Kinetic study of non-isothermal crystallization in Al80Fe10Ti5Ni5 metallic glass

Tavoosi, M.; Karimzadeh, F.; Lee, S.; Kim, Hyoung Seop

doi:10.1007/s12540-013-5001-7

Cited by 10 publications

(5 citation statements)

References 32 publications

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“…However, the manufacturing costs are still high because of relatively expensive alloying elements and the need of vacuum equipment, and problems such as brittle fracture need to be solved. [6][7][8] When amorphous alloys which do not have dislocations are deformed, plastic zones are hardly observed under tensile or compressive loading because the plastic deformation is concentrated on highly localized shear bands. [9][10][11][12] If amorphous alloys containing a sufficient amount of ductile phases in the amorphous matrix are developed by utilizing conventional alloys such as a representative (a+b) Ti-6Al-4V alloy, the brittle fracture in amorphous alloys can be solved, together with an economical merit of the reduction in manufacturing costs.…”

Section: Introductionmentioning

confidence: 99%

Effects of Effective Dendrite Size on Tensile Deformation Behavior in Ti-Based Dendrite-Containing Amorphous Matrix Composites Modified from Ti-6Al-4V Alloy

Jeon

Lee

Kim

et al. 2014

Metall Mater Trans A

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Five composite sheets having different thicknesses were fabricated by varying cooling rates after a vacuum arc melting of a Ti-based amorphous matrix composite fabricated by adding alloying elements of Ti, Zr, V, Ni, Al, and Be into a Ti-6Al-4V alloy. These composite sheets contained 72 to 75 vol. pct of dendrites sized by 9 to 27 lm, and showed excellent tensile properties of yield strength of 1.3 GPa and elongation up to 6.5 pct. According to the observation of tensile deformation behavior of the 3-mm-thick composite sheet, many deformation bands were formed inside dendrites in several directions, and deformation bands met crossly each other to form widely deformed areas. Since the wide and homogeneous deformation in this sheet beneficially worked for the tensile strength and elongation simultaneously, the optimum effective dendrite size (12.1 lm) and sheet thickness (3 mm) were determined for the Ti-based amorphous matrix composite. The finite element method (FEM) analysis based on real microstructures was also conducted to theoretically explain the enhanced elongation in terms of effective dendrite size. The shape and location of deformation bands estimated from the FEM simulations were well matched with the experimental observations.

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Section: Introductionmentioning

confidence: 99%

Effects of Effective Dendrite Size on Tensile Deformation Behavior in Ti-Based Dendrite-Containing Amorphous Matrix Composites Modified from Ti-6Al-4V Alloy

Jeon

Lee

Kim

et al. 2014

Metall Mater Trans A

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“…have been remarkably made by developing amorphous alloys with high glass-forming ability, [1][2][3][4][5][6][7] but there are problems to be solved, typical one of which is brittle fracture. [8,9] In order to overcome this brittle fracture, development activities on composite-type alloys by homogeneously distributing ductile crystalline dendrites in Zr-or Ti-based amorphous matrix have been actively performed.…”

Section: Recently Advances In Bulk Amorphous Alloysmentioning

confidence: 99%

Unique Appearance of Lamellar Cleavage Patterns on Fracture Surfaces of Ti-Based Amorphous Matrix Composite

Jeon

Suh

Kim

et al. 2015

Metall Mater Trans A

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In order to improve mechanical properties of Ti-based amorphous matrix composites basically composed of ductile b-Ti dendrites and brittle amorphous matrix by overcoming their inherent brittle nature, their fracture mechanisms should be verified in relation with microstructure, stress intensity factor level, and crack growth rate. In this study, thus, detailed fractographic observations including the unique appearance of lamellar cleavage patterns, which has not been reported in previous studies on conventional metals and alloys, were conducted. According to fractographic results, lamellar cleavage patterns were formed by repeated interruptions of crack propagation on {100} cleavage planes by difference between dendrite orientation and loading direction. Ductile-to-brittle transition phenomenon (ductile dimpled fracture fi lamellar cleavage fracture fi ordinary cleavage fracture in dendrite areas, and vein pattern fi smooth pattern in amorphous matrix areas) occurred with increasing crack growth rate was also plausibly explained by the concept of time required for crack growth as well as dendrite orientation.

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“…For this purpose, one of the most effective methods is the mechanical alloying technique [5]. This processing route refines the grain size toward nanoscale regime for enhancement of mechanical properties and it is known as one of the main methods for synthesizing advanced materials [6][7][8][9][10][11]. The consolidation processes, however, are required to obtain a bulk material from the mechanically alloyed powders and the involved high-temperature processing might result in grain growth of the constituent phases.…”

Section: Introductionmentioning

confidence: 99%

Mechanical alloying and consolidation of copper‐iron‐silicon carbide nanocomposites

Rabiee

Mirzadeh

Ataie

2020

Materialwissenschaft Werkst

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Mechanical alloying, cold pressing, and sintering were used for synthesizing bulk copper, copper‐iron, and copper‐iron‐silicon carbide nanomaterials. The precipitation of iron during sintering of the supersaturated mechanically alloyed powder significantly enhanced the thermal stability of the nanocomposite against grain growth. Moreover, the hardness of sintered composites was found to increase with increasing milling time, which was attributed to the work‐hardening, crystallite refinement, and increasing the relative density (decrease in porosity). Although the addition of silicon carbide did not affect the mean crystallite size of the bulk samples, it effectively increased the hardness of the nanocomposite based on its composite strengthening effect.

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Kinetic study of non-isothermal crystallization in Al80Fe10Ti5Ni5 metallic glass

Cited by 10 publications

References 32 publications

Effects of Effective Dendrite Size on Tensile Deformation Behavior in Ti-Based Dendrite-Containing Amorphous Matrix Composites Modified from Ti-6Al-4V Alloy

Effects of Effective Dendrite Size on Tensile Deformation Behavior in Ti-Based Dendrite-Containing Amorphous Matrix Composites Modified from Ti-6Al-4V Alloy

Unique Appearance of Lamellar Cleavage Patterns on Fracture Surfaces of Ti-Based Amorphous Matrix Composite

Mechanical alloying and consolidation of copper‐iron‐silicon carbide nanocomposites

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