Relationship between composite structures and compressive properties in CuZr-based bulk metallic glass system

Wu, Yuan; Song, Wenming; Zhang, ZhongYan; Hui, Xidong; Ma, Dong; Wang, Xun-Li; Shang, XinCun; Liu, Xiongjun

doi:10.1007/s11434-011-4858-4

Cited by 22 publications

(21 citation statements)

References 25 publications

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“…(b) The present composites are superior in tensile properties among various BMG composites in different systems ductilized by different crystalline phases68910112224282930313233.…”

Section: Figurementioning

confidence: 84%

Microstructural percolation assisted breakthrough of trade-off between strength and ductility in CuZr-based metallic glass composites

Liu

et al. 2014

Sci Rep

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As two important mechanical properties, strength and ductility generally tend to be muturally exclusive in conventional engineering materials. The breakthrough of such a trade-off has been potentiated by the recently developed CuZr-based bulk metallic glass (BMG) composites ductilized by a shape memory CuZr(B2) phase. Here the microstructural dependences of tensile properties for the CuZr-based BMG composites were elucidated qualitatively and modeled quantitatively, and the underlying mechanisms were unraveled. Through the microstructural percolation induced by matching the length scales of particle size and interparticle spacing, a notable breakthrough was achieved in the composites that the general conflicts between strength and ductility can be defeated. This study is expected to greatly aid in the microstructural design and tailoring for improved properties of BMG composites. It also has implications for the development of strong and ductile materials in the future.

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“…(b) The present composites are superior in tensile properties among various BMG composites in different systems ductilized by different crystalline phases68910112224282930313233.…”

Section: Figurementioning

confidence: 84%

Microstructural percolation assisted breakthrough of trade-off between strength and ductility in CuZr-based metallic glass composites

Liu

et al. 2014

Sci Rep

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“…For example, CuZr-based BMG composites with different sample sizes containing minor element additions such as Al, Ti, Ag, Ni, Co, Y, Er, V, W, or Ta have been successfully fabricated [20][21][22][23][24][25][29][30][31][32][33][34][35][36][37]. Two key requirements should be satisfied for the fabrication of CuZr-based BMG composites: (1) maintaining sufficiently high glass-forming ability (GFA) in order to fabricate large-sized BMG composites [20][21][22][23][24][25][29][30][31][32][33][34][35][36][37]; and (2) stabilization of metastable B2 CuZr phase in order to suppress its decomposition into equilibrium phases (EPs) [29][30][31][32][33][34]. Previous results [22,38] demonstrated that minor Co addition to CuZr alloys can dramatically enhance the thermal stability of the B2 CuZr phase but gravely deteriorate the GFA of CuZr-based alloys.…”

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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“…It was known that yield strength and Young's modulus of composite materials can usually be estimated from properties of the constituent phases by the -rule of mixtures (ROM)‖ principle. Based on the yield strength of the monolithic amorphous matrix and pure B2-CuZr phase[26,27], the estimated values of these BMG composites are also shown as the dashed line in…”

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confidence: 99%

Transformation-induced plasticity in bulk metallic glass composites evidenced by in-situ neutron diffraction

et al. 2017

Acta Materialia

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Transformation-induced plasticity in a strain-softening amorphous matrix consisting of austenite B2 was studied by in-situ neutron diffraction, coupled with molecular dynamic simulation. It was found that the martensitic transformation from B2 to B19' upon loading commenced at the macroscopic yielding which increased with the decrease of the fraction of the parent austenite B2 phase, and the threshold lattice strain for the martensitic transformation is almost the same in different samples, suggesting that the martensitic transformation in the current glassy matrix is strain-controlled. Analysis of load partition and strain accommodation unveiled that B2 has elastic anisotropy, and the desirable elastic match between B2 and the amorphous matrix ensures a good cooperative deformation. Additionally, molecular dynamic simulation revealed that atoms at the interface between B2 and the amorphous matrix deviated from the standard B2 lattices and acted as nucleation site for the martensitic transformation, eventually giving rise to the strain-controlled martensitic transformation. Our findings provide new insights into the mechanism of phase transformation-mediated plasticity at the microscopic level, and have useful implications for developing novel, high-performance bulk metallic glass composites.

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Relationship between composite structures and compressive properties in CuZr-based bulk metallic glass system

Cited by 22 publications

References 25 publications

Microstructural percolation assisted breakthrough of trade-off between strength and ductility in CuZr-based metallic glass composites

Microstructural percolation assisted breakthrough of trade-off between strength and ductility in CuZr-based metallic glass composites

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

Transformation-induced plasticity in bulk metallic glass composites evidenced by in-situ neutron diffraction

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