive modelling of commercially pure titanium thermo-mechanical processing

Bańczerowski

Pawlikowski

2021

Continuum Mech. Thermodyn.

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The pure titanium, as a biomaterial destined for production of load-demanding prostheses, requires thermo-mechanical processing to increase its strength. The most common way to achieve this is the method of grain fragmentation. Thermo-mechanical deformation of titanium is a complex process, which makes it very difficult to describe it by means of constitutive equations. Such constitutive relations are very useful as they can be implemented in the finite element method tools in order to simulate and optimize the whole process. Cylindrical specimens were compressed at elevated temperatures on a thermo-mechanical simulator. The tests were performed at four different strain rates (from 10$$^{\mathrm {-2}}$$ - 2 s$$^{\mathrm {-1}}$$ - 1 to 10 s$$^{\mathrm {-1}})$$ - 1 ) and at 775 K and 875 K temperatures. The collected data allowed us to create strain–stress graphs characterizing the process. Observations on the scanning electron microscope and scanning transmission electron microscope were done as well as the electron backscatter diffraction analysis, revealing significant grain fragmentation. The aim of the studies described in the paper was to verify and select a proper mathematical model for the process of titanium grain fragmentation obtained in a thermoplastic process. Four different constitutive models were considered. The calculation of theoretical stress values based on the Arrhenius-type equation, Anand viscoplastic model, Johnson–Cook model and Khan Huang-Liang model was done and compared to experimental results. The theoretical curves were generated and fitted to experimental, which made it possible to calibrate the constants in the mathematical models. The curve-fitting analyses showed that the Anand constitutive model described the titanium behaviour best.

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Section: Experiments Results and Arrhenius Model Calculationsmentioning

confidence: 99%

Section: Materials Observationsmentioning

confidence: 99%

Section: Materials Observationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

See 2 more Smart Citations

New approach in constitutive modelling of commercially pure titanium thermo-mechanical processing

Bańczerowski

Pawlikowski

2021

Continuum Mech. Thermodyn.

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“…The reduction of energy consumption, especially in the automotive and aerospace industry is one of the greatest challenges facing modern civilization. This task can be accomplished by replacing the previously used materials with their lighter counterparts and introducing new technologies in the production process [1,2]. A visible example of this trend is the wide use of aluminum alloys, especially in the aerospace and automotive industries [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Residual Stresses of AA2519 Friction Stir Welded Joints under Different Heat Treatment Conditions

et al. 2020

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The aim of this research was to investigate the effect of different heat treatment conditions of AA2519 friction stir welded joints on their microstructure and residual stresses. The following welding parameters have been used: 500 rpm tool rotation speed, 150 mm/min tool traverse speed, tool tilt angle 2°, pressure force 17 kN. The welded material was investigated in three different configurations: HT0, HT1, and HT2. The first type of weld (HT-0) was made using AA2519 alloy in non-precipitation hardened state and examined in such condition. The second type of weld (HT-1) has been performed on AA2519-T62, that corresponds to precipitation hardening condition. The last type of weld (HT2) was performed on annealed AA2519 and the obtained welds were subjected to the post-weld precipitation hardening process. The heat treatment was carried out in two stages: solution heat treatment (530 °C/2 h + cooling in cold water) and aging (165 °C/1 0 h). Residual stresses were measured using X-Ray diffraction patterns obtained from Bruker D8 Discover X-ray diffractometer utilizing the concepts of Euler cradle and polycapillary primary beam optics. The conducted research indicates that the best material properties: homogenous microstructure and uniform distribution of microhardness and compressive state of residual stresses were obtained for the HT-2 series samples subjected to heat treatment after the friction stir welding (FSW) process.

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Titanium

Francis

2019

Materials Science and Technology

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Structure and mechanism of the deformation of Grade 2 titanium in plastometric studies

Cited by 4 publications

References 22 publications

New approach in constitutive modelling of commercially pure titanium thermo-mechanical processing

New approach in constitutive modelling of commercially pure titanium thermo-mechanical processing

Microstructure and Residual Stresses of AA2519 Friction Stir Welded Joints under Different Heat Treatment Conditions

Titanium

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