Modelling strength and ductility of ultrafine grained BCC and FCC alloys using irreversible thermodynamics

被引：79
作者：
Huang, M. [1 ]
Rivera-Diaz-del-Castillo, P. E. J. [1 ]
Bouaziz, O. [2 ]
van der Zwaag, S. [1 ]
机构：
[1] Delft Univ Technol, Fac Aerosp Engn, NL-2629 HS Delft, Netherlands
[2] ArcelorMittal Res, F-57283 Maizieres Les Metz, France
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2009年 / 25卷 / 07期
关键词：
Thermodynamics; Ductility; Strength; Ultrafine grained alloys; Work hardening modelling; LOW-CARBON STEEL; C-MN STEEL; MECHANICAL-PROPERTIES; PLASTIC-DEFORMATION; NONEQUILIBRIUM THERMODYNAMICS; TENSILE PROPERTIES; WARM DEFORMATION; IF STEEL; METALS; MICROSTRUCTURE;
D O I：
10.1179/174328408X353750
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel grain size dependent strain hardening model is derived from the theory of irreversible thermodynamics. The model yields the evolution of the dislocation densities in the grain interior and at the grain boundary, as well as their contributions to the flow stress. It is found that submicron grain sizes have a lower dislocation density in the grain interior, causing ductility to decrease greatly. The predicted stress-strain curve shapes, uniform elongation and ultimate tensile strength values for interstitial free steels (body centred cubic) and aluminium alloys (AA1100, face centred cubic) show good agreement with experimental observations.
引用
收藏
页码：833 / 839
页数：7
相关论文
共 30 条
  • [1] [Anonymous], 2013, Physical Foundations of Materials Science, DOI DOI 10.1007/978-3-662-09291-0
  • [2] Properties of ultrafine-grained steel by repeated shear deformation of side extrusion process
    Azushima, A
    Aoki, K
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 337 (1-2): : 45 - 49
  • [3] Physical modelling of microstructure and mechanical properties of dual-phase steel
    Bouaziz, O
    Iung, T
    Kandel, M
    Lecomte, C
    [J]. JOURNAL DE PHYSIQUE IV, 2001, 11 (PR4): : 223 - 231
  • [4] BOUAZIZ O, 2006, P C MAT 2006 DIJ FRA
  • [5] Structure-property optimization of ultrafine-grained dual-phase steels using a micro structure-based strain hardening model
    Delince, M.
    Brechet, Y.
    Embury, J. D.
    Geers, M. G. D.
    Jacques, P. J.
    Pardoen, T.
    [J]. ACTA MATERIALIA, 2007, 55 (07) : 2337 - 2350
  • [6] Dieter G.E., 1986, MECH METALLURGY
  • [7] Boundary strengthening in undeformed and deformed polycrystals
    Hansen, N
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2005, 409 (1-2): : 39 - 45
  • [8] A PHENOMENOLOGICAL THEORY FOR PLASTIC DEFORMATION OF POLYCRYSTALLINE METALS
    HART, EW
    [J]. ACTA METALLURGICA, 1970, 18 (06): : 599 - &
  • [9] Ultrafine ferrite in low carbon steel
    Hodgson, PD
    Hickson, MR
    Gibbs, RK
    [J]. SCRIPTA MATERIALIA, 1999, 40 (10) : 1179 - 1184
  • [10] Irreversible thermodynamics modelling of plastic deformation of metals
    Huang, M.
    Rivera-Diaz-del-Castillo, P. E. J.
    Bouaziz, O.
    van der Zwaag, S.
    [J]. MATERIALS SCIENCE AND TECHNOLOGY, 2008, 24 (04) : 495 - 500
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