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Version: publishedVersion × Subject: martensitic transformation ×

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    Deformation-induced martensitic transformation in Cu-Zr-Zn bulk metallic glass composites
    (Basel : MDPI, 2015) Wu, Dianyu; Song, Kaikai; Cao, Chongde; Li, Ran; Wang, Gang; Wu, Yuan; Wan, Feng; Ding, Fuli; Shi, Yue; Bai, Xiaojun; Kaban, Ivan; Eckert, Jürgen
    The microstructures and mechanical properties of (Cu0.5Zr0.5)100−xZnx (x = 0, 1.5, 2.5, 4.5, 7, 10, and 14 at. %) bulk metallic glass (BMG) composites were studied. CuZr martensitic crystals together with minor B2 CuZr and amorphous phases dominate the microstructures of the as-quenched samples with low Zn additions (x = 0, 1.5, and 2.5 at. %), while B2 CuZr and amorphous phases being accompanied with minor martensitic crystals form at a higher Zn content (x = 4.5, 7, 10, and 14 at. %). The fabricated Cu-Zr-Zn BMG composites exhibit macroscopically appreciable compressive plastic strain and obvious work-hardening due to the formation of multiple shear bands and the deformation-induced martensitic transformation (MT) within B2 crystals. The present BMG composites could be a good candidate as high-performance structural materials.
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    Growth and martensitic transformation of ferromagnetic Co-Cr-Ga-Si epitaxial films
    (Abingdon : Taylor & Francis, 2023) Ge, Yuru; Lünser, Klara; Ganss, Fabian; Gaal, Peter; Fink, Lukas; Fähler, Sebastian
    During cooling, conventional martensitic transformation can only be realized from austenite to martensite. Recently, a so-called reentrant martensitic transformation attracted much interest due to an additional transformation from martensite to austenite during further cooling. Obviously, materials with this reentrant transformation will increase the number of physical effects and possible applications. However, until now, only bulk samples have been available, which are not suitable for applications in micro-devices. In this work, we focus on the Co-Cr-Ga-Si system and examine the suitability of this system for the growth of thin films. We observed that the films grow epitaxially on MgO (100) substrates and exhibit a martensitic transformation if deposited at a sufficiently high temperature or with an additional heat treatment. Films within the austenite state are ferromagnetic while films within the martensitic state just exhibit a very low ferromagnetic order.