Preparation and Compression Properties of Fe--C--Si--B--P--Cr--Mo--Al Bulk Metallic Glass
LI Hongxiang; YI Seonghoon; ZHANG Xinfang; WANG Xiaodong
Nanostructured Materials Laboratory;Department of materials science and Metallurgy;Kyungpook National University;1370 Sankyuk-dong; Buk-gu; Daegu; 702-701; Korea
Cite this article:
LI Hongxiang; YI Seonghoon; ZHANG Xinfang; WANG Xiaodong. Preparation and Compression Properties of Fe--C--Si--B--P--Cr--Mo--Al Bulk Metallic Glass. Acta Metall Sin, 2006, 42(7): 777-780 .
Abstract A new cast Fe-based bulk metallic glass Fe69C7.0Si3.5B4.8P9.6Cr2.1Mo2.0Al2.0 (at%) with maximum thickness of 5mm in diameter was successfully prepared by copper mold casting technique using industrial raw materials. The thermal stability and crystallization behavior were investigated by differential scanning calorimetry (DSC), differential thermal analysis (DTA) and x-ray diffraction (XRD). The results showed that the glass transition temperature Tg, supercooled liquid region △Tx (△T x = T x -Tg), reduced glass transition temperature Trg (Tg/Tl) and glass-forming ability parameter g (Tx/(Tg+Tl)) were measured to be 784K, 27K, 0.601, 0.388, respectively. The double-stage crystallization process of Fe69C7.0Si3.5B4.8P9.6Cr2.1Mo2.0Al2.0 amorphous ribbons is due to the first precipitation of single a-Fe phase followed by the precipitation of Fe3C, Fe2P, FeB, Fe2B phases simultaneously. The bulk glassy alloy exhibits very high fracture strength of about 3870MPa, Young’s modulus (E) of 177GPa, elastic strain(εe) of 0.021 and plastic strain (εp) of 0.0029.
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