Effect of pressing temperature on fine-grained structure formation in 7475 aluminum alloy during ECAP

Partial Grain Refinement in Al-3%Cu Alloy during ECAP at Elevated Temperatures

“…1) Several SPD techniques such as equal channel angular pressing (ECAP), [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] torsion under high pressure 1,3,21) and multi-directional forging (MDF) [22][23][24][25][26][27][28] are now available for attaining of the UFG structures in numerous metals and alloys. There are several reports to date dealt with the investigation of the fine-grained structure evolution in Al alloys at different temperatures during SPD.…”

“…There are several reports to date dealt with the investigation of the fine-grained structure evolution in Al alloys at different temperatures during SPD. [2][3][4]6,8,9,[11][12][13][14]16,[18][19][20][21][22][24][25][26] Under severe plastic deformation conditions, fragmentation of original grains takes place at medium strains followed by in-situ formation of fine crystallites at high strains, which is sometimes called as continuous dynamic recrystallization (CDRX). 9,16,[18][19][20]22,24,25) Such structural changes in Al alloys during SPD are mostly investigated at ambient temperature and only few studies address high-temperature SPD and UFG formation at elevated temperatures.…”

“…9,16,[18][19][20]22,24,25) Such structural changes in Al alloys during SPD are mostly investigated at ambient temperature and only few studies address high-temperature SPD and UFG formation at elevated temperatures. 6,[8][9][10]12,13,16,[18][19][20][24][25][26] The present authors have investigated the microstructural evolution in Al alloys during hot SPD in the recent works. 9,12,16,[18][19][20]24,25) Multi-component commercial-based Al alloys were used for these investigations, because both thermally stable dispersion particles and soluble precipitations coexist in a wide temperature range.…”

“…6,[8][9][10]12,13,16,[18][19][20][24][25][26] The present authors have investigated the microstructural evolution in Al alloys during hot SPD in the recent works. 9,12,16,[18][19][20]24,25) Multi-component commercial-based Al alloys were used for these investigations, because both thermally stable dispersion particles and soluble precipitations coexist in a wide temperature range. It has been shown that the deformation microstructures having high density of dislocations can be easily developed and kept in such alloys due to a pinning effect of the particles.…”

Influence of Severe Plastic Deformation on Precipitation Hardening in an Al-Mg-Si Alloy: Microstructure and Mechanical Properties

“…Recently, age-hardening aluminum alloys have gradually drawn more attention. [13][14][15][16][17] Alloys having UFG structure or nanostructure (NS) usually have high strength but disappointingly low ductility. Zhao et al 18) have recently demonstrated that it is possible to simultaneously increase the ductility and strength of a nanostructured 7075 Al alloy by incorporating very small precipitates into the nanostructured aluminum matrix.…”