高比重钨合金准静态和动态断裂韧性研究  

Study on Quasi-Static and Dynamic Fracture Toughness of Tungsten Heavy Alloy

作　　者：杨梓清 YANG Ziqing

机构地区：[1]西南交通大学机械工程学院摩擦学研究所,四川成都610031

出　　处：《科技创新与应用》2022年第2期15-19,共5页Technology Innovation and Application

摘　　要：文章研究了高比重钨合金95W-3.5Ni-1.5Fe在准静态和动态加载下的断裂特性,开展实验测试了该材料在准静态和动态加载下的断裂韧性。准静态试验利用三点弯半圆形试样在万能试验机上加载,并根据测试标准ASTM E399得到了准静态断裂韧性。动态加载则是利用三点弯半圆形试样在霍普金森压杆上进行冲击加载,分析了试样在冲击过程中的动态力平衡条件,并依照准静态方法计算了钨合金在不同冲击速率下的动态断裂韧性,最后讨论了加载速率对钨合金断裂韧性的影响。The fracture properties of the tungsten heavy alloy 95W-3.5Ni-1.5Fe under quasi-static and dynamic loading are studied,and experiments are carried out to test the fracture toughness of the material under quasi-static and dynamic loading.In the quasi-static test,the three-point bending semicircular specimens are loaded on a universal testing machine,and the quasi-static fracture toughness is obtained according to the test standard ASTM E399.In the dynamic test,the three-point bending semicircular specimens are loaded on the split Hopkinson pressure bar.The dynamic force balance conditions of the specimen during the impact process is discussed,and the dynamic fracture toughness of tungsten alloy under different loading rates are calculated according to the quasi-static method.Finally,the influence of loading speed on the fracture toughness of tungsten alloys is discussed.

关 键 词：高比重钨合金 动态断裂韧性 霍普金森压杆 半圆形试样 

分 类 号：TB31[一般工业技术—材料科学与工程]