静液挤压93W合金变形与断裂研究

Study on the Microstructure, Mechanical Properties, Deformation and Fracture Mechanism of 93 W Alloy Deformed by Hydrostatic Extrusion

对静液挤压93W合金的微观组织、力学性能、变形与断裂特征进行了分析研究。结果表明：钨合金的强度随挤压变形量的增大而增加,其增加的幅度随挤压变形量的增大而减小,而延伸率则随挤压变形量的增大而减小；变形起始于粘结相,合金的变形属于典型的双相协调变形：裂纹萌生于钨-钨界面之间：静液挤压态钨合金的拉伸断口上钨颗粒解理断裂的比例明显高于未变形态。

The research is carried out about the microstructure, mechanical properties, deformation and fracture feature of 93 W alloy deformed by hydrostatic extrusion. The result shows that the strength of tungsten alloy increases with the increase of the deformation amount, the elongation of tungsten alloy decreases with the increase of the deformation amount; The deformation initiates from binder phase. The deformation is typical two-phase harmonious deformation, the crack generate from the W-W interface; The ratio of W particle cleavage in fracture surface of deformed tungsten alloy is greater than that of undeformed.