基于中子衍射技术的航空发动机部件残余应力测试分析

Test and Analysis on Residual Stress of Aeroengine Components Based on Neutron Diffraction

为了研究航空发动机典型部件内部残余应力分布,介绍了材料残余应力常用的测试分析方法和中子衍射测试分析方法,并对各方法的分辨率和穿透深度进行了对比,详细阐述了中子衍射技术在航空发动机机匣、叶片、涡轮盘等部件的残余应力测试分析及材料微观变形机理研究方面的应用。与其他残余应力测试方法相比,中子衍射测试分析方法具有穿透能力强、分辨率高等优点,能够准确、无损地测试和分析材料的内部残余应力,可用于测量材料或工程部件的3维残余应力,为评估航空发动机部件的安全性和可靠性提供依据。

In order to study the distribution of internal residual stress of aeroengine typical components,the common test and analysis methods of material residual stress and neutron diffraction were introduced.The resolution and penetration depth of each method were compared.The application of neutron diffraction technique in residual stress test and analysis of aeroengine casing,blade,turbine disk and the study of micro deformation mechanism of materials were described in detail.Compared with other residual stress test methods,neutron diffraction test and analysis method have the advantages of strong penetration ability and high resolution.Neutron diffraction test and analysis method can accurately and nondestructive test and analyse the internal residual stress of materials,can be used to measure the three-dimensional residual stress of materials or engineering components,and can provide the basis for evaluating the safety and reliability of aeroengine components.