Molecular Dynamic Simulation of Fracture and Effect of Hydrogen on Fracture of Tungsten at High Temperature
Author(s): OUYANG Yi-fang, CHEN Hong-mei, ZHONG Xia-ping
Pages: 212-216
Year: 2006 Issue: 3
Journal: GUANGXI SCIENCES
Keyword: molecular dynamic simulation; Tungsten; fracture; embedded atom method;
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.
Pages: 212-216
Year: 2006 Issue: 3
Journal: GUANGXI SCIENCES
Keyword: molecular dynamic simulation; Tungsten; fracture; embedded atom method;
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.
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