广西科学2006，Vol.13Issue(3)：212-216,5.
高温下钨断裂及氢影响钨断裂的分子动力学模拟
Molecular Dynamic Simulation of Fracture and Effect of Hydrogen on Fracture of Tungsten at High Temperature
摘要
Abstract
The fracture of Tungsten single crystal has been investigated under uniaxial strain at temperature 1000 K.The results indicate that the{100} plane cleaves more easily than the {110} plane.The cleavage of the {100}plane depends on the orientation of the crack-tip.The result is in good agreement with the experiment at low temperature. The simulation for the fracture of the ((1)10)<111> indicates that the fracture mechanism is not cleavage. Two cases of shear strain are also studied.The present results are also coincident with available experiments of room temperature.The present results indicate that the fracture of Tungsten at high temperature is similar to that at low temperature. The effect of Hydrogen on the fracture is also discussed. It can affect the front of the crack-tip and decrease the yield stress.关键词
分子动力学/钨/断裂/嵌入原子理论Key words
molecular dynamic simulation/Tungsten/fracture/embedded atom method分类
矿业与冶金引用本文复制引用
欧阳义芳,陈红梅,钟夏平..高温下钨断裂及氢影响钨断裂的分子动力学模拟[J].广西科学,2006,13(3):212-216,5.基金项目
Supported by National Natural Science Foundation of China (No.10264001). （No.10264001）
