Influence of alloying elements on the microstructure and pitting behavior of high-strength Cr-Mn-Ni-N metastable austenitic stainless steels in the atmospheric environments with chloride ions

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Materials Characterization Pub Date : 2025-02-05 DOI:10.1016/j.matchar.2025.114818

Lele Liu , Hao Zhang , Hongyun Bi , E Chang , Moucheng Li

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Abstract

The microstructure and pitting behavior in the simulated atmospheric environments of three Cr-Mn-Ni-N metastable austenitic stainless steels (MASSs) with different alloying element contents were investigated through electron back scatter diffraction (EBSD), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), electrochemical measurements techniques and wet-dry cyclic corrosion test (CCT). The increase of Cr, Mn, Ni, N and Cu contents enhances the austenite stability and results in forming fewer mechanical twins, martensites and dislocation pile-ups for the steels with 10 % cold rolling reduction. The higher contents of Cr and N facilitate the formation of Cr₂O₃ and NH₄⁺ species in the passive films and then increase the pitting resistance of the steels. The average quantity, depth and width of the pits formed after the wet-dry CCT gradually decrease for the steels from 14Cr10Mn to 16Cr6Mn and 18Cr6Mn under the joint effect of microdefects and alloying elements.

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含氯离子大气环境中合金元素对高强度Cr-Mn-Ni-N亚稳奥氏体不锈钢显微组织和点蚀行为的影响

采用电子背散射衍射（EBSD）、透射电子显微镜（TEM）、x射线光电子能谱（XPS）、电化学测量技术和干湿循环腐蚀试验（CCT）研究了3种不同合金元素含量Cr-Mn-Ni-N亚稳奥氏体不锈钢（mass）在模拟大气环境中的显微组织和点蚀行为。Cr、Mn、Ni、N和Cu含量的增加提高了奥氏体的稳定性，减少了冷轧压下10%钢的机械孪晶、马氏体和位错堆积。较高的Cr和N含量有利于钝化膜中Cr2O3和NH4+的形成，从而提高钢的抗点蚀性。从14Cr10Mn到16Cr6Mn和18Cr6Mn钢，在微缺陷和合金元素的共同作用下，湿-干连续热镀后形成的坑的平均数量、深度和宽度逐渐减小。

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.