Effect of non-isothermal aging on microstructure and corrosion behaviors of multilayered friction surfaced Al-Mg-Si alloy with Ag additive

作     者：Hamed JAMSHIDI AVAL 

作者机构：Department of Materials Engineering， Babol Noshirvani University of Technology， Shariati Avenue 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报(英文版))

年 卷 期：2022年

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

摘      要：In this study， the influence of non-isothermal aging on the microstructure and corrosion behavior of multilayer friction surfaced Al-Mg-Si alloy with different amounts of silver additive was investigated. The silver in 4， 8， and 13 weight percentages is inserted into the consumable rods by drilling holes in the cross section of the consumable rods. The coating microstructure was studied using light and electron microscopy， the mechanical properties of coatings were studied using microhardness and tensile tests， and the corrosion resistance of samples was studied using electrochemical testing. The results show that the grain size of friction surfaced layers decreases from 1.5 ± 0.3 to 1.0 ± 0. 3 μm with increasing the percentage of silver additive from 4 to 13 wt.%. The solute silver in the aluminum matrix increases the precipitation kinetics in the Al-Mg-Si alloy. After non-isothermal aging， the yield and tensile strength in the silver containing coating are 50.6 and 43.5% higher than the silver-free coating， respectively. Non-isothermal aging treatment reduces corrosion current density and increases corrosion resistance in both samples with and without silver additive. The corrosion resistance of the silver-containing coating is 96.5% higher after non-isothermal aging than the silver-free coating.