Title :
Influence of solid-solution treatment on corrosion performance of cast AM50 magnesium alloy
Author :
Yang Miao ; Jin Hongzhe ; Liu Yao Hui ; Song Yulai
Author_Institution :
Key Lab. of Automobile Mater., Jilin Univ., Changchun, China
Abstract :
It was investigated by quenching the AM50 magnesium alloy test samples in water after T4 treating (420°C) for 24 h. Then both kinds of the test bars were immersed in 3.5 wt.% NaCl saturation Mg (OH)2 aqueous solution for 0, 24 and 72 h. Then tensile tests were taken. The microstructure of the samples was analyzed by scanning electronic microscope and X-ray diffraction. The results show that though solid-solution treatment improved the corrosion residual strength of the cast AM50 magnesium alloy for 24h, the deeper corrosion pits developed on the heat-treatment samples on 72h caused more drop of the strength compare to the untreated samples. The solid-solution treatment and the extreme depth theoretical of corrosion pits effect together to the corrosion residual strength.
Keywords :
X-ray diffraction; aluminium alloys; corrosion resistance; cracks; crystal microstructure; heat treatment; magnesium alloys; scanning electron microscopy; stress-strain relations; tensile strength; tensile testing; AM50 magnesium alloy quenching; NaCl saturated Mg(OH)2 aqueous solution; T4 treatment; X-ray diffraction analysi; cast AM50 magnesium alloy; corrosion performance; corrosion pits; corrosion residual strength; heat treated samples; microstructure; scanning electronic microscopy; solid solution treatment effects; temperature 420 degC; tensile test; time 0 hr; time 24 hr; time 72 hr; Bars; Corrosion; Magnesium; Microstructure; Surface morphology; Surface treatment; AM50 magesium alloy; corrosion; corrosion residual strength; solid-solution treatment;
Conference_Titel :
Mechatronic Science, Electric Engineering and Computer (MEC), 2011 International Conference on
Conference_Location :
Jilin
Print_ISBN :
978-1-61284-719-1
DOI :
10.1109/MEC.2011.6025492
