Creep simulation of 9-12% Cr steels using the composite model with thermodynamically calculated input

被引:19
作者
Barkar, T [1 ]
Ågren, J [1 ]
机构
[1] Royal Inst Technol, S-10044 Stockholm, Sweden
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2005年 / 395卷 / 1-2期
关键词
chromium steels; creep; modeling; dislocation structure; subgrain boundaries; particle hardening;
D O I
10.1016/j.msea.2004.12.004
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Creep of 9-12% Cr steels is modeled using the composite model, developed by Blum et al. [R. Sedlacek, W. Blum, Comput. Mater. Sci. 25 (2002) 200], and thermodynamic calculations based on the Calphad approach. The composite model yields a physical description of the deformation behavior of materials that have a pronounced heterogeneous dislocation structure and is briefly surveyed. A few of the input parameters have been thermodynamically calculated using Thermo-Calc and introduced to the main program via a programming interface. This combined approach allows us to simulate the creep deformation behavior with less extensive microstructural investigations. This is a step towards enabling predictions of the creep behavior predominantly based on the nominal composition, heat treatment and mechanical load. Simulation results for two different 9-12% Cr steels are presented. (c) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:110 / 115
页数:6
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