含空洞镍基单晶高温合金拉伸分子动力学研究

Molecular Dynamics Study on Tensile Strength of Nickel Based Single Crystal High-temperature Alloys Containing Voids

镍基金属高温合金因其优异的高温力学性能成为航空发动机和航天发动机高温部件的关键材料,但该材料在加工成型过程中,由于工艺方法水平限制,不可避免地会产生缺陷,空洞是其中一种缺陷。空洞对材料的整体力学性能有着不可忽视的影响。因此,研究空洞对材料性能的具体作用显得尤为重要。鉴于此,重点分析含有空洞的镍基金属单晶高温合金在不同温度、应变速率和晶体取向下的拉伸变形行为,并通过研究塑性变形的微观机理来解释其变形过程。

Nickel based metal high-temperature alloys have become key materials for high-temperature components of aviation and aerospace engines due to their excellent high-temperature mechanical properties.However,during the processing and forming process of this material,due to limitations in the level of technology,defects are inevitably generated,and voids are one of the defects.Voids have an undeniable impact on the overall mechanical properties of materials.Therefore,studying the specific role of voids on material properties is particularly important.In view of this,the focus is on analyzing the tensile deformation behavior of nickel based single crystal high-temperature alloys containing voids at different temperatures,strain rates,and crystal orientations,and explaining their deformation process by studying the microscopic mechanism of plastic deformation.