Mechanical and wear properties of ultrafine-grained pure Ti produced by multi-pass equal-channel angular extrusion

Pürçek, G.; Saray, Onur; Kul, Oktay; Караман, И.; Yapıcı, Güney Güven; Haouaoui, M.; Maier, Hans Jürgen

doi:10.1016/j.msea.2009.03.054

Cited by 123 publications

(57 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The H-P relationship for Ti; [81] grades 1 to 4 denote increasing orders of impurities for Fe, N and O and using experimental data. [81][82][83][84][85][86][87][88][89][90][91][92][93][94][95][96][97][98][99][100] Figure 4. The H-P relationship for coarse-grained and HPT processed Al-5% Mg; [103] with increasing numbers of turns, HAGBs develop and the H-P relationship is followed so that data from coarse grain samples fall on the same line as HPT specimens.…”

Section: Figure Captionsmentioning

confidence: 99%

The Strength–Grain Size Relationship in Ultrafine-Grained Metals

Balasubramanian

Langdon

2016

Metall Mater Trans A

View full text Add to dashboard Cite

Metals processed by severe plastic deformation [SPD] techniques, such as equal-channel angular pressing [ECAP] and high-pressure torsion [HPT], generally have submicrometer grain sizes. Consequently, they exhibit high strength as expected on the basis of the HallPetch [H-P] relationship. Examples of this behavior are discussed using data on Ti, Al-Mg 1 and Ni. These materials typically have grain size above ~50 nm where softening is not expected. An increase in strength is usually accompanied by a decrease in ductility. High strength and ductility can be achieved simultaneously by imposing high strains to give both ultrafine grain sizes and a high fraction of high-angle grain boundaries. An example is presented for a cast Al-7% Si alloy processed by HPT. In some cases, SPD may produce a fine grain size but also lead to a weakening due to microstructural changes as in ECAP of an Al-7034 alloy and HPT of Zn-22% Al. In SPD-processed materials, grain boundary segregation and nanostructural features are present which may lead to higher strengths than those predicted by the H-P relationship in some alloys having nano grain sizes.

show abstract

Section: Figure Captionsmentioning

confidence: 99%

The Strength–Grain Size Relationship in Ultrafine-Grained Metals

Balasubramanian

Langdon

2016

Metall Mater Trans A

View full text Add to dashboard Cite

show abstract

“…Severe plastic deformation (SPD) methods applied to metals enable specific microstructural and substructural features to be formed during the processing resulting in an unexpected combination of mechanical properties [2,3]. Formation of such structures in materials causes microstructural refinement to the ultrafine-grained (UFG) or even nanocrystalline (NC) area [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Severe Plastic Deformation and Heat Treatment on CuCrZr Alloys

et al. 2017

View full text Add to dashboard Cite

CuCrZr alloy was subjected to equal channel angular pressing method, belonging to the severe plastic deformation group, followed by heat treatment under different ageing conditions to optimize mechanical properties of the alloy. Before equal channel angular pressing, CuCrZr alloy was treated by solution annealing at temperature 1020 • C for 1 h. Afterwards, samples were pressed through an equal channel angular pressing die once at room temperature and subjected to artificial ageing under different conditions (200, 400, 450, 480 • C for 30, 60, 90, 120, 150 min). Optimization of the CuCrZr alloy was done through the study of mechanical properties and microhardness as a function of ageing temperature and time considering the progress in microstructural/substructural features.

show abstract

“…These alloys must exhibit excellent bulk properties, such as low elastic modulus associated to excellent biocompatibility and corrosion resistance. Elements such as niobium (Nb), zirconium (Zr), molybdenum (Mo) and tantalum (Ta) are strong candidates since they allow the reduction of alloy is elastic modulus reaching values closer that of the bone (10-40 GPa) [3][4][5][6][7][8][9][10] . In particular, the Ti-30Ta alloy with α'' phase (martensite) has been shown as viable for applications in the manufacture of prostheses due to its excellent corrosion resistance and differentiated combination of low elastic modulus and high mechanical strength 5,11,12 .…”

Section: Introductionmentioning

confidence: 99%

Corrosion Resistance After Mechanical Deformation of the Ti30Ta Experimental Alloy for Using in Biomedical Applications

et al. 2017

View full text Add to dashboard Cite

In this study the corrosion resistance of Ti30Ta experimental alloy was evaluated when submitted to different deformation rates. Alloys were processed in arc melting, furnace, forged and treated. The samples were machined in accordance with ASTME9-09 standard to carry out compression tests. The influence of deformation was evaluated by optical microscopy and XRD, and Eletrochemical parameters were analyzed in the most severe condition of deformation (22%). Corrosion resistance exhibited the same behavior for two conditions, 22% and without deformation.

show abstract

Mechanical and wear properties of ultrafine-grained pure Ti produced by multi-pass equal-channel angular extrusion

Cited by 123 publications

References 34 publications

The Strength–Grain Size Relationship in Ultrafine-Grained Metals

The Strength–Grain Size Relationship in Ultrafine-Grained Metals

The Effect of Severe Plastic Deformation and Heat Treatment on CuCrZr Alloys

Corrosion Resistance After Mechanical Deformation of the Ti30Ta Experimental Alloy for Using in Biomedical Applications

Contact Info

Product

Resources

About