Strain Induced Martensitic Transformation in Austempered Ductile Iron (ADI)

6th European Conference on Neutron Scattering

Li, X.H.^1 ; Saal, P.^2 ; Gan, W.M.^3 ; Landesberger, M.^2 ; Hoelzel, M.^1 ; Hofmann, M.^1

HeinzMaier-Leibnitz Zentrum (MLZ), Technische UniversitatMünchen, Lichtenbergstr. 1, Garching

D-85747, Germany^1

Institute of Metal Forming and Casting, Technische Universitat München, Walther-Meißner-Str. 4, Garching

D-85747, Germany^2

German Engineering Materials Centre at MLZ, Helmholtz-Zentrum Geesthacht, Garching

D-85747, Germany^3

关键词: Austempered ductile irons;    Austempering temperature;    Bulk texture measurements;    Degree of deformations;    Orientation distributions;    Quantitative phase analysis;    Strain induced martensitic transformation;    Texture information;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/746/1/012055/pdf
DOI  :  10.1088/1742-6596/746/1/012055

来源: IOP

【 摘 要 】

The strain induced martensitic transformation in austempered ductile iron (ADI) has been investigated using high resolution neutron diffraction on samples compressed ex-situ to different plastic strains. In addition bulk texture measurements using neutron diffraction have been performed to calculate the orientation distribution of ferrite and austenite phases for different strain levels. Combing the detailed texture information with neutron diffraction pattern proved to be essential for quantitative phase analysis and extraction of martensite phase fractions. The martensite content induced by strain in ADI depends on austempering temperature and degree of deformation.