Glass forming ability of Zr-and Fe-based alloys at quenching from melts

Glass forming ability of Zr-and Fe-based alloys at quenching from melts

The master alloy ingots(MAI)with the nominal composition Zr52.5 Ti5Cu17.9 Ni14.6Al10 and Fe61Co7Zr10Mo5W2B15(at%)were prepared by arc-melting in Ti-gettered Ar atmosphere.The Zr-based buttons of 6 mm and 9 mm in diameter were fully amorphous,but those of 13 mm in diameter experienced crystallization...

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Veröffentlicht in:Journal of Harbin Institute of Technology 2002-06, Vol.9 (2), p.196-200
1. Verfasser: SUN Jian-fei GAO Yu-lai SHEN Jun WANG Gang XING Da-wei ZHOU Bi-de
Format: Artikel
Sprache:eng
Schlagworte:
ability
alloy
amorphous
bulk
forming
glass
liquid
metallic
overheating
region
supercooled
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Zusammenfassung:The master alloy ingots(MAI)with the nominal composition Zr52.5 Ti5Cu17.9 Ni14.6Al10 and Fe61Co7Zr10Mo5W2B15(at%)were prepared by arc-melting in Ti-gettered Ar atmosphere.The Zr-based buttons of 6 mm and 9 mm in diameter were fully amorphous,but those of 13 mm in diameter experienced crystallization.The glass forming ability(GFA)of Fe-based alloys was relatively lower,and the buttons obtained were fully crystallized.The microhardness of the Zr-based buttons was about 500(Hv),and the Fe-based rod obtained by injection technique exhibited a high Vickers hardness of 1329.In addition,an amorphous-crystalline transition layers were observed in both the buttons and the rods.
ISSN:1005-9113