Understanding the detection of carbon in austenitic high-Mn steel using atom probe tomography
Understanding the detection of carbon in austenitic high-Mn steel using atom probe tomography
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DOI：
10.1016/j.ultramic.2013.01.010
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发表时间：
2013-09-01
期刊：
影响因子：
2.2
通讯作者：
Raabe, D.
中科院分区：
文献类型：
--
作者：
Marceau, R. K. W.;Choi, P.;Raabe, D.
本文研究了一种成分为Fe-22Mn-0.6C(wt%)的高锰TWIP钢，为了准确、定量地分析原子探针分析中的团簇和短程有序，需要对该体系中的碳检测有更好的了解。实验测量表明，高比例的碳原子以分子离子物种的形式被探测到，并在多次命中事件中被检测到，这一点从分析过程中的最佳实验参数、关联场蒸发和样品尖端表面碳原子的定向行走/迁移等问题进行了讨论。这些现象影响了原子探测器测量的成分和空间精度，因此需要仔细考虑进一步的星系团发现分析。(C)2013爱思唯尔B.V.保留所有权利。
A high-Mn TWIP steel having composition Fe-22Mn-0.6C (wt%) is considered in this study, where the need for accurate and quantitative analysis of clustering and short-range ordering by atom probe analysis requires a better understanding of the detection of carbon in this system. Experimental measurements reveal that a high percentage of carbon atoms are detected as molecular ion species and on multiple hit events, which is discussed with respect to issues such as optimal experimental parameters, correlated field evaporation and directional walk/migration of carbon atoms at the surface of the specimen tip during analysis. These phenomena impact the compositional and spatial accuracy of the atom probe measurement and thus require careful consideration for further cluster-finding analysis. (C) 2013 Elsevier B.V. All rights reserved.