A specifically designed test was realized in order to analyze precipitation phenomena during the hot plastic deformation and the subsequent heat treatment of an AA 6060 alloy. An inverse extrusion equipment was designed in order to obtain specimens with a strain gradient inside each sample: the tests were realized at two different initial conditions of homogenization (industrial homogenization and laboratory homogenization) and at 4 different forming temperatures (250°, 350°, 450°, and 550°C). The specimens were then solution soaked and aged . The specimens were analyzed by optical microscopy at the end of the different phases of the process cycle: homogenization, hot forming and heat treatment. Quantitative information on precipitation were obtained by means of image analysis of the samples in several locations and the appearance of particles and intermetallics was recorded (in area and shape) and linked to the processing conditions. Finally, the data were analyzed and discussed in order to provide reliable informations for optimum product quality in term of fine precipitation of particles and intermetallics.
L. Donati, L. Tomesani (2008). Evolution of particles and Intermetallics during hot plastic deformation of AA6060 alloys. MANAMA : Yilbas.
Evolution of particles and Intermetallics during hot plastic deformation of AA6060 alloys
DONATI, LORENZO;TOMESANI, LUCA
2008
Abstract
A specifically designed test was realized in order to analyze precipitation phenomena during the hot plastic deformation and the subsequent heat treatment of an AA 6060 alloy. An inverse extrusion equipment was designed in order to obtain specimens with a strain gradient inside each sample: the tests were realized at two different initial conditions of homogenization (industrial homogenization and laboratory homogenization) and at 4 different forming temperatures (250°, 350°, 450°, and 550°C). The specimens were then solution soaked and aged . The specimens were analyzed by optical microscopy at the end of the different phases of the process cycle: homogenization, hot forming and heat treatment. Quantitative information on precipitation were obtained by means of image analysis of the samples in several locations and the appearance of particles and intermetallics was recorded (in area and shape) and linked to the processing conditions. Finally, the data were analyzed and discussed in order to provide reliable informations for optimum product quality in term of fine precipitation of particles and intermetallics.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
