THE EFFECT OF CARBON CONTAINING ATMOSPHERE ON THE STRUCTURE AND MECHANICAL PROPERTIES OF FE-32MN-9.4AL-1C-1.27SI ALLOY

摘要

The effect of a carbon containing atmosphere on the microstructure and mechanical properties of Fe-32Mn-9.4Al-1C-1.27Si alloy was investigated in this work. Surface oxide nodules and grain boundary oxides were found to form on this alloy when it was annealed in carbon-containing air at 1050 degrees C for 1 h. The oxidation reaction was thought to be the result of the ''green rot'' attack process. This alloy was embrittled severely by the carbon-containing air through the formation of surface oxide nodules and grain boundary oxide. The carbon-containing air enhanced the oxidation rate of this alloy at 1050 degrees C. The structure of the oxide nodules formed on this alloy in the carbon-containing air was similar to that observed on a FeMnAl alloy heated in 1000 degrees C air for 24 h. [References: 28]