Study On The Cyclic Oxidation Resistance Of The Siliconized TiAl-Based Alloy

TiAl-based alloys have attracted much scientific research interest as ideal candidate materials for high temperature structural applications due to their low density, high specific strength, high specific stiffness and high temperature strength ratio. The problem of poor ductility of these materials at room temperature has been mostly solved by alloying and microstructure controlling. However, the insufficient oxidation resistance limits their applicable temperature, which also seriously reduces their mechanical properties. Thus the potential properties of TiAl-based alloys could be displayed to some extent in the application if their high temperature oxidation resistance can be further improved. Pack siliconizing is one of convenient and effective methods in improving the oxidation resistance.The microstructure of the siliconized TiAl-based alloys and the properties at the interaction between stress-strain and high-temperature oxidation have been studied in this paper. The results are as follows.1, The cyclic oxidation resistance of TiAl-based alloy was effectively...