EBSD analysis of nano-structured copper processed by ECAP

Salimyanfard, Farideh; Toroghinejad, Mohammad Reza; Ashrafizadeh, F.; Jafari, Meysam

doi:10.1016/j.msea.2011.03.075

Cited by 69 publications

(30 citation statements)

References 20 publications

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“…The excess of low-angle boundaries visible in Fig. 5 is a consistent feature that has been reported in many UFG materials after processing by ECAP [17,22,[40][41][42] and HPT [22,26,41,[43][44][45][46] and it arises directly from measuring the pixel-to-pixel variation [36,37]. passes showing a general homogeneity which is consistent with hardness measurements taken on materials processed by ECAP on both the cross-sectional and longitudinal planes [47][48][49].…”

Section: Evolution Of the Microstructure After Ecap Processingsupporting

confidence: 86%

“…There are numerous reports documenting the effect of SPD processing on materials such as pure copper [12][13][14][15][16][17][18][19][20] and pure nickel [21][22][23] but less information is currently available for alloys of these materials. At the present time, limited reports are available describing the SPD processing of various Cu-Ni-Si alloys.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microstructure and texture evolution in a Cu–Ni–Si alloy processed by equal-channel angular pressing

Larbi

Azzeddine

Baudin

et al. 2015

Journal of Alloys and Compounds

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Section: Evolution Of the Microstructure After Ecap Processingsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Microstructure and texture evolution in a Cu–Ni–Si alloy processed by equal-channel angular pressing

Larbi

Azzeddine

Baudin

et al. 2015

Journal of Alloys and Compounds

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“…This phenomenon has been observed for UFG copper [44] and also for other severely deformed metals, such as aluminum [45]. The flow stress quickly reaches a maximum value and then decreases gradually, and so, the total elongation is reduced as well.…”

Section: Mechanical Propertiesmentioning

confidence: 57%

The influence of an ECAP-based deformation process on the microstructure and properties of electrolytic tough pitch copper

2017

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Samples of electrolytic tough pitch copper were deformed in equal channel angular pressing with enhanced productivity to quickly refine its initial coarsegrained microstructure at room temperature. The evolution in microstructure and changes in a broad range of properties were compared to a sample in the undeformed state. The microstructure evolution was evaluated using electron backscatter diffraction for both states and transmission electron microscopy for a detailed microstructure characterization of the deformed sample. The microstructure observations were correlated with the results of tensile tests, electrochemical tests in 3.5 wt% NaCl, electrical conductivity measurements and thermal stability up to 200°C. The ECAP process employed in this study caused a grain refinement from about 16 µm to about 600 nm. The microstructure refinement caused a 50% increase in both the YS and UTS. The elongation to failure, due to the high amount of LAGBs, maintained a high value of 13.3%. The corrosion and pitting potentials were higher for the deformed sample. Furthermore, the grain refinement caused a decrease in electrical conductivity from 100.2% IACS to 93.1% IACS, a drop of 7% IACS. The deformed sample displayed thermal stability up to a temperature of 175°C, where there was a drop in micro-hardness of more than 10%.

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“…The saturation is may be because of the saturation of the grain size. This saturation behavior has also seen in ECAP-processed copper, [30] Ni, [35] Ti, [36] and magnesium alloy [13] and TCAP-processed pure Al. [18] Some researchers reported that the increase in the strain reduces the dislocation density in the grain interiors of a 1050-Al alloy.…”

Section: Resultsmentioning

confidence: 56%

“…Recrystallized grains in FCC metals, because of the large deformations at room temperatures, have been reported by some researchers. [30,31] Results from optical microscopy analysis of four pass ECAP-processed Al-6061 samples showed that most of the elongated grains became uniformly distributed, [32] which is inconsistent with two passes PTCAP-processed sample microstructure shown in Figure 4(a).…”

Section: Resultsmentioning

confidence: 83%

Microstructure and Mechanical Properties of Ultra-fine-Grained Al-Mg-Si Tubes Produced by Parallel Tubular Channel Angular Pressing Process

Faraji

Roostae

Nosrati

et al. 2015

Metall Mater Trans A

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In the present work, commercial Al-6061 alloy tubes were processed via multi-pass parallel tubular channel angular pressing (PTCAP). The effects of the number of passes on grain refinement and mechanical properties were investigated. The microstructural evolution was characterized using electron back-scattered diffraction (EBSD) and scanning electron microscopy. The mechanical properties were evaluated using tensile tests and hardness measurements. The EBSD analyses presented that the elongated subgrains or grains with~800 nm in size and a high fraction of low-angle grain boundaries were formed after two PTCAP passes. After four passes, the elongated subgrains have transformed to almost equiaxed grains with~400 nm in size and high-angle grain boundaries. Microhardness of the processed tube increased from 38.9 to 63.4 HV (~63 pct) after three PTCAP passes. An increase in the number of PTCAP passes after three passes has no more effect on the microhardness. Yield and ultimate tensile strength were increased by 2.1 and 1.6 times, respectively, after four PTCAP passes (e~6.4) compared to the annealed sample. Ductile fracture with an extensive necking zone and many big dimples occur in the annealed sample, while fine dimples and limited ductile fracture features were observed in the ultra-fine grained PTCAP-processed samples.

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EBSD analysis of nano-structured copper processed by ECAP

Cited by 69 publications

References 20 publications

Microstructure and texture evolution in a Cu–Ni–Si alloy processed by equal-channel angular pressing

Microstructure and texture evolution in a Cu–Ni–Si alloy processed by equal-channel angular pressing

The influence of an ECAP-based deformation process on the microstructure and properties of electrolytic tough pitch copper

Microstructure and Mechanical Properties of Ultra-fine-Grained Al-Mg-Si Tubes Produced by Parallel Tubular Channel Angular Pressing Process

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