采用不同准直管直径和不同摆动角度对无应力粉末、细晶材料、较大晶粒材料进行残余应力测试,研究了残余应力测试结果的影响因素。结果表明:不同准直管直径和不同摆动角度对无应力粉末及细晶材料的残余应力测试结果影响不大,对较大晶粒材料的残余应力测试结果影响较大;采用较大的准直管直径并增大摆动角度,可以改善较大晶粒材料的衍射峰峰形及对称性,提高其测试结果的准确性。

The residual stress of stress-free powder, fine-grained material and large-grained material was tested by different collimator diameters and different swing angles, the influencing factors of residual stress test results were studied. The results show that different collimation tube diameters and different swing angles had little effect on the residual stress test results of stress-free powder and fine-grained materials, but had a great influence on the residual stress test results of larger grain materials. Using a larger diameter of the collimating tube and increasing the swing angle could improve the peak shape and symmetry of the diffraction peak of the larger grain material and improve the accuracy of the test results.