Ti–Cu–Ni shape memory bulk metallic glass composites

Gargarella, Piter; Pauly, S.; Song, Kaikai; Hu, Jing; Barekar, Nilam S.; Khoshkhoo, M. Samadi; Teresiak, A.; Wendrock, H.; Kühn, U.; Ruffing, Christoph; Kerscher, Eberhard; Eckert, J.

doi:10.1016/j.actamat.2012.09.042

Cited by 87 publications

(49 citation statements)

References 42 publications

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“…3 As observed in our previous work, 14 the Ti 50 Cu 43 Ni 7 alloy shows martensitic transformation around 350 K in samples partially or fully crystalline produced by casting. The B2 crystals in these samples exhibit sizes in the micrometer scale.…”

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confidence: 58%

“…2 Rapid solidification can hamper the formation of these phases due to kinetic constraints and thus extends the composition range in which the B2-Ti(Cu,Ni) phase forms. 3 At sufficiently high cooling rates, even Ti-Cu-Ni metallic glasses can be obtained by completely suppressing the formation of any crystalline phase. 4 Several Ti-Cu-Ni-based bulk metallic glasses have been already reported but no systematic studies have been conducted to identify their phase formation during crystallization.…”

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confidence: 99%

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Structural evolution in Ti-Cu-Ni metallic glasses during heating

et al. 2015

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The structural evolution of Ti50Cu43Ni7 and Ti55Cu35Ni10 metallic glasses during heating was investigated by in-situ synchrotron X-ray diffraction. The width of the most intense diffraction maximum of the glassy phase decreases slightly during relaxation below the glass transition temperature. Significant structural changes only occur above the glass transition manifesting in a change in the respective peak positions. At even higher temperatures, nanocrystals of the shape memory B2-Ti(Cu,Ni) phase precipitate, and their small size hampers the occurrence of a martensitic transformation.

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confidence: 58%

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confidence: 99%

Structural evolution in Ti-Cu-Ni metallic glasses during heating

et al. 2015

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“…Recently, it has been found that, by introducing a shape memory ductile phase into the glassy matrix, the fabricated BMG composites show not only a pronounced tensile ductility but also a macroscopic work-hardening capability during deformation at room temperature [19][20][21][22][23][24][25][26][27]. Upon loading, besides the formation of multiple shear bands in the glassy matrix, ductile shape memory crystals experience the martensitic transformation (MT) from a cubic phase to monoclinic phases [19][20][21][22][23][24][25][26][27], which can provide the pronounced work hardening.…”

Section: Introductionmentioning

confidence: 99%

“…Upon loading, besides the formation of multiple shear bands in the glassy matrix, ductile shape memory crystals experience the martensitic transformation (MT) from a cubic phase to monoclinic phases [19][20][21][22][23][24][25][26][27], which can provide the pronounced work hardening. Hence, the weakness of the work-softening effect during deformation of BMG composites can be effectively overcome.…”

Section: Introductionmentioning

confidence: 99%

Deformation-Induced Martensitic Transformation in Cu-Zr-Zn Bulk Metallic Glass Composites

Song

Cao

et al. 2015

Metals

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Abstract: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 OPEN ACCESSMetals 2015, 5 2135 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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“…However, their poor ductility at room temperature has significantly limited their application as a potential engineering material [4][5][6] . In order to improve the plasticity of the BMGs, the mechanisms of deformation and fracture have been deeply investigated via both experimental and theoretical approaches.…”

Section: Introductionmentioning

confidence: 99%