In situ synchrotron X-ray diffraction study of deformation behavior and load transfer in a Ti2Ni-NiTi composite

Junsong Zhang, Yinong Liu, Y. Ren, Y. Huan, S. Hao, C. Yu, Y. Shao, Y. Ru, D. Jiang, L. Cui

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Abstract

The deformation behavior and load transfer of a dual-phase composite composed of martensite NiTi embedded in brittle Ti2Ni matrices were investigated by using in situ synchrotron x-ray diffraction during compression. The composite exhibits a stage-wise deformation feature and a double-yielding phenomenon, which were caused by the interaction between Ti2Ni and NiTi with alternative microscopic deformation mechanism. No load transfer occurs from the soft NiTi dendrites to the hard Ti2Ni matrices during the pseudoplastic deformation (detwinning) of NiTi, which is significantly different from that previously reported in bulk metallic glasses matrices composites. © 2014 AIP Publishing LLC.
Original languageEnglish
Pages (from-to)4
JournalApplied Physics Letters
Volume105
Issue number4
DOIs
Publication statusPublished - 31 Jul 2014

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