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| Comparison of Measuring Content of Retained Austenite in X90 Pipeline Steel Between Applying XRD and Magnetic Method |
| ZHANG Yu-cheng, JU Xin-hua, MENG Yang, CUI Gui-bin, SHI Xue-xing, HAO Jing-li |
| Shougang Research Institute of Technology， Beijing 100043， China |
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Abstract The content of retained austenite at different locations of X90 pipeline steel such as the cross-section, the longitudinal section and the rolling surface was studied by means of X-ray Diffraction (XRD). The reason of the existence of big difference on the measured retained austenite content by XRD at different locations was discussed. The difference between XRD and magnetic method on measuring the content of retained austenite was also compared. The results showed that retained austenite content by XRD at the cross-section surface was much higher than that at longitudinal section and rolling surface. The obvious preferred orientation was found at the cross-section surface of samples while the orientation distribution was relatively uniform at longitudinal section and rolling surface. The measured content of retained austenite by XRD method was greatly influenced by preferred orientation which, however, showed no effect on the measured result by magnetic method.
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Received: 06 March 2014
Published: 02 November 2014
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2014, Vol. 49 
