Microstructure evolution of an artificially aged Al-Zn-Mg-Cu alloy subjected to soft- and hard-steel core projectiles

Journal of Materials Research and Technology

Ghulam Yasin¹  Faisal Nazeer²  Huanwu Cheng²  Mohamed A. Afifi³  Waheed Qamar khan⁴  Yangwei Wang⁴  Muhammad Abubaker Khan⁴  Abdul Malik⁴  Muhammad Kamran⁴  Tahir Ahmad⁵ 

[1] Corresponding author.;National Key Laboratory of Science and Technology on Materials under Shock and Impact, Beijing, 100081, China;College of Engineering and Emerging Technology, University of Punjab, Lahore, Pakistan;School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;State Key Laboratory of Chemical Resource Engineering, School of Material Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China;

关键词: Al-Zn-Mg alloy;    Perforation channel;    Hard steel projectile;    Soft steel projectile;    Precipitates;    ASBs;   

DOI  :  

来源: DOAJ

【 摘 要 】

An investigation was conducted to study the effect of soft (220 Hv) and hard (750 Hv) steel projectiles on an Al-Zn-Mg-Cu alloy processed by hot extrusion followed by heat treatment (solid solution treatment at 743 K/1.5 h + ageing treatment at 388 K/24 h). The results show that the hardness of the projectile material can influence on the shape and size of the perforation channel formed after the penetration. The hard steel projectile has longer depth of penetration and the crater front diameter is narrower comparing with the Al alloy after penetration by the soft steel projectile. Adiabatic shear bands (ASBs) are formed in the perforation channel after penetration with presence of recrystallized grains within these bands. The ASBs are wider after the hard steel projectile penetration with presence of cracks comparing with the ASBs formed after the soft steel projectile penetration. Precipitates are increased in size and overlapped in the perforation channel which are mainly of G.P. zone and η' precipitates. Hardness values of the Al alloy after penetration increase in the upper side of the perforation channel over the middle and end regions of the channel.

【 授权许可】

Unknown