Al-Zn-Mg alloys.

Hydrogen behavior in tensile-deformed Al-Zn-Mg alloy and Al-Mg alloy

“…In a peak-aged AlZn-Mg alloy, precipitation free zones (PFZs) exist along grain boundaries. The PFZs deform more easily than the interior of the grains (11). It is suggested that hydrogen atoms are easily transported by dislocations in PFZ at the beginning of deformation.…”

“…The specimens were heat-treated as follows: Al-Zn-Mg alloy was solutiontreated at 470°C for 1h, water-quenched and then aged at 120°C for 24h, the microstructure of which is presumed to consist of G.P. zones and /or η' (MgZn2) precipitates beside the aluminium matrix (11). Al-Mg alloy was solution-treated at 500°C for 10min and then water-quenched, which will cause a microstructure composed only of the matrix with Mg in solution.…”

Thermodynamic properties prediction of Mg-Al-Zn melts based on the atom and molecule coexistence theory

“…As the similar regressing process of Mg-Al [16,17] and Al-Ti [15,18], the primary regression of at four studied temperatures can be obtained with the measured activities of Mg and Zn from the references [8][9][10][11]23] and substituted into Eq. (13). In order to convince researchers, however, the primary at four temperatures from Eq.…”

“…Since the various applications of Mg-Al-Zn, previous researchers had directed tremendous attention to the Mg-Al-Zn system, especially to the thermodynamic behavior of the molten system. During the investigation of thermodynamic properties in liquid Mg-Al-Zn ternary system including Mg-Al [3][4][5][6], Mg-Zn [8][9][10] and Al-Zn [11][12][13] subsystems, some thermodynamic models and empirical formulas, listed in Table 1, were established and introduced to describe thermodynamic reaction abilities. Nevertheless, one of the potential problems for thermodynamic models is that the artificial parameters are employed in prediction formulas, triggering controversial results in the prediction models, so that the above mentioned prediction models may not work well.…”

Effects of Sc and Zr Addition on the Mechanical Properties of 7000 Series Aluminum Alloys

“…When Zr is added to the 7000 series aluminum alloys, Al 3 Zr particles form and prevent recrystallization during hot working. 1) Scandium also has the same effect of the preventing recrystallization. Fine Al 3 Sc particles are precipitated, and have the effect of preventing recrystallization.…”