Twinning and Dislocation Evolution during Shock Compression and Release of Single Crystals: Real-Time X-Ray Diffraction

Physical Review Letters
Stefan J TurneaureYogendra M Gupta

Abstract

Determining the temporal evolution of twinning and/or dislocation slip, in real-time (nanoseconds), in single crystals subjected to plane shock wave loading is a long-standing scientific need. Noncubic crystals pose special challenges because they have many competing slip and twinning systems. Here, we report on time-resolved, in situ, synchrotron Laue x-ray diffraction measurements during shock compression and release of magnesium single crystals that are subjected to compression along the c axis. Significant twinning was observed directly during stress release following shock compression; during compression, only dislocation slip was observed. Our measurements unambiguously distinguish between twinning and dislocation slip on nanosecond timescales in a shocked hexagonal-close-packed metal.

Citations

May 22, 2019·Scientific Reports·Kouhei IchiyanagiShin-Ichi Adachi
Jul 1, 2020·Physical Review Letters·Surinder M SharmaY M Gupta
Jan 16, 2020·Scientific Reports·Jie ChenAvinash M Dongare
May 12, 2021·Scientific Reports·Avanish MishraAvinash M Dongare
Jun 10, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Qiancheng LiuFeng Zhao
Jul 17, 2021·Physical Review Letters·Jian LiTal Cohen
Dec 18, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Zhiyong JianWangyu Hu

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