Open AccessFollowing Microstructures during Deformation: In situ X-ray/Neutron Diffraction and HRDIC
Author(s) -
Efthymios Polatidis,
K. Sofinowski,
Wei-Neng Hsu,
H. Van Swygenhoven
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/580/1/012010
Subject(s) - materials science , microstructure , neutron diffraction , austenite , deformation (meteorology) , alloy , nanocrystalline material , deformation mechanism , diffraction , digital image correlation , in situ , crystallography , composite material , metallurgy , optics , nanotechnology , physics , chemistry , meteorology
The mechanical behavior of three engineering materials is studied employing in situ deformation methods. The study covers metastable austenitic steels with different stacking fault energies during multiaxial loading, a Ti-6Al-4V alloy processed by electron beam melting during uniaxial deformation and a commercial nanocrystalline NiTi alloy during multiaxial deformation. The experimental results obtained by in situ X-ray or neutron diffraction elucidate the load transfer and phase transformation mechanisms, information that is averaged over a relatively large volume containing a statistically representative number of grains. Complementary in situ high resolution digital image correlation allows details to be revealed regarding the localized strain accommodation and slip activity with a sub-grain spatial resolution. It is demonstrated that the synergy of the different length-scale investigations provides a better understanding of the complex relationship between microstructure and deformation behavior in these materials.