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首页> 外文期刊>Materials Science and Engineering >Martensite transformation behavior and mechanical properties of cold-rolled metastable Cr-Mn-Ni-N austenitic stainless steels
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Martensite transformation behavior and mechanical properties of cold-rolled metastable Cr-Mn-Ni-N austenitic stainless steels

机译：冷轧亚稳Cr-Mn-Ni-N奥氏体不锈钢的马氏体转变行为和力学性能

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摘要

In order to understand the mechanism of substitution for nickel with manganese in metastable austenitic stainless steels 14Cr10Mn and 16Cr6Mn, the transformation behavior of ε- and α′- martensite and the corresponding mechanical properties were investigated in this study. The microstructures and tensile and hardness properties of the cold-rolled steels under different rolling reductions at ambient temperature were measured using X-ray diffraction (XRD), scanning electron microscope (SEM) together with an electron back scatter diffraction (EBSD) and transmission electron microscope (TEM). The results show that α′- martensite is not easy to be transformed from austenite, and the martensite transformation γ → ε → α′ in 14Cr10Mn and 16Cr6Mn metastable stainless steels is found during cold rolling. The results also reveal that ε- martensite acts as an hardness reinforcing phase, and high total martensite volume fraction and ratio of ε- and α′- martensite content are helpful to achieve higher tensile strength with sigmoidal shape stress-strain curves. In addition, a model considering cold rolling reduction was developed to predict the contents of ε- and α′- martensite in the steels.
机译：为了了解亚稳态奥氏体不锈钢14Cr10Mn和16Cr6Mn中锰置换镍的机理，研究了ε-和α'-马氏体的转变行为以及相应的力学性能。使用X射线衍射（XRD），扫描电子显微镜（SEM）以及电子背散射衍射（EBSD）和透射电子测量了室温下不同轧制压下量的冷轧钢的组织，拉伸性能和硬度性能显微镜（TEM）。结果表明，α'-马氏体不易从奥氏体转变，在冷轧过程中发现14Cr10Mn和16Cr6Mn亚稳不锈钢中的马氏体转变为γ→ε→α'。结果还表明，ε-马氏体起到硬度增强相的作用，高的总马氏体体积分数以及ε-和α'-马氏体含量的比例有助于以S形应力-应变曲线获得更高的拉伸强度。另外，建立了考虑冷轧压下量的模型来预测钢中ε-和α'-马氏体的含量。

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