Evolution of microstructure and strengthening of 7050 Al alloy by ECAP combined with heat-treatment

Development of ultrafine grained Al–Mg–Si alloy with enhanced strength and ductility

“…As compared to the T6 treatment [13], the YS, UTS and ductility of the CR materials with the peak HT condition have increased from 214 MPa to 265 MPa, 241 MPa to 286 MPa and 11 to 14 respectively. According to the literature [14][15][16], pre-ECAP solid solution treatment combined with post-ECAP ageing of Al alloys exhibited a significant improvement in strength with sacrificing the ductility. However, in the present work, the CR 6063 Al alloy with peak HT condition shows a large enhancement of both strength and ductility.…”

Effect of ageing on microstructure and mechanical properties of bulk, cryorolled, and room temperature rolled Al 7075 alloy

“…Recently, a lot of research activities are focused to improve the strength and ductility of severely deformed age hardenable Al alloys [2,[24][25][26][27][28][29][30][31][32][33]. The effect of post-ECAP low-temperature ageing on the tensile behavior of an Al 10.8 wt pct Ag alloy was studied by Horita et al [24].…”

“…Kim et al [25] investigated the effect of low temperature ageing on strength and ductility of an ECAP-processed Al 2024 alloy and found that the yield strength improved to ∼630 MPa while maintaining a reasonable elongation to failure (∼15 pct). Zheng et al [26,27] studied the effect of ageing on the strength of the ECAP processed Al 7050 alloy and identified that the pre-ECAP solid solution treatment combined with the post-ECAP low-temperature ageing process has significantly improved its strength. Kim et al [28] have studied the influence of ageing on ECAP processed Al 7075 alloy containing Sc (7 × 51) and reported a significant enhancement of strength properties after subjecting it to proper ageing treatment.…”

Predicting the critical pre-aging time in ECAP processing of age-hardenable aluminum alloys

“…So, segmentation or cracking of the material is expected. These problems may be avoided by increasing the processing temperature [4][5][6][7][8][9][10][11][12]. However an increase in the pressing temperature leads to a larger grain size and also enhances additional precipitation, and may lead to overaging of the material.…”