Neutron Diffraction and Diffraction Contrast Imaging for Mapping the TRIP Effect under Load Path Change

Efthymios Polatidis; Manuel Morgano; Florencia Malamud; Michael Bacak; Tobias Panzner; Helena Van Swygenhoven; Markus Strobl

doi:10.3390/ma13061450

Neutron Diffraction and Diffraction Contrast Imaging for Mapping the TRIP Effect under Load Path Change

Materials (Basel). 2020 Mar 23;13(6):1450. doi: 10.3390/ma13061450.

Authors

Efthymios Polatidis¹, Manuel Morgano¹, Florencia Malamud², Michael Bacak¹, Tobias Panzner^{1

3}, Helena Van Swygenhoven^{4

5}, Markus Strobl¹

Affiliations

¹ Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, Villigen PSI, CH-5232 Villigen, Switzerland.
² CONICET, Laboratorio Argentino de Haces de Neutrones, Departamento de Física de Neutrones, Centro Atómico Bariloche, San Carlos de Bariloche R8402AGP, Argentina.
³ Swissneutronics AG, CH-5313 Klingnau, Switzerland.
⁴ Swiss Light Source, Paul Scherrer Institute, Villigen PSI, CH-5232 Villigen, Switzerland.
⁵ Neutrons and X-rays for Mechanics of Materials, IMX, Ecole Polytechnique Federale de Lausanne, CH-1015 Lausanne, Switzerland.

Abstract

The transformation induced plasticity (TRIP) effect is investigated during a load path change using a cruciform sample. The transformation properties are followed by in-situ neutron diffraction derived from the central area of the cruciform sample. Additionally, the spatial distribution of the TRIP effect triggered by stress concentrations is visualized using neutron Bragg edge imaging including, e.g., weak positions of the cruciform geometry. The results demonstrate that neutron diffraction contrast imaging offers the possibility to capture the TRIP effect in objects with complex geometries under complex stress states.

Keywords: Bragg edge; TRIP; load path change; neutron.