A hot-rolled AZ31 magnesium alloy exhibiting fibre texture with strong (0001) basal component was studied. The experimental study were carried on TKSN 400 (HK9) diffractometer in the NPI in Řež (Czech Republic) using angular dispersion method. The in-situ diffraction measurement during compression followed by tension load applied in rolling direction allowed to obtain evolution of texture (from diffraction peak intensity) and grain stress for the preferred grain orientations. The evolution of peak intensity for different hkl reflections were combined with orientation distribution function determined before- and after-cycle test. As the result, the observed variation in volume fraction of grains having selected orientations allowed to describe twinning and detwinning effects. On the basis of measured lattice strains combined with changes in crystallographic texture, the CRSS value for the first order tensile twinning was determined. The obtained values are in good agreement with the values previously found using ToF (time of flight) diffraction [1,2]. The most important result is the description of the detwinning process and measured value of CRSS for this process.

1. P. Kot, M. Wroński, A. Baczmański, A. Ludwik, et al. Measurement, 221, (2023), 113469.

2. A. Baczmański, P. Kot, S. Wroński, M. Wróbel, et al., Materials Science & Engineering A, 801, (2021), 140400

This work was financed by grants from the National Science Centre, Poland (NCN), No. UMO-2021/41/N/ST5/00394 and UMO-2023/49/B/ST11/00774.

P. K. has been partly supported by EU Horizon 2020 research and innovation program under Grant Agreement No. 857470 and the European Regional Development Fund via the Foundation for Polish Science International Research Agenda PLUS, Grant No. MAB PLUS/2018/8.
Measurements partly were carried out at the CANAM infrastructure of the NPI CAS Řež. The employment of the CICRR infrastructure supported by MEYS project LM2023057 is acknowledged.