Physical interpretation of the microstructure for aged 12 Cr-Mo-V-W steel creep test samples based on simulation of magnetic incremental permeability

Bhaawan Gupta (1, 2) , Benjamin Ducharne (1) , Gael Sebald (2) , Tetsuya Uchimoto (2, 3) , Takamichi Miyazaki (4) , Toshiyuki Takagi (3)

1 LGEF - Laboratoire de Génie Electrique et Ferroélectricité
2 ELyTMaX
3 IFS - Institute of Fluid Sciences [Sendai]
4 Department of Materials Processing Engineering

Magnetic Incremental Permeability (MIP) being highly stress dependent proves to be very effective to evaluate materials non-destructively. In this article, modelling technique based on Jiles-Atherton model has been proposed to simulate the signature MIP butterfly loop for the 12 Cr-Mo-V-W creep test samples. Jiles-Atherton parameters imply physical interpretations. From these butterfly loops, a physical relation, based on the values of the J-A's parameters, with the microstructure such as precipitations, dislocations, Kernel Average Misorientation (KAM) has been investigated with experimental as well as simulation validations. It is especially observed that J-A's parameters are well correlated to the precipitation quantity and KAM. © 2019 Elsevier B.V.

Mots clés: micro magnetic non-destructive testing; creep; Jiles-Atherton model; Magnetic incremental permeability

Domaines: Sciences de l'ingénieur [physics]

Bhaawan Gupta, Benjamin Ducharne, Gael Sebald, Tetsuya Uchimoto, Takamichi Miyazaki, et al.. Physical interpretation of the microstructure for aged 12 Cr-Mo-V-W steel creep test samples based on simulation of magnetic incremental permeability. Journal of Magnetism and Magnetic Materials, 2019, 486, pp.165250. ⟨10.1016/j.jmmm.2019.165250⟩. ⟨hal-02166924⟩