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一位移关系,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.
参考文献
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