Effect of GBCD on IGC susceptibility of solution treated 2024 Al alloy
Grain boundary character distribution(GBCD)of solution heat treated 2024 Al alloy was analyzed by electron backscattered diffraction,and intergranular corrosion(IGC)susceptibility and corrosion weight loss of the 2024 Al were investigated according to ASTM G110-92.The grain boundaries are composed of 12.17%low angle(Σ1)boundaries,10.87%low coincidence site lattice(Σ3-Σ29)boundaries and 76.96%random(R)boundaries.After corrosion for 6 h,the corroded boundary proportions of Σ1,Σ3,Σ5-Σ29 and R boundaries were 10.71%,11.11%,21.95%and 25.14%,respectively.This shows that the GBCD has a great effect on IGC susceptibility of the solution treated 2024 Al,and both Σ1 and Σ3 boundaries exhibit much higher IGC resistance than Σ5-Σ29 and R boundaries.Among all the boundaries,the R boundaries have the highest IGC susceptibility.
G P Li C L He R Li J M Shi G F Ma X Y Fu H Z Chen J M Wang
Liaoning Provincial Key Laboratory of Advanced Materials,Shenyang University,Shenyang 110044,China
国际会议
三亚
英文
1-4
2017-11-18（万方平台首次上网日期，不代表论文的发表时间）