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monicajing铜虫 (小有名气)
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Philosophical Magazine Letters关于非晶压缩塑性最新文献
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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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2楼2009-03-26 09:23:12