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W絲增強含Co鋯基非晶復合材料的變形行為與力學性能
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TB383

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國家重點基礎(chǔ)研究發(fā)展規(guī)劃 國家自然科學基金資助(5027406和G2000067201)


Deformation Behaviores and Mechanical Properties of Tungsten Fiber Reinforced Zr-Based Bulk Metallic Amorphous Matrix Composite Containing Co
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    摘要:

    采用滲流鑄造方法制備了W絲增強Zr-Ti-Cu-Be-Co非晶基復合材料，研究了復合材料的變形方式及力學性能。結(jié)果表明：W絲增強復合材料在準靜態(tài)壓縮條件下不僅保持了Zr-Ti-Cu-Be-Co非晶基體高的強度，而且表現(xiàn)出很高的塑性。與純非晶相比提高了900％。隨著W絲體積分數(shù)的增加，復合材料的變形方式由剪切滑移轉(zhuǎn)變?yōu)閃絲的彎曲和劈裂。復合材料的宏觀塑性變形量與壓縮過程中產(chǎn)生的剪切帶數(shù)量成正比。W絲對非晶基體單一剪切帶滑移的阻礙，促進多重剪切帶的產(chǎn)生和擴展是復合材料產(chǎn)生大量塑性變形的微觀機理。

    Abstract:

    Tungsten fiber reinforced Zr-Ti-Cu-Be-Co bulk metallic amorphous matrix composite was fabricated by a pressure infiltrating cast method. The deformation behaviors and mechanical properties were investigated. The results indicated that Tungsten fiber reinforced bulk metallic glass matrix composite not only holds high strength of pure Zr-Ti-Cu-Be-Co bulk metallic glass, but also exhibits the strain of more than 900% higher than those of pure Zr-Ti-Cu-Be-Co bulk metallic glass. The compressive failure mode of the composite shifts from shear to the localized fiber buckling and tilting with the increase of the volume fraction of tungsten fibers. The increase in compressive toughness comes from the fibers restricting shear band propagation, promoting the generation of multiple shear bands.

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武曉峰 張海峰 胡壯麒. W絲增強含Co鋯基非晶復合材料的變形行為與力學性能[J].稀有金屬材料與工程,2005,34(6):863~866.[Wu Xiaofeng, Zhang Haifeng, Hu Zhuangqi. Deformation Behaviores and Mechanical Properties of Tungsten Fiber Reinforced Zr-Based Bulk Metallic Amorphous Matrix Composite Containing Co[J]. Rare Metal Materials and Engineering,2005,34(6):863~866.]
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  • 最后修改日期:2003-11-27
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