Ductile metallic glasses in supercooled martensitic alloys

J. Das; K. B. Kim; W. Xu; B. C. Wei; Z. F. Zhang; W. H. Wang; S. Yi; J. Eckert

doi:10.2320/matertrans.47.2606

Ductile metallic glasses in supercooled martensitic alloys

J. Das, K. B. Kim, W. Xu, B. C. Wei, Z. F. Zhang, W. H. Wang, S. Yi, J. Eckert

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60 Scopus citations

Abstract

We report ductile bulk metallic glasses based on martensitic alloys. The slowly cooled specimens contain a mixture of parent 'austenite' and martensite phase. The slightly faster cooled bulk metallic glasses with 2-5 nm sized 'austenite'-like crystalline cluster reveal high strength and large ductility (16%). Shear bands propagate in a slither mode in this spatially inhomogeneous glassy structure and undergo considerable 'thickening' from 5-25 nm. A 'stress induced displacive transformation' is proposed to be responsible for both plasticity and work-hardening-like behavior or these 'M-Glasses'.

Original language	English
Pages (from-to)	2606-2609
Number of pages	4
Journal	Materials Transactions
Volume	47
Issue number	10
DOIs	https://doi.org/10.2320/matertrans.47.2606
State	Published - Oct 2006

Keywords

Bulk metallic glass
Deformation
Mechanical properties
Phase transformation
Solidification

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10.2320/matertrans.47.2606

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AU - Das, J.

AU - Kim, K. B.

AU - Xu, W.

AU - Wei, B. C.

AU - Zhang, Z. F.

AU - Wang, W. H.

AU - Yi, S.

AU - Eckert, J.

PY - 2006/10

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N2 - We report ductile bulk metallic glasses based on martensitic alloys. The slowly cooled specimens contain a mixture of parent 'austenite' and martensite phase. The slightly faster cooled bulk metallic glasses with 2-5 nm sized 'austenite'-like crystalline cluster reveal high strength and large ductility (16%). Shear bands propagate in a slither mode in this spatially inhomogeneous glassy structure and undergo considerable 'thickening' from 5-25 nm. A 'stress induced displacive transformation' is proposed to be responsible for both plasticity and work-hardening-like behavior or these 'M-Glasses'.

AB - We report ductile bulk metallic glasses based on martensitic alloys. The slowly cooled specimens contain a mixture of parent 'austenite' and martensite phase. The slightly faster cooled bulk metallic glasses with 2-5 nm sized 'austenite'-like crystalline cluster reveal high strength and large ductility (16%). Shear bands propagate in a slither mode in this spatially inhomogeneous glassy structure and undergo considerable 'thickening' from 5-25 nm. A 'stress induced displacive transformation' is proposed to be responsible for both plasticity and work-hardening-like behavior or these 'M-Glasses'.

KW - Bulk metallic glass

KW - Deformation

KW - Mechanical properties

KW - Phase transformation

KW - Solidification

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JO - Materials Transactions

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Ductile metallic glasses in supercooled martensitic alloys

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Keywords

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