利用定量逐层研磨和计算机辅助重建及可视化技术, 研究了Fe--0.28C--3.0Mo (质量分数, %)合金钢中TTT曲线港湾形 鼻尖温度以下形成的退化铁素体的三维形态. 三维观察和分析表明, 退化铁素体最初在奥氏体晶界形成, 然后不是向晶 界扩展, 而是长向晶内. 退化铁素体由棒状亚单元组成, 每个亚单元的直径为 1---2 μm, 长度为几微米. 该合金钢中退化铁素体的奇特形貌可能是由铁 素体晶粒的重复形核、长大以及相临铁素体晶粒的合并而形成的.
3-D morphology of the degenerate ferrite formed below the bay of the TTT diagram in an Fe-0.28C-3.0Mo (mass fraction, %) steel has been revealed by utilizing serial sectioning in conjunction with computer-aided reconstruction and visualization. The degenerate ferrite is initially formed at prior austenite boundary and then grows toward grain interior rather than along the grain boundary. The degenerate ferrite consists of rod-like subunits, each several micron in length and 1-2 μm in diameter. The peculiar morphology of ferrite may be attributed to the repeated nucleation, growth and coalescence of the adjacent ferrite crystals.
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| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] | |
| [9] |
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