Effect of initial microstructure on the processing of titanium using equal channel angular pressing

Dheda, Shehreen S.; Mohamed, Farghalli A.

doi:10.1016/j.msea.2011.07.032

Cited by 30 publications

(9 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was found that route BC is an optimum route for reaching to a homogeneous microstructure with equiaxed grains which are separated by high-angle grain boundaries [22]. To reduce the frictional forces during the test, MoS 2 paste was used on the contacting surfaces [23].…”

Section: Methodsmentioning

confidence: 99%

Processing and characterization of nanostructured Grade 2 Ti processed by combination of warm isothermal ECAP and extrusion

Eftekhari

Faraji

Nikbakht

et al. 2017

Materials Science and Engineering: A

View full text Add to dashboard Cite

In this study, combined multi pass equal channel angular pressing (ECAP), and subsequent warm extrusion at different temperatures are performed on commercial purity titanium. Mechanical and microstructural evolutions are then investigated. Since it was observed that the four passes ECAP processed sample showed the best strength and reasonable elongation, this sample was selected for studying the extrusion temperature effects on the structure and mechanical properties of Grade 2 titanium. Therefore, the 4th passes ECAP processed sample was extruded at different temperatures of 300 °C, 350 °C, 400 °C, 450 °C and 500 °C. The result revealed that the best mechanical properties were achieved from the specimen processed by four passes ECAP followed by warm extrusion at 300°C. The strength, and hardness of this sample were considerably improved in comparison with that of the unprocessed sample. Also, its ultra-fine grained and nanograined microstructure were homogeneous, with a grain size ranged from 40-200 nm with an average grain size of about 123 nm. It was seen that the mechanical properties of some samples after applying this combined process (ECAP + warm extrusion) are 2 comparable with those of Grade 5 titanium which is commonly used in medical applications but contains alloying elements that are toxic to human health.

show abstract

Section: Methodsmentioning

confidence: 99%

Processing and characterization of nanostructured Grade 2 Ti processed by combination of warm isothermal ECAP and extrusion

Eftekhari

Faraji

Nikbakht

et al. 2017

Materials Science and Engineering: A

View full text Add to dashboard Cite

show abstract

“…Pure titanium has played an important role in aerospace and biomedical fields due to its high strength-to-weight ratio, excellent corrosion resistance and biocompatibility [1,2]. However, the application of pure Ti is often limited by its insufficient mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Effects of annealing on microstructure and mechanical properties of nano-grained titanium produced by combination of asymmetric and symmetric rolling

et al. 2012

Materials Science and Engineering: A

View full text Add to dashboard Cite

“…As illustrated by the Hall-Petch relation, the strength of a material is reversely proportional to its grain size, and the ultrafinegrained materials processed by HPT can achieve extremely high strength or superplasticity (Sergueeva et al, 2001). In comparison with other major SPD methods (Yang et al, 2008;Dheda and Mohamed, 2011;Zhen et al, 2021), such as ECAP, ARB, and MDF, HPT processing is more effective in grain refinement, and hence lower in manufacturing cost. Furthermore, the compression strain introduced by hydrostatic pressure, and the shear strain introduced by torsional deformation, creates sufficient deformation for various alloys.…”

Section: Introductionmentioning

confidence: 99%

The microstructural, textural, and mechanical effects of high-pressure torsion processing on Mg alloys: A review

et al. 2022

View full text Add to dashboard Cite

Magnesium (Mg) alloys attract considerable attention in the fields of aerospace, defense technology, and automobile production, owing to the advantages of their low density, their highly specific strength/stiffness, and their good damping and electromagnetic shielding performance. However, low strength and poor ductility limit further application. Severe plastic deformation is considered the most promising means of producing ultrafine-grained Mg alloys and improving their mechanical properties. To this end, high-pressure torsion (HPT) is one of the most effective techniques. This article outlines the microstructure, texture, and mechanical properties of Mg alloys processed using HPT. The effects of deformation parameters, such as processing temperature, turns, applied pressure, and rotation speed, on the grain refinement and secondary phases are discussed. Textural evolution is detailed in light of both intrinsic and extrinsic factors, such as cumulative strain and the composition of the alloy elements. The subsequent enhancement of mechanical properties and mechanisms, and the significant contribution of the HPT process to strength are further reviewed. Given the advantages of HPT for grain refinement and structural modification, researchers have proposed several novel processes to extend the industrial application of these alloys.

show abstract

Effect of initial microstructure on the processing of titanium using equal channel angular pressing

Cited by 30 publications

References 26 publications

Processing and characterization of nanostructured Grade 2 Ti processed by combination of warm isothermal ECAP and extrusion

Processing and characterization of nanostructured Grade 2 Ti processed by combination of warm isothermal ECAP and extrusion

Effects of annealing on microstructure and mechanical properties of nano-grained titanium produced by combination of asymmetric and symmetric rolling

The microstructural, textural, and mechanical effects of high-pressure torsion processing on Mg alloys: A review

Contact Info

Product

Resources

About