ABSTRACT There exist no materials and/or structures of technical importance without residual stresses. The residual stress management concept has gained importance in industrial applications aiming to improve service performance and useful life of the product. Thus, the industry requests rapid, reliable, and nondestructive methods to determine residual stress state. The aim of this article is to investigate the applicability of the Magnetic Barkhausen Noise (MBN) method to measurement of surface residual stresses in the carburized steels. To comprehend the differences in the surface residual stress state, 19CrNi5H steel samples were carburized at 900°C for 8 and 13 hours, and then, tempered in the range of 180°C and 600°C. The MBN measurement results were correlated with those obtained by the X-ray diffraction (XRD) measurements. Microstructural investigations and hardness measurements were also conducted. For this particular study, it was concluded that both techniques give similar qualitative results for monitoring of the residual stress variations in the carburized and tempered steels. Since the MBN method is much faster than the XRD method, from the industrial point of view it is a very strong candidate for qualitative monitoring of residual stress variations. With an appropriate pre-calibration by considering the effect of microstructure, the MBN method may give reliable quantitative results for residual stress.

中文翻译：

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磁巴克豪森噪声法在渗碳和回火 19CrNi5H 钢残余应力无损测量中的适用性

摘要 不存在没有残余应力的具有技术重要性的材料和/或结构。残余应力管理概念在旨在提高产品服务性能和使用寿命的工业应用中越来越重要。因此，业界需要快速、可靠和无损的方法来确定残余应力状态。本文的目的是研究磁巴克豪森噪声 (MBN) 方法在渗碳钢表面残余应力测量中的适用性。为了解表面残余应力状态的差异，19CrNi5H 钢样品在 900°C 下渗碳 8 小时和 13 小时，然后在 180°C 和 600°C 范围内回火。MBN 测量结果与通过 X 射线衍射 (XRD) 测量获得的结果相关联。还进行了微观结构研究和硬度测量。对于这项特定的研究，得出的结论是，这两种技术在监测渗碳钢和回火钢的残余应力变化方面给出了相似的定性结果。由于 MBN 方法比 XRD 方法快得多，因此从工业角度来看，它是残余应力变化定性监测的有力候选者。通过考虑微观结构的影响进行适当的预校准，MBN 方法可以提供可靠的残余应力定量结果。由于 MBN 方法比 XRD 方法快得多，因此从工业角度来看，它是残余应力变化定性监测的有力候选者。通过考虑微观结构的影响进行适当的预校准，MBN 方法可以提供可靠的残余应力定量结果。由于 MBN 方法比 XRD 方法快得多，因此从工业角度来看，它是残余应力变化定性监测的有力候选者。通过考虑微观结构的影响进行适当的预校准，MBN 方法可以提供可靠的残余应力定量结果。