Effects of Thermal Exposure and Test Temperature on Structure Evolution and Hardness/Viscosity of an Iron-Based Metallic Glass

被引：27
作者：
Nouri, A. Shamimi [1 ]
Liu, Y. [1 ,2 ]
Lewandowski, J. J. [1 ]
机构：
[1] Case Western Reserve Univ, Dept Mat Sci & Engn, Cleveland, OH 44106 USA
[2] Wayne State Univ, Dept Chem, Detroit, MI 48202 USA
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2009年 / 40A卷 / 06期
关键词：
MECHANICAL-PROPERTIES; SUPERCOOLED LIQUID; VISCOSITY; FLOW; RELAXATION; PRESSURE;
D O I：
10.1007/s11661-008-9615-1
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
High-temperature microhardness testing on drop-cast ingots of fully amorphous Fe48Mo14Cr15Y2C15B6 was performed in order to determine the behavior and structure evolution of this Fe-bulk metallic glass under a variety of different test conditions. The effects of changes in test temperature on the microhardness/strength were determined over the temperature range from room temperature to 620 A degrees C. Although high (e.g., > 12 GPa) microhardness was exhibited at room temperature, significant hardness reductions were exhibited near T (g) . In addition, the effect of exposure time (up to 300 minutes) at elevated temperature on the evolution of microhardness/strength was also evaluated for selected temperatures between 25 A degrees C and 620 A degrees C. The microhardness results were complemented with X-ray diffraction (XRD), conventional transmission electron microscopy (TEM), and an in-situ heating TEM study in order to evaluate any structural evolution that could explain the large differences in hardness evolution under different test conditions.
引用
收藏
页码：1314 / 1323
页数：10
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