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monicajing

铜虫 (小有名气)

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虫号: 601954
注册: 2008-09-13
专业: 金属非晶态、准晶和纳米晶

[交流] Philosophical Magazine Letters关于非晶压缩塑性最新文献

Highly inhomogeneous compressive plasticity in nanocrystal-toughened Zr-Cu-Ni-Al bulk metallic glass

F. O. Mar a; T. Wada a; D. V. Louzguine-Luzgin ab; A. Inoue ab

a Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
b WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan

Abstract

A Zr62Cu15.5Al10Ni12.5 bulk metallic glass with a large supercooled liquid region of 90 K, produced by copper-mould casting, exhibits a high strength of 1730 MPa and superior but highly inhomogeneous plasticity under uniaxial compression at ambient temperature. Micro-X-ray diffraction shows that compressive loading facilitates crystallization in the monolithic glassy alloy, resulting in room-temperature plasticity. The plastic deformation of the Zr62Cu15.5Al10Ni12.5 BMG may be attributed to in situ precipitation of nanocrystals during compression in heavily deformed areas.

Keywords: amorphous alloys; mechanical properties; mechanical testing

[ Last edited by hslining on 2009-9-21 at 23:26 ]

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