Title of article :
Effect of Cryogenic Treatment on Deformation Behavior of As-cast AZ91 Mg Alloy
Author/Authors :
LIU، نويسنده , , Junwei and Li، نويسنده , , Guifa and CHEN، نويسنده , , Ding and CHEN، نويسنده , , Zhenhua، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Abstract :
The as-cast AZ91 Mg alloy samples were cryogenic treated with different time. Otherwise, optical microscope (OM), mechanical test, resistance test and XRD analysis were used to research the microstructure evolution and physical variation of the samples before and after cryogenic treatment (CT). Due to CT, the structure of as-cast AZ91 Mg alloy was changed from disordered solid solution to ordered solid solution. Firstly, the appearance of ordered solid solution leads to the improvement of peak stress after CT, because of ordered strengthening. Secondly, resistance and crystallographic lattice constant of the samples reduce obviously. Otherwise, the frame-type twinning which is created from matrix in the cryogenic environment could hinder the twin growth and cause the ordered strengthening.
Keywords :
Magnesium alloys , ordered solution , microstructure , Twinning , cryogenic treatment
Journal title :
Chinese Journal of Aeronautics
Journal title :
Chinese Journal of Aeronautics