Origin of the simultaneous improvement of strength and plasticity in Ti-based bulk metallic glass matrix composites

Yu Chan Kim, Eric Fleury, Jae Chul Lee, Do Hyang Kim

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

W-rich particle-reinforced Ti-based bulk metallic glass (BMG) matrix composites with a compressive strength approaching 3 GPa and a fracture strain of approximately 12% were developed. In contrast to most existing BMG matrix composites, in which the improved ductility was obtained only at the expense of the strength, the composites developed in this study exhibited a significant enhancement in their strength, as well as an improvement in the plasticity. This improvement m the plasticity was attributed to the blocking and circumscription of the shear band propagation, leading to the formation of a large number of shear bands. Using a classical elasticity theory of inclusions, the improvement of the strength was interpreted as resulting from the generation of tensile residual stresses in the matrix due to the difference in the coefficient of thermal expansion between the W-rich particles and the BMG matrix.

Original languageEnglish
Pages (from-to)2474-2479
Number of pages6
JournalJournal of Materials Research
Volume20
Issue number9
DOIs
Publication statusPublished - 2005 Sep 1

Fingerprint

Metallic glass
metallic glasses
plastic properties
Plasticity
Shear bands
composite materials
Composite materials
matrices
shear
Tensile stress
Compressive strength
Thermal expansion
Ductility
compressive strength
Elasticity
Residual stresses
ductility
tensile stress
residual stress
thermal expansion

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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abstract = "W-rich particle-reinforced Ti-based bulk metallic glass (BMG) matrix composites with a compressive strength approaching 3 GPa and a fracture strain of approximately 12{\%} were developed. In contrast to most existing BMG matrix composites, in which the improved ductility was obtained only at the expense of the strength, the composites developed in this study exhibited a significant enhancement in their strength, as well as an improvement in the plasticity. This improvement m the plasticity was attributed to the blocking and circumscription of the shear band propagation, leading to the formation of a large number of shear bands. Using a classical elasticity theory of inclusions, the improvement of the strength was interpreted as resulting from the generation of tensile residual stresses in the matrix due to the difference in the coefficient of thermal expansion between the W-rich particles and the BMG matrix.",
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Origin of the simultaneous improvement of strength and plasticity in Ti-based bulk metallic glass matrix composites. / Kim, Yu Chan; Fleury, Eric; Lee, Jae Chul; Kim, Do Hyang.

In: Journal of Materials Research, Vol. 20, No. 9, 01.09.2005, p. 2474-2479.

Research output: Contribution to journalArticle

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