Effect of Cu, Zn, and Mg Concentration on Heat Treating Behavior of Squeeze Cast Al-(10 to 12)Zn-(3.0 to 3.4)Mg-(0.8 to 1)Cu

Metals

J.B. Ferguson¹  Benjamin F. Schultz²  John C. Mantas¹  Hassan Shokouhi¹ 

[1] Materials Science and Engineering Department, University of Wisconsin-Milwaukee, 3200 N. Cramer St. Milwaukee, WI 53211, USA;

关键词: Al-Zn-Mg-Cu alloys;    mechanical properties;    heat treatment;   

DOI  :  10.3390/met4030314

来源: mdpi

【 摘 要 】

Aluminum Alloy AA-7034 is a high strength wrought alloy with reasonable ductility containing 10–12 wt% Zn, 2–3 wt% Mg, and 0.8–1.2 wt% Cu. This work investigates the effect of varying the concentration of Zn (10–12 wt%) and Cu (0.8–1 wt%) on the solutionizing and aging behavior of squeeze cast AA-7034 samples. The same behaviors were investigated when Mg content was increased beyond 3 wt%. The solutionizing heat treatment dissolved much of the macroscopic second phases present in the as-cast AA-7034 alloys, but a significant amount of second phases remain after solutionizing in alloys with >3 wt% Mg. The behaviors of the various Al-Zn-Mg-Cu alloys are compared to squeeze cast Al-A206 casting alloy heat-treated to the T7 condition. All Al-Zn-Mg-Cu alloys obtained higher hardness values than those obtained by Al-A206-T7.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.