反向法确定钨合金基体细观性能及其宏观验证  

Determination of matrix micro-properties of tungsten alloy by inverse method and verification for its validity

作　　者：刘筱玲[1] 宋顺成[2,3] 史洪刚[4] 

机构地区：[1]西南科技大学土木工程与建筑学院,绵阳621010 [2]西南交通大学力学与工程学院,成都610031 [3]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [4]中国兵器科学研究院宁波分院,浙江宁波315103

出　　处：《材料科学与工艺》2009年第5期636-640,共5页Materials Science and Technology

基　　金：西南科技大学博士基金项目(08zx7115)

摘　　要：为了确定钨合金基体相的细观性能,采用纳米压痕实验测试了钨合金材料中基体相的细观硬度与弹性模量.利用反向确定法给出了钨合金材料中基体相的细观弹、塑性性质,根据纳米压痕实验中得到的载荷-位移关系,通过三维有限元计算给出了基体相的原位细观屈服强度和硬化模量.为探讨反向法确定钨合金基体细观性能的有效性,采用宏观实验给出了其宏观验证.宏观验证结果表明,用反向法确定钨合金基体材料的细观弹、塑性性质是可靠的.The microhardness and micro elastic modulus of matrix in tungsten alloy were respectively measured. The micro elastic-plastic properties of the matrix in tungsten alloy were obtained using the inverse method. According to the load-displacement relationships obtained from nano-indentation experiments, the parameters of micro yield strength and microhardening modulus of matrix in the tungsten alloy were given through three-dimensional finite element computations. Macro experiments were performed to verify the validity of this method. It is indicated that the inverse method is valid to determine the micro properties of matrix in tungsten alloy.

关 键 词：钨合金 细观力学性能 纳米压痕 有限元 反向法 

分 类 号：TG142.71[一般工业技术—材料科学与工程]