Thickness-dependent phase evolution of oxide scale studied by high temperature X-ray diffraction( HTXRD)
High temperature X-ray diffraction( HTXRD) was employed to investigate phase transformations of the thermally grown wustite ( Fe1-xO) within the oxide scale.The quantitative analysis of the relative phases,wustite,magnetite( Fe3O4 ),hematite ( a-Fe2O3 ) and α-Fe,during the decomposition of wustite in oxide scale at 550,500 and 450℃ were obtained by use of linear position sensitive detectors.The HTXRD results show that the diffraction patterns of eutectoid products( magnetite and α-Fe) develop with oxidation time and temperature with various thickness of oxide scale.The eutectoid transformation balances during the long period of time,with reflections corresponding to more intensity of magnetite than that of a-Fe.Eutectoid products in the oxide scale for thickness more than 15 μm have a decrease with the increase of temperature.However,for hematite it increases.The HTXRD gives potential insights on the phase evolution of oxide scale occurring after hot rolling,and it also provides the preliminary profiles of grain-size distribution for the analysis of the grain orientations.
hot rolling oxide scale magnetite wustite high temperature X-ray diffraction ( HTXRD)
Liang Hao Zhengyi Jiang Dongbin Wei Xiawei Cheng Kezhi Linghu
School of Mechanical,Materials & Mechatronic Engineering,University of Wollongong,Wollongong,NSW 252 Shougang Research Institute of Technology,Shougang,Beijing 100043,China
国内会议
上海
英文
1-5
2013-06-01（万方平台首次上网日期，不代表论文的发表时间）