摘要
通过细观分析,给出钨颗粒相的形状、组分和两相力学参数对钨合金宏观屈服强度的影响.其中,钨颗粒看作基体上的夹杂,在小变形条件下假设钨颗粒仅发生弹性变形,而钨合金的宏观屈服强度决定于基体相的屈服强度.在该假设基础上,利用Eshelby方法及Mori-Tanake平均应力概念计算分析了不同钨合金材料,特别是不同变形量工艺处理的钨合金材料的宏观屈服强度,计算结果与实验结果基本一致.
The effects of shape and volume fraction of W-phase and mechanical parameters of two phases on macro-yield strength of tungsten alloy were presented, where the tungsten grains were considered as the inclu- sions in the matrix and in the deforming process the tungsten grains were supposed to deform elastically, so the macro-yield strength of tungsten alloy was dependent on the strength of the matrix. Using Eshelby method and Mori-Tanake concept of ‘ average stress＇ , the macro-yield strength of the different tungsten alloys including the treated tungsten alloys by super-deforming technology was analyzed. The results of analysis are in agree- ment with the results of tests.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2007年第5期697-700,704,共5页
Materials Science and Technology
关键词
钨合金
钨颗粒
基体相
宏观屈服强度
细观力学参数
tungsten alloy
tungsten grain
matrix phase
macro-yield strength
meso-mechanical parameters
