镍夹层厚度对316L/EH40复合界面特性影响

为了探究夹层厚度对复合材料组织及性能的影响规律,设定了4种带不同厚度镍夹层(0.05、0.10、0.15、0.20 mm)的复合试样,在相同条件下进行相同厚度试件的热压缩试验,通过金相显微分析技术对压缩后样件结合界面的微观组织进行分析、通过能谱分析对结合界面元素扩散情况进行分析,通过显微硬度测试对结合界面力学性能进行测...

Effect of nickel interlayer thickness on characteristics of 316L/EH40 composite interface

In order to explore the influence of interlayer thickness on the microstructure and properties of composite materials,four kinds of composite samples with different thickness of Ni interlayer(0.05,0.10,0.15,0.20 mm)were set up.Hot compression test of samples with the same thickness ratio was carried out under the same conditions.The microstructure of the interface after compression was analyzed by metallographic microanalysis technology,and the diffusion of elements at the interface was analyzed by energy spectrum analysis.The mechanical properties of the interface were tested by microhardness test and the tensile properties of the material were tested by tensile test.The results show that with the increase of the thickness of the nickel interlayer,the bonding interface became smooth,and the barrier effect of diffusion of carbon,chromium and other elements became better.When the thickness reached a certain degree,the mechanical properties of plate decreased with the increase of interlayer thickness.Besides,the hardness value near the 0.05 mm Ni layer appeared obvious mutation,and the change trend of hardness value near the other three thicknesses of interlayer was almost the same.Among them,the diffusion behavior of elements could be block well by the 0.10 mm thick Ni interlayer,and the excellent tensile property(512 MPa)at the interface of materials could also be ensured.