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MELT OVERHEATING METHOD FOR IMPROVED TOUGHNESS AND GLASS-FORMING ABILITY OF METALLIC GLASSES
MELT OVERHEATING METHOD FOR IMPROVED TOUGHNESS AND GLASS-FORMING ABILITY OF METALLIC GLASSES
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机译:改善金属玻璃的韧性和玻璃形成能力的熔体过热方法
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摘要
A method of forming a bulk metallic glass is provided. The method includes overheating the alloy melt to a temperature above a threshold temperature, Ttough, associated with the metallic glass demonstrating substantial improvement in toughness compared to the toughness demonstrated in the absence of overheating the melt above Tliquidus, and another threshold temperature, TGFA, associated with the metallic glass demonstrating substantial improvement in glass-forming ability compared to the glass-forming ability demonstrated in the absence of overheating the melt above Tliquidus. After overheating the alloy melt to above Ttough and TGFA, the melt may be cooled and equilibrated to an intermediate temperature below both Ttough and TGFA but above Tliquidus, and subsequently quenched at a high enough rate to form a bulk metallic glass.
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