Twin boundary-accelerated ferritization of austenitic stainless steels in liquid lead-bismuth eutectic
Twin boundary-accelerated ferritization of austenitic stainless steels in liquid lead-bismuth eutectic
复制标题
DOI：
10.1016/j.scriptamat.2016.02.029
复制
发表时间：
2016-06-01
影响因子：
6
通讯作者：
Lambrinou, K.
中科院分区：
文献类型：
--
作者：
Hosemann, P.;Frazer, D.;Lambrinou, K.
奥氏体不锈钢暴露于溶解氧浓度低的液态铅铋共晶中通常会导致高溶解度合金元素的选择性浸出以及溶解影响区的铁素体化。在这项工作中，利用聚焦离子束、透射电子背散射衍射和扫描透射电子显微镜来阐明冷加工奥氏体不锈钢在 450 摄氏度下暴露于静态贫氧液态铅铋共晶溶液中 1000 小时的溶解腐蚀过程的早期阶段。研究发现，冷加工钢块中变形引起的孪晶边界提供了液态金属加速渗透到钢块中的路径。 (C) 2016 Elsevier Ltd. 保留所有权利。
Exposure of austenitic stainless steels to liquid lead-bismuth eutectic with low concentration of dissolved oxygen typically results in selective leaching of highly-soluble alloying elements and ferritization of the dissolution affected zone. In this work, focused ion beam, transmission electron backscatter diffraction and scanning transmission electron microscopy were utilized to elucidate early-stage aspects of the dissolution corrosion process of cold-worked austenitic stainless steels exposed to static, oxygen-poor liquid lead-bismuth eutectic at 450 degrees C for 1000 h. It was found that deformation-induced twin boundaries in the cold-worked steel bulk provide paths of accelerated penetration of the liquid metal into the steel bulk. (C) 2016 Elsevier Ltd. All rights reserved.