利用力学测试与模拟试验机测得了IC10合金在很宽的温度范围(25~900℃)和不同应变速率(10-5~10-2 s-1)下的应力-应变曲线,对曲线进行了分析;用扫描电子显微镜对试样的断口进行了分析.结果表明:室温下IC10合金的流变应力对应变速率不太敏感,而在900℃下对应变速率非常敏感;比较各温度下材料的屈服强度可以发现,当温度低于(含)800℃时,IC10合金的力学性能与室温下相当,而在更高的温度(900℃)下力学性能有所下降;在低于(含)800℃时断口主要以穿晶断裂为主,在900℃下主要为韧窝聚集型断裂,随着温度的增加,断口上韧窝更大、更深、更多.

The tensile experiments were conduct over a wide range of temperatures (25-900℃) and strain rates (10-5-10-2 s-1) on a material testing system to investigate the flow behaviors of alloy IC10.The anomalous temperature dependence of yield stress was also investigated.The characters of fractures at different temperatures were studied with the aid of scanning electron microscopy.The stress-strain curves revealsed that the flow behaviors were sensitive to strain rates at 900℃,but not at room temperature.When the temperature was below (including) 800℃,the fracture was transgranular cracking mixed with a few dimpled and intergranular fracture.The fracture was ductile cracking at 900℃.A close comparison among the fractures under various conditions revealed that the number of the ductile dimples increased with the temperature,and the dimples at evaluated temperature were deeper and larger.