Model-based interpretation of thermal desorption spectra of Fe-C-Ti alloys

被引：50
作者：
Drexler, Andreas [1 ]
Depover, Tom [2 ]
Verbeken, Kim [2 ]
Ecker, Werner [1 ]
机构：
[1] Mat Ctr Leoben Forsch GmbH, Roseggerstr 12, A-8700 Leoben, Austria
[2] Ghent Univ UGent, Dept Mat Text & Chem Engn, Technol Pk 903, B-9052 Ghent, Belgium
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 789卷
关键词：
Steel; Alloy; Electrochemical calculations; Modelling studies; Hydrogen embrittlement; Stress corrosion; INDUCED MECHANICAL DEGRADATION; INDUCED DUCTILITY LOSS; HYDROGEN EMBRITTLEMENT; QUANTITATIVE-ANALYSIS; GENERALIZED-MODEL; DIFFUSION; SPECTROSCOPY; METALS; TRAPS; DISLOCATIONS;
D O I：
10.1016/j.jallcom.2019.03.102
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A model-based evaluation procedure by a trap-diffusion integrated finite element model (FEM) is used to interpret the experimentally measured thermal desorption spectra (TDS) of Fe-C-Ti alloys. Two material conditions are compared, i.e. as-quenched vs. quenched and tempered, in which TiC have precipitated. The discrepancy between measurement and simulation is found to be very small for all material conditions. The model shows high trapping energies of around 58 kJ/mol to 110 kJ/mol (0.61 eV-1.14 eV), when the materials are tempered. These traps could be related to carbon vacancies in TiC precipitates. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码：647 / 657
页数：11
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