论文部分内容阅读
初步探讨了钛／钢爆炸复合界面层内钛侧所产生的绝热剪切带（ａｄｉａｂａｔｉｃｓｈｅａｒｂａｎｄ）在热处理及各种准静态加载（如拉伸、压缩、疲劳等）后其内部组织和力学性能等冶金行为的变化情况，为绝热剪切敏感材料的工程应用提供实验依据和理论指导。试验结果表明，经热处理及拉伸、压缩等准静态加载后ＡＳＢ内的显微硬度值都高于其钛基体的显微硬度值；经５５０℃，３０ｍｉｎ退火后（低于纯钛的再结晶温度），ＡＳＢ内已形成等轴再结晶组织，经６２５℃，３０ｍｉｎ退火后，ＡＳＢ消失；由于ＡＳＢ的附近钛基体在组织和性能上的差异，ＡＳＢ内及ＡＳＢ与基体交界处是疲劳载荷下二次裂纹容易萌生的地方。
The internal structure and mechanical properties of the adiabaticshearband produced on the titanium side of the titanium / steel explosive interface were investigated preliminarily. After the heat treatment and various quasi-static loadings (such as tensile, compressive and fatigue) Behavior changes, provide experimental basis and theoretical guidance for engineering application of adiabatic shear sensitive materials. The results show that the microhardness values of ASB after heat treatment, tensile and compression are all higher than those of titanium matrix. After annealing at 550 ℃ for 30min (lower than the recrystallization of pure titanium Temperature), ASB has formed an equiaxed recrystallized microstructure, after annealing at 625 ℃, 30min, ASB disappeared; due to differences in the microstructure and properties of the titanium substrate near the ASB, ASB and the junction of the ASB and the substrate under fatigue load Secondary cracks easily sprout place.