GH4169/K418B复合及功能梯度材料性能研究

Research on GH4169/K418B composite and functionally gradient materials

基于激光同轴送粉LENS方式对GH4169/K418B两种材料分别进行了复合材料及功能梯度材料的制备,并通过对其试验样件进行微观组织分析及力学性能测试,研究了不同比例成分复合材料及功能梯度材料的各项性能参数,结果表明:与纯GH4169材料相比,当GH4169/K418B比例为80%/20%时,其弹性模量提高了64.1%,屈服强度提高了22.8%,抗拉强度提高了23.5%,而当比例K418B比例过高时,其力学性能会显著下降;功能梯度材料由于其成分上的梯度特性,在性能上表现出了“取长补短”的选择特性,其弹性模量为80.1GPa、屈服强度为567.67MPa、抗拉强度为790 MPa,各项性能均处于各复合材料的优秀水平,可以适用于航空航天领域中对各项性能均有一定要求的复杂场景。

Based on the laser coaxial powder feeding LENS method,the composite materials and functional gradient materials of GH4169/K418B were prepared.The elastic modulus of GH4169/K418B was increased by 64.1%when the ratio of GH4169/K418B was 80%/20%compared with the pure GH4169.The yield strength was increased by 22.8%,the tensile strength was increased by 23.5%.When the proportion of K418B exceeded the threshold,the mechanical properties of functional gradient materials was significantly reduced.Due to the gradient characteristics of its composition,the performance of GH4169/K418B functionally mradient aterials showed the“learning from each other”.Its elastic modulus of 80.1 GPa,yield strength of 567.67 MPa,tensile strength of 790 MPa,the performance is at the excellent level of each composite material,can be applied to the aerospace field has certain requirements for various performance of the complex scene.