Anisotropic strain in nitrided austenitic stainless steel
Anisotropic strain in nitrided austenitic stainless steel
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DOI：
10.1063/1.1289520
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发表时间：
2000-08
影响因子：
3.2
通讯作者：
S. Mändl;B. Rauschenbach
中科院分区：
文献类型：
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作者：
S. Mändl;B. Rauschenbach
奥氏体不锈钢在300-400 °C左右的温度下进行氮处理会形成一种称为膨胀奥氏体的坚硬且耐腐蚀的相。该相最令人困惑的特征是各向异性晶格膨胀，其中沿着（100）方向的膨胀比（111）方向的膨胀大约20%。本文用X射线衍射法研究了氮等离子体浸没离子注入奥氏体不锈钢后的晶格膨胀。进行极图测量以及不同极角的θ/2θ扫描。将数据与三种不同的结构模型（fcc、四斜晶系和三斜晶系）进行比较，可以得出结论，它们都没有产生与数据良好的一致性，因此晶体学表征仍然是开放的。然而，所观察到的晶格膨胀的原子起源的各向异性的杨氏模量的基础上，这是发现每一个面心立方金属的模型，呈现出良好的协议与…
Nitrogen treatment of austenitic stainless steels at temperatures around 300–400 °C leads to the formation of a hard and corrosion resistant phase called expanded austenite. The most puzzling feature of this phase is an anisotropic lattice expansion where the expansion along the (100) is about 20% larger than for the (111) direction. In this report an investigation of the lattice expansion of austenitic stainless steel after nitrogen plasma immersion ion implantation by x-ray diffraction is presented. Pole figure measurements as well as θ/2θ scans at different polar angles were performed. Comparing the data with three different structural models, fcc, tetragonal, and triclinic, it can be concluded that none of them yields good agreement with the data, so that the crystallographic characterization is still open. However, a model for the atomic origin of the observed lattice expansion based on the anisotropic Young’s modulus, which is found for every fcc metal, is presented, showing good agreement with the ...