Grain boundary films in Al–Zn alloys after high pressure torsion

2014 ◽  
Vol 70 ◽  
pp. 59-62 ◽  
Author(s):  
B.B. Straumal ◽  
X. Sauvage ◽  
B. Baretzky ◽  
A.A. Mazilkin ◽  
R.Z. Valiev
Keyword(s):  
High Pressure ◽  
Grain Boundary ◽  
High Pressure Torsion ◽  
Boundary Films ◽  
Zn Alloys

scholarly journals Influence of Zn content on the microstructure and mechanical performance of ultrafine-grained Al–Zn alloys processed by high-pressure torsion

2017 ◽  
Vol 186 ◽  
pp. 334-337 ◽  
Author(s):  
Nguyen Q. Chinh ◽  
Péter Jenei ◽  
Jenő Gubicza ◽  
Elena V. Bobruk ◽  
Ruslan Z. Valiev ◽  
...  
Keyword(s):  
High Pressure ◽  
Mechanical Performance ◽  
High Pressure Torsion ◽  
Ultrafine Grained ◽  
Zn Content ◽  
Zn Alloys

Grain boundary statistics in nano-structured iron produced by high pressure torsion

2005 ◽  
Vol 390 (1-2) ◽  
pp. 159-165 ◽  
Author(s):  
Yu. Ivanisenko ◽  
R.Z. Valiev ◽  
H.-J. Fecht
Keyword(s):  
High Pressure ◽  
Grain Boundary ◽  
High Pressure Torsion

Characterizing Microstructural and Mechanical Properties of Al–Zn Alloys Processed by High‐Pressure Torsion

2019 ◽  
Vol 22 (1) ◽  
pp. 1900672 ◽  
Author(s):  
Nguyen Q. Chinh ◽  
Péter Szommer ◽  
Jenő Gubicza ◽  
Moustafa El-Tahawy ◽  
Elena V. Bobruk ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
High Pressure Torsion ◽  
Zn Alloys

scholarly journals Grain boundary excess volume and defect annealing of copper after high-pressure torsion

2014 ◽  
Vol 68 ◽  
pp. 189-195 ◽  
Author(s):  
Bernd Oberdorfer ◽  
Daria Setman ◽  
Eva-Maria Steyskal ◽  
Anton Hohenwarter ◽  
Wolfgang Sprengel ◽  
...  
Keyword(s):  
High Pressure ◽  
Grain Boundary ◽  
Excess Volume ◽  
High Pressure Torsion ◽  
Defect Annealing

The State of Grain Boundaries and Grain-Boundary Diffusion in Ultrafine-Grained Mo Obtained by Severe Plastic Deformation

2016 ◽  
Vol 367 ◽  
pp. 130-139 ◽  
Author(s):  
Vladimir V. Popov ◽  
A.V. Sergeev
Keyword(s):  
Plastic Deformation ◽  
High Pressure ◽  
Grain Boundary ◽  
Severe Plastic Deformation ◽  
Grain Boundaries ◽  
Boundary Diffusion ◽  
High Pressure Torsion ◽  
Grain Boundary Diffusion ◽  
Fast Diffusion ◽  
Non Equilibrium

The grain-boundary diffusion of Co in ultra-fine grained Mo processed by high-pressure torsion has been studied by emission Mössbauer spectroscopy and radio-tracer analysis. It is demonstrated that under the severe plastic deformation by high-pressure torsion the non-equilibrium grain boundaries are formed which are the ultra-fast diffusion paths. At annealing in the temperature range of 623-823 K the relaxation of the non-equilibrium boundaries proceeds and their properties approach to those of equilibrium boundaries of recrystallization origin.

scholarly journals Effect of Post-annealing on Grain Boundary of Nano-crystalline Cu Processed by Powder High-Pressure Torsion

2014 ◽  
Vol 45 (11) ◽  
pp. 4748-4752 ◽  
Author(s):  
Eun Yoo Yoon ◽  
Dong Jun Lee ◽  
Lee Ju Park ◽  
Sunghak Lee ◽  
Mohamed Ibrahim Abd El Aal ◽  
...  
Keyword(s):  
High Pressure ◽  
Grain Boundary ◽  
High Pressure Torsion ◽  
Post Annealing ◽  
Nano Crystalline

Grain Boundary Structure and Deformation Defects in Nanostructured Al–Mg Alloys Processed by High Pressure Torsion

2008 ◽  
Vol 584-586 ◽  
pp. 528-534 ◽  
Author(s):  
M. Liu ◽  
Hans Jørgen Roven ◽  
Tamás Ungár ◽  
L. Balogh ◽  
Maxim Yu. Murashkin ◽  
...  
Keyword(s):  
High Pressure ◽  
Grain Boundary ◽  
Line Profile ◽  
High Pressure Torsion ◽  
Boundary Structure ◽  
X Ray ◽  
Grain Boundary Structure ◽  
Average Grain Size ◽  
Deformation Defects ◽  
Non Equilibrium

An Al–0.5 Mg alloy and a commercial AA5182 alloy were subjected to high pressure torsion (HPT) to five turns under pressure of 6 GPa at room temperature. The grain boundary structure and deformation defects were investigated after HPT using high-resolution transmission electron microscopy (HRTEM). Low-angle, high-angle, equilibrium and non-equilibrium grain/subgrain boundaries, twin boundaries, full dislocations, dipoles, microtwins and stacking faults were identified by HRTEM. Extrinsic 60° dislocations in the form of dipoles were frequently observed in non-equilibrium grain/subgrain boundaries. In addition subgrain size distributions and dislocation densities were quantified by x-ray line profile analysis. It was observed that the average grain size decreased from about 120 nm to 55 nm as the Mg content increased from 0.5 to 4.1 wt%. Concomitantly the average stored dislocation density increased from 1.7 to 12.8  1014 m-2. Based on the HRTEM investigations and the x-ray line profile analyses, the deformation mechanism associated with the typical grain boundaries and deformation defects in the aluminium alloys were discussed.

Structural and hardness inhomogeneities in Mg–Al–Zn alloys processed by high-pressure torsion

2013 ◽  
Vol 48 (13) ◽  
pp. 4661-4670 ◽  
Author(s):  
Ahmed Al-Zubaydi ◽  
Roberto B. Figueiredo ◽  
Yi Huang ◽  
Terence G. Langdon
Keyword(s):  
High Pressure ◽  
High Pressure Torsion ◽  
Zn Alloys
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