Improved quench sensitivity in modified aluminum alloy 7175 for thick forging applications

Predicting the quench sensitivity of Al–Zn–Mg–Cu alloys: A model for linear cooling and strengthening

“…It is noted that duplex ageing or slow heating to the ageing temperature can recover some of the hardness/strength losses of Al-Zn-Mg based alloys that are quenched at rates that reduce the aged yield strength by about 20 to 60 % when a single stage artificial ageing treatment is used [22,106,107].…”

Mechanism of low exfoliation corrosion resistance due to slow quenching in high strength aluminium alloy

“…So the mechanism of low corrosion resistance of the alloys with a high Cu concentration due to slow quenching still needs to be explored. This problem is very important for very thick plates or heavy forgings, because quench rate in the center layer in these products is often low due to the large section or requirement of controlling residual stress [35,36]. 7055 aluminium alloy is a typical Al-Zn-Mg-Cu alloy with a high Cu concentration from 2.0 to 2.6 (wt.%).…”

Effect of microstructure on the quench sensitivity of AlZnMgCu alloys

“…Therefore, it is desirable to decrease the quench sensitivity. Many investigations have been performed on quench sensitivity of AlZnMgCu alloys due to their practical importance [3][4][5][6][7][8][9][10][11].…”

“…For instance, higher amount of alloying elements often gives rise to higher quench sensitivity [3,4], and adjustment of Zn:Mg ratio may decrease quench sensitivity [4,5]. As for microstructure, it has been found that quench sensitivity is associated with nucleation sites, e.g.…”