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Article
Open AccessLocal microstructure evolution at shear bands in metallic glasses with nanoscale phase separation
At room temperature, plastic flow of metallic glasses (MGs) is sharply localized in shear bands, which are a key feature of the plastic deformation in MGs. Despite their clear importance and decades of study, ...
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Article
Hierarchical densification and negative thermal expansion in Ce-based metallic glass under high pressure
The polyamorphsim in amorphous materials is one of the most fascinating topics in condensed matter physics. In amorphous metals, the nature of polyamorphic transformation is poorly understood. Here we investig...
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Article
Effect of Cobalt on Phase Formation, Microstructure, and Mechanical Properties of Cu50−xCoxZr50 (x = 2, 5, 10, 20 at. pct) Alloys
In this work, the effect of cobalt on the phase formation and mechanical properties of rapidly solidified Cu50−xCoxZr50 (x = 2, 5, 10, and 20 at. pct) alloys was investigated. CuZr martensite forms in the case of...
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Article
Designing Zr-Cu-Co-Al Bulk Metallic Glasses with Phase Separation Mediated Plasticity
New Zr-based bulk metallic glasses (BMGs) with improved plasticity were developed in the Zr-Cu-Co-Al system by a combination of Zr45Cu50Al5 and Zr55Co25Al20 BMGs with a certain concentration ratio. The compressiv...
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Article
Open AccessDeformation induced structural evolution in bulk metallic glasses
The structural behavior of binary Cu50Zr50 and ternary Cu50Zr45Ti5 bulk metallic glasses (BMGs) under applied stress was investigated by means of in-situ high energy X-ray synchrotron diffraction. The components ...
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Article
AlNiYCo Amorphous Matrix Composites Induced by Bismuth and Lead Additions
(Al85Ni5Y8Co2)98Bi2 and (Al85Ni5Y8Co2)98(Bi50Pb50)2 alloys are rapidly solidified using the single-roller melt-spinning method. Al85Ni5Y8Co2 amorphous matrix composites containing faceted BiY particles are synthe...
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Article
The influence of in situ formed precipitates on the plasticity of Fe-Nb-B-Cu bulk metallic glasses
Improved room temperature plasticity was achieved by microalloying Cu in a series of (Fe71Nb6B23)100−xCux (x = 0, 0.25, 0.5, 0.75, and 1) glass matrix alloys with tunable size and volume fraction of precipitates ...
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Article
Insight into the Formation of Ultrafine Nanostructures in Bulk Amorphous Zr54.5 Ti7.5Al10Cu20Ni8
Bulk amorphous Zr54.5 Ti7.5Al10Cu20Ni8 is investigated by means of smal-angle neutron scattering (SANS), differential-scanning calorimetry (DSC), high-resolution electron microscopy (HREM) and other methods. The ...
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Article
Evolution of constitution, structure, and mechanical properties in Fe-Ti-Zr-B heterogeneous multiphase composites
The constituent phases, the microstracture, and the mechanical properties of a series of Fe87-xTi7Zr6Bx (x = 0, 2, 4, 6, 8, 10, and 12) alloys produced by copper mold casting were investigated. Partial substituti...
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Article
Transformation-induced plasticity in Fe-Cr-V-C
On the basis of the Fe84.3C4.6Cr4.3Mo4.6V2.2 high-speed tool steel, manufactured under relatively high cooling rates and highly pure conditions, a further improvement of the mechanical characteristics by slight m...
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Article
High-strength bulk Al-based bimodal ultrafine eutectic composite with enhanced plasticity
An in situ bulk ultrafine bimodal eutectic Al-Cu-Si composite was synthesized by solidification. This heterostructured composite with microstructural length scale hierarchy in the eutectic microstructure, whic...
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Article
Microstructure and mechanical properties of slowly cooled Zr66.4Nb6.4Cu10.5Ni8.7Al8.0 with ductile bcc phase
We report about the preparation and properties of a Be-free Zr66.4Nb6.4Cu10.5Ni8.7Al8.0 alloy with a glassy or a nanocrystalline matrix and ductile bcc precipitates, which were developed with the aim to improve t...
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Article
Phase Equilibria in the Ternary System Fe-Gd-Mo at 600 °C
Phase equilibria in the ternary system Fe-Gd-Mo at 600 °C were determined. The phase composition for different element concentrations were quantitatively determined from the diffraction patterns by means of t...
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Article
In-situ observation of the nitrogenation of Sm2Fe17 by means of high temperature x-ray diffraction
The mechanism of nitrogenation of Sm2Fe17 was investigated with in-situ high temperature x-ray diffraction with Debye-Scherrer optic using a quartz capillary equipped with an additional buffer volume to supply s...
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Article
Structure investigations of thin MoSx films
The influence of process parameters on the formation of microstructure of magnetron-sputtered MoSx-films on silicon wafers was investigated. The MoSx-films were analyzed by means of X-ray diffraction and TEM. The...
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Article
Evaluation of texture parameters in NdFeB magnets by means of X-Ray and magnetic measurements
NdFeB samples of different texture degree were prepared by uniaxial pressing in a magnetic field of different strength. Afterwards, the texture formation was investigated by means of X-ray diffraction. Usually...
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Dynamical X-Ray Diffraction Study on the Phase Transformation in Rapidly Quenched Au71Sn29 Alloy
Materials can be obtained in a non-equilibrium state by means of rapid quenching as e.g. amorphous alloys, metastable phases, supersaturated solutions. These alloys undergo phase transformation into the stable...
