J. Mater. Sci. Technol. ›› 2016, Vol. 32 ›› Issue (8): 774-782.DOI: 10.1016/j.jmst.2016.06.004
• Orginal Article • Previous Articles Next Articles
Hidalgo-Manrique P.(),Orozco-Caballero A.,Cepeda-Jiménez C.M.,Ruano O.A.,Carreño F.
Received:
2015-07-08
Accepted:
2015-11-13
Online:
2016-08-10
Published:
2016-10-11
Contact:
Hidalgo-Manrique P.,Orozco-Caballero A.,Cepeda-Jiménez C.M.
Hidalgo-Manrique P.,Orozco-Caballero A.,Cepeda-Jiménez C.M.,Ruano O.A.,Carreño F.. Influence of the Accumulative Roll Bonding Process Severity on the Microstructure and Superplastic Behaviour of 7075 Al Alloy[J]. J. Mater. Sci. Technol., 2016, 32(8): 774-782.
Fig. 1. TEM micrographs showing the evolution of the microstructure during ARB at 350?°C. The processing conditions are given in each micrograph, being ordered by number of passes and thickness reduction per pass.
Fig. 3. EBSD orientation maps of the ARBed samples processed (a) up to 5 passes by 2:1 reductions per pass and (b) up to 3 passes by 3:1 reductions per pass. The mean boundary misorientation angle (θ) and the fraction of high angle boundaries (fHAB) of each sample have been included as an inset. Details for the figure are given in the text.
Fig. 4. ODFs showing the evolution of the texture during ARB at 350?°C. The processing conditions are given in each micrograph, being ordered by number of passes and thickness reduction per pass. The black points denote the ideal positions of cube (C) orientation.
Fig. 5. True stress (σ)-true strain (ε) curves corresponding to tensile tests at 10-2?s-1 performed on the as-received material and the ARBed samples processed at (a) Rp?=?2:1 and (b) Rp?=?3:1.
Fig. 6. Elongation to failure (eF) at 10-2?s-1 as a function of the testing temperature for the as-received material and the ARBed samples processed at (a) Rp?=?2:1 and (b) Rp?=?3:1.
Fig. 7. Dependence of the true strain rate ( ε ? ) on the true stress (σ) for the as-received material and for the ARBed samples processed at (a) Rp?=?2:1 and (b) Rp?=?3:1 for different testing temperatures.
Fig. 8. Apparent stress exponent at 10-2?s-1 ( n ap 10 - 2 ) as a function of the testing temperature for the as-received material and the ARBed samples processed at (a) Rp?=?2:1 and (b) Rp?=?3:1.
Fig. 9. SEM micrograph showing the gauge section surface of the 3p-3:1 sample after testing at 300?°C at an initial strain rate of 10-2?s-1. Tensile axis is horizontal.
Fig. 10. SEM micrographs showing the gauge section surface of (a) the 5p-2:1 sample and (b) the 3p-3:1 sample after testing at 300?°C at an initial strain rate of 10-2?s-1. Tensile axis is horizontal.
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