Mg-based metallic glass matrix composite with in situ porous titanium dispersoids by dealloying in metallic melt

Hideki Oka; Wei Guo; Takeshi Wada; Hidemi Kato

doi:10.1016/j.msea.2013.06.015

Mg-based metallic glass matrix composite with in situ porous titanium dispersoids by dealloying in metallic melt

Hideki Oka, Wei Guo, Takeshi Wada, Hidemi Kato

Materials Development Division

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

A Mg3Cu3Gd bulk metallic glass matrix composite with porous α-Ti dispersoids was prepared by dealloying in a metallic melt. The in situ formed α-Ti dispersoids had a pore-size of ~500nm, which was imparted from the Ti₂Cu precipitate in the prealloy. Pore size was therefore controllable through the cooling rate of the prealloy preparation. Plasticity was not improved apparently, however the maximum fracture stress under four point bending mode increased from 217MPa for the monolithic counterpart to 387MPa. This was due to the optimal relationship where dispersoid size (L)≈dispersoid interval distance (S)≈process zone size (R_p). This was achieved locally within and around the porous Ti dispersoids, and helped improve the toughness and ductility.

Original language	English
Pages (from-to)	76-83
Number of pages	8
Journal	Materials Science and Engineering A
Volume	582
DOIs	https://doi.org/10.1016/j.msea.2013.06.015
Publication status	Published - 2013 Oct

Keywords

Bulk metallic glass
Composite material
Dealloying
Mg-based alloy
Porous metal

ASJC Scopus subject areas

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

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10.1016/j.msea.2013.06.015

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@article{691704c6b4e945dea4403b19f37a0592,

title = "Mg-based metallic glass matrix composite with in situ porous titanium dispersoids by dealloying in metallic melt",

abstract = "A Mg3Cu3Gd bulk metallic glass matrix composite with porous α-Ti dispersoids was prepared by dealloying in a metallic melt. The in situ formed α-Ti dispersoids had a pore-size of ~500nm, which was imparted from the Ti2Cu precipitate in the prealloy. Pore size was therefore controllable through the cooling rate of the prealloy preparation. Plasticity was not improved apparently, however the maximum fracture stress under four point bending mode increased from 217MPa for the monolithic counterpart to 387MPa. This was due to the optimal relationship where dispersoid size (L)≈dispersoid interval distance (S)≈process zone size (Rp). This was achieved locally within and around the porous Ti dispersoids, and helped improve the toughness and ductility.",

keywords = "Bulk metallic glass, Composite material, Dealloying, Mg-based alloy, Porous metal",

author = "Hideki Oka and Wei Guo and Takeshi Wada and Hidemi Kato",

note = "Funding Information: This work was financially supported by a Grant-in-Aid for Scientific Research, Japan Society for the Promotion of Science No. 23656422 , and by Program Research, Center for Interdisciplinary Research, Tohoku University .",

year = "2013",

month = oct,

doi = "10.1016/j.msea.2013.06.015",

language = "English",

volume = "582",

pages = "76--83",

journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",

issn = "0921-5093",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Mg-based metallic glass matrix composite with in situ porous titanium dispersoids by dealloying in metallic melt

AU - Oka, Hideki

AU - Guo, Wei

AU - Wada, Takeshi

AU - Kato, Hidemi

N1 - Funding Information: This work was financially supported by a Grant-in-Aid for Scientific Research, Japan Society for the Promotion of Science No. 23656422 , and by Program Research, Center for Interdisciplinary Research, Tohoku University .

PY - 2013/10

Y1 - 2013/10

N2 - A Mg3Cu3Gd bulk metallic glass matrix composite with porous α-Ti dispersoids was prepared by dealloying in a metallic melt. The in situ formed α-Ti dispersoids had a pore-size of ~500nm, which was imparted from the Ti2Cu precipitate in the prealloy. Pore size was therefore controllable through the cooling rate of the prealloy preparation. Plasticity was not improved apparently, however the maximum fracture stress under four point bending mode increased from 217MPa for the monolithic counterpart to 387MPa. This was due to the optimal relationship where dispersoid size (L)≈dispersoid interval distance (S)≈process zone size (Rp). This was achieved locally within and around the porous Ti dispersoids, and helped improve the toughness and ductility.

AB - A Mg3Cu3Gd bulk metallic glass matrix composite with porous α-Ti dispersoids was prepared by dealloying in a metallic melt. The in situ formed α-Ti dispersoids had a pore-size of ~500nm, which was imparted from the Ti2Cu precipitate in the prealloy. Pore size was therefore controllable through the cooling rate of the prealloy preparation. Plasticity was not improved apparently, however the maximum fracture stress under four point bending mode increased from 217MPa for the monolithic counterpart to 387MPa. This was due to the optimal relationship where dispersoid size (L)≈dispersoid interval distance (S)≈process zone size (Rp). This was achieved locally within and around the porous Ti dispersoids, and helped improve the toughness and ductility.

KW - Bulk metallic glass

KW - Composite material

KW - Dealloying

KW - Mg-based alloy

KW - Porous metal

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U2 - 10.1016/j.msea.2013.06.015

DO - 10.1016/j.msea.2013.06.015

M3 - Article

AN - SCOPUS:84880183742

SN - 0921-5093

VL - 582

SP - 76

EP - 83

JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

ER -

Mg-based metallic glass matrix composite with in situ porous titanium dispersoids by dealloying in metallic melt

Abstract

Keywords

ASJC Scopus subject areas

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