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Tempering Response of Bainitic and Martensitic Microstructures

机译：贝氏体和马氏体组织的回火响应

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The tempering response of fully martensitic microstructures has been well characterized. However, bainitic microstructures may also be found in quenched industrial materials and the present study investigates the tempering response of fully martensitic and fully bainitic microstructures. Specific thermal cycles were developed to generate both microstructures in a boron added 0.17 wt pct carbon steel. The tempering response was assessed through dilatometry and microstructural characterization was conducted using scanning electron microscopy and Mossbauer spectroscopy. The dilatometric analysis of the tempering response of the martensitic microstructures provided information about retained austenite decomposition and cementite precipitation whereas bainitic microstructures showed a less sensitive dilatometric response during tempering likely due to the low amount of carbon in solution and absence of retained austenite as measured by Mossbauer spectroscopy.
机译：全马氏体组织的回火响应已得到很好的表征。然而，贝氏体的微观结构也可能在淬火的工业材料中发现，本研究调查了完全马氏体和完全贝氏体的微观结构的回火响应。开发了特定的热循环以在添加了0.17 wt％的硼的碳钢中产生两种微观结构。通过膨胀计评估回火响应，并使用扫描电子显微镜和莫斯鲍尔光谱法进行微结构表征。马氏体微结构回火响应的热膨胀分析提供了有关残余奥氏体分解和渗碳体沉淀的信息，而贝氏体微结构显示回火过程中的灵敏热膨胀响应较弱，这可能是由于Mossbauer测得的溶液中碳含量低且没有残留奥氏体引起的。光谱学。

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