Tensile Properties of 450℃ Aged State 3J21 Alloy at Room Temperature Under Atmospheric Conditions

The tensile properties of 3J21 alloy was studied at 450℃ aged state on a universal tensile test machine at room temperature under atmospheric conditions.Moreover,a metallographic microscope was used to analyze the metallographic structure and physical phase of the alloy at 450℃ aged state,a tensile fracture was observed by the scanning electron microscope.The results show that the tensile strength and yield strength of 3J21 alloy at 450℃ aged state is higher and its elongation rate is lower at room temperature under atmospheric conditons.The tensile fracture of 3J21 alloy is a dimple fracture at 450℃ aged state.The distance between the slip lines is larger in the microstructure near the fracture of the alloy at 450℃ aged state.The influence of 450℃ aged state on the tensile properties of 3J21 alloy was discussed at room temperature under atmospheric condition.