Strain Mapping and Nanocrystallite Size Determination by Neutron Diffraction in an Aluminum Alloy (AA5083) Severely Plastically Deformed through Equal Channel Angular Pressing

Table 1

Average values of cell parameters, macrostrain (𝑒_𝑖), lattice strains (l.s.), and crystallite sizes corresponding to reflection (311). The crystallite size of blank specimen, from SEM micrographs, can be estimated to be around 200 nm.

	𝑎 (±0.0001)	𝑒𝑖×10^4	l.s. (Γ𝑠)	Xtal size (nm)
Blank	4.0344	—	—	2×10^5
2A	4.0339	−1.2	—	—
2C	4.0334	−2.5	—	—
3A	4.0334	−2.5	—	—
3C	4.0333	−2.7	—	—
4A	4.0331	−3.2	0.24	—
4C	4.0333	−2.7	0.25	—
4A ann.	4.0337	−1.7	—	89
4C ann.	4.0340	−1.0	—	115