Fe-based bulk metallic glasses with a larger supercooled liquid region and high ductility

Qiu, Ke; Pang, Jing; Ren, Yinglei; Zhang, H.B.; Ma, Chao; Zhang, T.

doi:10.1016/j.msea.2008.08.026

Cited by 14 publications

(5 citation statements)

References 17 publications

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“…However, low ductility and poor fracture toughness are often their main drawbacks; thus, efforts continue to be made to improve these properties [4][5][6][7][8]. This requires improvement in materials processing, as well as the development of accurate fracture toughness measurement techniques.…”

Section: Introductionmentioning

confidence: 99%

Bulk Mechanical Properties Testing of Metallic Marginal Glass Formers

Phan

Kelly

Kassner

et al. 2016

Journal of Metallurgy

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We developed a unique three-point bend testing apparatus to measure bulk mechanical properties of a model metallic glass alloy (SAM2X5 with nominal composition Fe 49.7 Cr 17.1 Mn 1.9 Mo 7.4 W 1.6 B 15.2 C 3.8 Si 2.4 ) prepared by spark plasma sintering. The relatively large sample sizes in the present work allowed for the preparation of test specimens with a macroscale cross section (in the millimeter range) with well-controlled sample dimensions closer to standardized tests. Wire saw cutting allowed for a relatively sharp notch radius (3x smaller than previous studies) and minimal sample damage. We determined that Young's modulus and notch fracture toughness measured by our three-point bending apparatus are 230 GPa and 4.9 MPa⋅m 1/2 . Also, Vickers indentation and flexure testing provided consistent results for Young's modulus. Indentation fracture toughness measured by Vickers indentation produced values at least 50% lower than by flexure. The microscale mechanical properties testing technique presented in this work and subsequent analyses are applicable to specimens of other compositions or ones prepared by other methods.

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Section: Introductionmentioning

confidence: 99%

Bulk Mechanical Properties Testing of Metallic Marginal Glass Formers

Phan

Kelly

Kassner

et al. 2016

Journal of Metallurgy

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“…The relative density of the compacts was determined by Archimedes method. The volume fractions of the two phases involved in the composite were calculated by 3 . The mechanical properties of the hot pressed compacts were evaluated by compression test with a cross-head speed of 0.5 mm/min on cylindrical compacts of the dimensions of 3 mm in diameter and about 6 mm in height with both sides being parallel polished.…”

Section: Pressurized Liquid Phase Sinteringmentioning

confidence: 99%

“…1) Fe-based metallic glasses exhibit a high mechanical strength and an excellent soft magnetic properties. [2][3][4] However, the glass forming ability, as well as the thermal stability of the soopercooled liquid, of the Fe-based metallic glasses is low compared to the other metallic glasses such as Zr-and Pdbased alloys. Bulk samples of the Fe-based metallic glasses of the dimension of over 10 mm have not yet been prepared by conventional copper mold casting techniques 1,5) presumably because of their difficulties in keeping a sufficient cooling rate throughout the casted sample to maintain glassy state.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Fe Based Metallic Glass–Pd Based Metallic Glass Composite by Slightly Pressured Liquid Phase Sintering

et al. 2010

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To consolidate [(Fe 0:5 Co 0:5 ) 0:75 Si 0:05 B 0:2 ] 96 Nb 4 metallic glass powder to full density, a pressurized liquid phase sintering was employed, which was intended to promote densification by an enhanced wetting of a liquid phase with solid particles. Pd 42:5 Ni 7:5 P 20 Cu 30 metallic glass powder, which has been reported to have a high glass forming ability and the lowest critical cooling rate of glass formation of 0.067 K/s, was chosen as a liquid phase component. The melting point of the Pd 42:5 Ni 7:5 P 20 Cu 30 metallic glass alloy of 763 K is lower than the glass transition temperature of the [(Fe 0:5 Co 0:5 ) 0:75 Si 0:05 B 0:2 ] 96 Nb 4 metallic glass alloy of 808 K. However, the wettability of this alloy with the Pd 42:5 Ni 7:5 P 20 Cu 30 alloy was revealed to be poor. Therefore, sintering pressure was applied to the compacts to promote a viscous flow deformation of solid particles and also to enhance the intergranular permeation of the liquid phase. A specially designed micro-hot press was devised for the pressure-sintering experiment. A pseudo-wettability was observed during pressure-sintering, and the liquid phase was found to fill completely the intergranular space of the powder compact. The relative density of 64-95%, as well as the sintering structure, could be controlled by the punch displacement to squeeze out a part of the liquid phase from the compact. The compressive fracture strength of the obtained metallic glass composite was found to be as high as 2051 MPa, and the fracture was observed to be intragranular type, suggesting a good bonding in the particle-binding phase interface.

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“…[1,2]. Among these BMGs, Fe-based ferromagnetic BMGs are more attractive not only because of their excellent soft magnetic properties, high strength and high corrosion resistance, but also their abundant natural resources and low material cost, so a variety of Fe-based ferromagnetic BMGs have been developed [3][4][5][6][7][8][9][10][11][12][13][14][15]. However, it is difficult to develop Fe-based ferromagnetic BMGs combined with large glass-forming ability (GFA) and high saturation magnetization (I s ).…”

Section: Introductionmentioning

confidence: 99%

“…However, it is difficult to develop Fe-based ferromagnetic BMGs combined with large glass-forming ability (GFA) and high saturation magnetization (I s ). In order to enhance the GFA, the Fe-based ferromagnetic BMGs usually contain special glass-forming elements (such as Nb, Cr, Zr, W, Ti, Tb, Dy, and Er) having large atomic size and negative mixing enthalpies with the constituent elements [3,4,[6][7][8][9][10][11][12]14,15], which leads to the decrease of the I s . In 2007, an Fe-based ferromagnetic alloy system simultaneously exhibiting large GFA and high I s was synthesized by Makino et al [16], and the GFA was further improved by adding Mo element [17].…”

Section: Introductionmentioning

confidence: 99%

Crystallization behaviors of FeSiBPMo bulk metallic glasses

Zhang

Shen

Zhang

2013

Journal of Non-Crystalline Solids

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Fe-based bulk metallic glasses with a larger supercooled liquid region and high ductility

Cited by 14 publications

References 17 publications

Bulk Mechanical Properties Testing of Metallic Marginal Glass Formers

Bulk Mechanical Properties Testing of Metallic Marginal Glass Formers

Synthesis of Fe Based Metallic Glass–Pd Based Metallic Glass Composite by Slightly Pressured Liquid Phase Sintering

Crystallization behaviors of FeSiBPMo bulk metallic glasses

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Fe-based bulk metallic glasses with a larger supercooled liquid region and high ductility

Cited by 14 publications

References 17 publications

Bulk Mechanical Properties Testing of Metallic Marginal Glass Formers

Bulk Mechanical Properties Testing of Metallic Marginal Glass Formers

Synthesis of Fe Based Metallic Glass&ndash;Pd Based Metallic Glass Composite by Slightly Pressured Liquid Phase Sintering

Crystallization behaviors of FeSiBPMo bulk metallic glasses

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Synthesis of Fe Based Metallic Glass–Pd Based Metallic Glass Composite by Slightly Pressured Liquid Phase Sintering