Characterization of carbon ion implantation induced graded microstructure and phase transformation in stainless steel
Characterization of carbon ion implantation induced graded microstructure and phase transformation in stainless steel
复制标题
不锈钢中碳离子注入诱导的分级显微组织和相变的表征
DOI：
10.1016/j.matchar.2015.04.019
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发表时间：
2015-08-01
影响因子：
4.7
通讯作者：
Chu, Paul K.
中科院分区：
文献类型：
--
作者：
Feng, Kai;Wang, Yibo;Chu, Paul K.
奥氏体不锈钢316 L通过碳离子注入，注入通量为1.2 x 10（17）离子-cm（-2）、2.4 x 10（17）离子-cm（-2）和4.8 x 10（17）离子-cm（-2）。利用X射线衍射、X射线光电子能谱和高分辨透射电镜研究了离子注入不锈钢梯度组织和相变。用动电位法评价了镀层的耐蚀性。结果表明，该合金的初始相为奥氏体，并含有少量铁素体。低注量碳离子注入后，在注入层中形成非晶层和铁素体相富集区。由于能量的最小化和较大的离子注入注量的辐照，纳米粒子从非晶层中析出。随着注入剂量的增加，沉淀的纳米粒子的形貌由圆形变为哑铃状。不锈钢经碳离子注入后形成非晶层和石墨化的固态碳，从而提高了不锈钢的耐蚀性。皇冠版权所有（C）2015由爱思唯尔公司出版保留所有权利。
Austenitic stainless steel 316L is ion implanted by carbon with implantation fluences of 1.2 x 10(17) ions-cm(-2), 2.4 x 10(17) ions-cm(-2), and 4.8 x 10(17) ions-cm(-2). The ion implantation induced graded microstructure and phase transformation in stainless steel is investigated by X-ray diffraction, X-ray photoelectron spectroscopy and high resolution transmission electron microscopy. The corrosion resistance is evaluated by potentiodynamic test. It is found that the initial phase is austenite with a small amount of ferrite. After low fluence carbon ion implantation, an amorphous layer and ferrite phase enriched region underneath are formed. Nanophase particles precipitate from the amorphous layer due to energy minimization and irradiation at larger ion implantation fluence. The morphology of the precipitated nanophase particles changes from circular to dumbbell-like with increasing implantation fluence. The corrosion resistance of stainless steel is enhanced by the formation of amorphous layer and graphitic solid state carbon after carbon ion implantation. Crown Copyright (C) 2015 Published by Elsevier Inc All rights reserved.