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首页> 外文期刊>Metallurgical and Materials Transactions A >Surface Relief Due to Bainite Transformation at 473 K (200 °C)
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Surface Relief Due to Bainite Transformation at 473 K (200 °C)

机译：贝氏体相变在473 K（200°C）下的表面浮雕

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摘要

Extremely thin plates of bainitic ferrite can now routinely be induced in steels by heat–treatment at low homologous temperatures. Given the atomic mechanism by which the transformation occurs, morphology should be dominated by the minimization of strain energy due to the displacements necessary to accomplish the change in crystal structure when austenite decomposes into bainite. Experiments were conducted using atomic force microscopy in an attempt to characterize these displacements, with a surprising outcome that the shear strain is much larger than associated with conventional, coarser bainitic structures. It appears that this might explain why the plates of bainitic ferrite tend to be slender in this new class of nanostructured alloys.
机译：现在可以通过在低同源温度下进行热处理，在钢中常规地诱导出极薄的贝氏体铁素体板。给定发生转变的原子机理，由于奥氏体分解成贝氏体时完成晶体结构变化所必需的位移，应以应变能的最小化来控制形态。为了描述这些位移，使用原子力显微镜进行了实验，结果出乎意料的是，剪切应变比常规的，较粗糙的贝氏体结构要大得多。看来，这可以解释为什么在这种新型的纳米结构合金中，贝氏体铁素体的平板趋于细长。

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