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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Viscous flow and thermoplastic forming ability of a Zr-based bulk metallic glass composite with Ta dispersoids
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Viscous flow and thermoplastic forming ability of a Zr-based bulk metallic glass composite with Ta dispersoids

机译：含Ta分散体的Zr基块状金属玻璃复合材料的粘滞流动和热塑性成形能力

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摘要

The thermoplastic deformation behavior of a Zr_(47.3)Cu_(32)Al_8Ag_8Ta_4Si_(0.7)-based bulk metallic glass composite (BMGC) is studied using thermal mechanical analyzer (TMA) and high temperature compression test in the supercooled liquid (SCL) region. The deformation behavior of the Zr_(47.3)Cu_(32_Al_8Ag_8Ta_4Si_(0.7)-based BMGC rod is investigated usingTMA under compression at different strain rates (5 x 10~(-2) to 5 x 10~(-1) s~(-1)) and at different temperatures above the onset temperature of viscous-flow (～740 to 764 K) in the SCL region. It is observed that, at a constant strain rate of 5 x 10~(-2) s~(-1), the flow stress decreases with increasing temperature and reaches a relatively low value about 76 MPa at 764 K. In parallel, the value of flow stress increases with increasing strain rate at the same testing temperature. A satisfactory thermoplastic forming ability of the Zr_(47.3)Cu_(32_Al_8Ag_8Ta_4Si_(0.7)-based BMGC in the SCL region is demonstrated by imprinting the hologram pattern.
机译：使用热机械分析仪（TMA）和高温压缩试验（SCL）对高温Zr_（47.3）Cu_（32）Al_8Ag_8Ta_4Si_（0.7）基大块金属玻璃复合材料（BMGC）的热塑性变形行为进行了研究。使用TMA在不同应变率（5 x 10〜（-2）至5 x 10〜（-1）s〜（-）的压缩下研究Zr_（47.3）Cu_（32_Al_8Ag_8Ta_4Si_（0.7）基BMGC棒的变形行为1））并在高于SCL区域粘性流起始温度（〜740至764 K）的不同温度下观察到，在5 x 10〜（-2）s〜（-的恒定应变率下1），流变应力随着温度的升高而降低，在764 K时达到较低的约76 MPa;同时，在相同的测试温度下，流变应力的值随着应变率的增加而增加。通过刻印全息图图案来证明SCL区域中的（47.3）Cu_（32_Al_8Ag_8Ta_4Si_（0.7）基BMGC。

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