Tensile deformation of Si single crystals with easy glide orientation

Tubasa Suzuki, Masaki Tanaka, Tatsuya Morikawa, Jun Fujise, Toshiaki Ono

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Silicon single crystals were deformed in tensile tests along the [134] direction between 1173K and 1373K. The yield point phenomenon was observed in the specimens deformed below 1273K, while a continuous yield was observed in the specimens deformed above 1323K. The values of work-hardening rate in stage II were the same as those reported in other single crystals. Orientation maps of the specimen obtained by using electron backscattered electron diffraction method indicated that stage II starts before the Schmid factor of the secondary slip system became larger than that of the primary slip system. Because of the constraint due to the gripping of the test piece, kink bands are formed during stage I before the onset of stage II, and then the stress state becomes non-uniaxial. This suggests that the formation of kink bands triggers the activation of the secondary, i.e., conjugate slip system to increase the resolved shear stress on the conjugate slip systems.

    Original languageEnglish
    Pages (from-to)975-981
    Number of pages7
    JournalMaterials Transactions
    Volume62
    Issue number7
    DOIs
    Publication statusPublished - 2021

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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