Research Article

Manufacturing of Nanostructured Rings from Previously ECAE-Processed AA5083 Alloy by Isothermal Forging

Table 4

Microhardness for the material samples after the ring isothermal forging.

Position200°C250°C300°C
Central zoneUpper zoneCentral zoneUpper zoneCentral zoneUpper zone

(0,0)131.5124.1109.3107.895.6108.3
(0,1)131.1129.2110.1119.8105.0106.9
(0,2)137.7128.9110.2113.3105.7105.5
(0,3)132.2126.0112.3107.2105.2101.0
(0,4)136.6127.4112.8110.0111.5108.7

Mean133.82127.12110.94111.62104.60106.08
Standard deviation3.092.121.525.165.713.11