Characteristics of Ti-Ni-Zr Thin Film Metallic Glasses Exhibiting a Shape Memory Effect after Crystallization

Junpei Sakurai; Yuko Aono; Yui Ishida; Seiichi Hata

doi:10.4028/www.scientific.net/MSF.654-656.1066

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Mechanical Properties and Structures of High Entropy Alloys and Bulk Metallic Glasses Composites
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Bulk Metallic Glass Formation, Crystallization, and Magnetic Properties of RE₄Fe₇₂B₂₂M₂ Alloys
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Characteristics of Ti-Ni-Zr Thin Film Metallic Glasses Exhibiting a Shape Memory Effect after Crystallization
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Relaxation Behavior of Zr-Cu-Al Ternary Bulk Glassy Alloy Studied by Using Positron Annihilation Techniques
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Influence of Solidification Speed on Quality and Quantity of Structural Defects in Fe₆₁Co₁₀Zr_2.5Hf_2.5Y₂W₂B₂₀ Amorphous Alloy
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Devitrification Studies of Mg₆₀Cu₂₉Gd₁₁ Bulk Metallic Glas
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Characteristics of Ti-Ni-Zr Thin Film Metallic Glasses Exhibiting a Shape Memory Effect after Crystallization

Abstract:

We investigated characteristics of Ti-Ni-Zr amorphous thin films before and after annealing, in order to search for novel Ti-Ni-Zr thin film metallic glasses (TFMGs) that exhibit a shape memory effect after crystallization. We found that the Ti42Ni47Zr11 TFMG exhibited a stable shape memory effect after crystallization. This alloy showed a glass transition with the glass transition and crystallization temperatures of 703 and 760 K, respectively. Moreover, this alloy showed a one-step martensitic phase transformation of B2 to B19', when annealed at 973 K for 3.6 ks. The martensitic phase start temperature and reverse martensitic phase start temperature were 296 and 352 K, respectively. In addition, this alloy showed a recovery strain of about 2.4%.