Microstructures and properties of copper processed by equal channel angular extrusion for 1–16 passes

Torre, F. Dalla; Lapovok, Rimma; Sandlin, James David; Thomson, Peter Frederic; Davies, Chris; Pereloma, EV

doi:10.1016/j.actamat.2004.06.040

Cited by 555 publications

(229 citation statements)

References 25 publications

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“…Despite the majority of the literature data does not discuss the created grain/subgrain separately but rather give the overall values, it should be stated that the obtained are comparable with the literature data [Dobatkin, 2007;Dalla Torre, 2004].…”

Section: The Absolute Deformationsupporting

confidence: 70%

See 1 more Smart Citation

The Effect of Strain Path on the Microstructure and Mechanical Properties in Cu Processed by COT Method

Rodak¹

2012

Recrystallization

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Section: The Absolute Deformationsupporting

confidence: 70%

“…The literature also tells about the decrease of the dislocation density after obtaining large deformations [Dalla Torre, 2004].…”

Section: The Absolute Deformationmentioning

confidence: 99%

The Effect of Strain Path on the Microstructure and Mechanical Properties in Cu Processed by COT Method

Rodak¹

2012

Recrystallization

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“…The size and size-distribution of crystallites, grains, or subgrains, and the dislocation structure were studied intensively in different metals and alloys, e.g. Al [69], Al-alloys [69][70][71], Cu [72][73][74][75][76][77][78], or Ni [79][80][81], processed by SPD procedures at room temperature, e.g. by equal channel angular pressing (ECAP) or high pressure torsion (HPT).…”

Section: 5mentioning

confidence: 99%

Nanocrystalline materials studied by powder diffraction line profile analysis

Ungár¹,

Gubicza²

2007

Zeitschrift Für Kristallographie - Crystalline Materials

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Abstract. X-ray powder diffraction is a powerful tool for characterising the microstructure of crystalline materials in terms of size and strain. It is widely applied for nanocrystalline materials, especially since other methods, in particular electron microscopy is, on the one hand tedious and time consuming, on the other hand, due to the often metastable states of nanomaterials it might change their microstructures. It is attempted to overview the applications of microstructure characterization by powder diffraction on nanocrystalline metals, alloys, ceramics and carbon base materials. Whenever opportunity is given, the data provided by the X-ray method are compared and discussed together with results of electron microscopy. Since the topic is vast we do not try to cover the entire field.

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“…It is feasible to repeat the pressing several times to achieve a large degree of strain and thereby, to refine the grain size to a submicrometer or even nanometer level. The nanostructured materials produced by ECAP have a very high strength due to their low grain size (and therefore large number of grain boundaries) and high amount of defects, such as vacancies, dislocations and staking faults [5][6][7][8][9]. Because most structural transformations and mechanical properties are associated with the vacancies, dislocations, stacking faults and grain boundaries, a precise quantification of such defects in ultrafine grains alloys seems necessary for better understanding and control of the final properties.…”

Section: Introductionmentioning

confidence: 99%

Structure and microstructure evolution of Al–Mg–Si alloy processed by equal-channel angular pressing

Khelfa

Rekik

Khitouni

et al. 2017

Int J Adv Manuf Technol

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An ultrafine grained Al-Mg-Si alloy was prepared by severe plastic deformation using the Equal Channel Angular Pressing (ECAP) method. Samples were ECAPed through a die with an inner angle of Φ=90º and outer arc of curvature of ψ= 37° from 1 to 12 ECAP passes at room temperature following route Bc. To analyze the evolution of the microstructure at increasing ECAP passes x-ray diffraction and Electron Backscatter Diffraction analyses were carried out. The results revealed two distinct processing regimes, namely: i) from 1 to 5 passes, the microstructure evolved from elongated grains and sub-grains to a rather equiaxed array of ultrafine grains and ii) from 5 to 12 passes where no change in the morphology and average grain size was noticed. In the overall behavior, the boundary misorientation angle and the fraction of high-angle boundaries increase rapidly up to 5 passes and at a lower rate from 5 to 12 passes. The crystallite size decreased down to about 45 nm with the increase in deformation. The influence of deformation on precipitate evolution in the Al-Mg-Si alloy was also studied by differential scanning calorimetry. A significant decrease in the peak temperature associated to the 50% of recrystallization was observed at increasing ECAP passes.

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Microstructures and properties of copper processed by equal channel angular extrusion for 1–16 passes

Cited by 555 publications

References 25 publications

The Effect of Strain Path on the Microstructure and Mechanical Properties in Cu Processed by COT Method

The Effect of Strain Path on the Microstructure and Mechanical Properties in Cu Processed by COT Method

Nanocrystalline materials studied by powder diffraction line profile analysis

Structure and microstructure evolution of Al–Mg–Si alloy processed by equal-channel angular pressing

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