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为了解IC－6合金在高温氧化环境中的力学损伤行为．研究了900、1000、1100℃空气中预暴露100h后合金的组织变化和拉伸性能．合金在预暴露后强度变化不大。且在不高于1000℃下预暴露后合金拉伸塑性没有受到氧化损伤．与K17G镍基合金相比，IC－6合金所具有的这些明显优势被归因于定向凝固方法消除了横向晶界、抑制了空气中的氧沿晶扩散所造成的高温氧化环境的力学损伤．在1100℃预暴露后．由于在合金表面生成挥发性MoO3，合金基体沿枝晶间严重氧化，合金强度急剧下降．
To understand the mechanical damage behavior of IC-6 alloy in high temperature oxidation environment. The microstructure and tensile properties of the alloy after pre-exposure at 900, 1000 and 1100 ℃ for 100 h were studied. The alloy did not change much in strength after pre-exposure. The tensile plasticity of the alloy after pre-exposure at no higher than 1000 ℃ was not oxidatively damaged. Compared with the K17G Ni-based alloy, these obvious advantages of the IC-6 alloy are attributed to the fact that the directional solidification method eliminates the lateral grain boundaries and suppresses the mechanical damage of the high temperature oxidation environment caused by the diffusion of oxygen in the air. After pre-exposure at 1100 ° C. Due to the formation of volatile MoO3 on the alloy surface, the alloy matrix is severely oxidized along the dendrite, and the strength of the alloy decreases sharply.