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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 15    No. 4    August 2005

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Effect of carbon addition on microstructure and mechanical properties of Ti-based bulk metallic glass forming alloys
SUN Yu-feng(孙玉峰)1, 2, WANG Yu-ren(王育人)1, WEI Bing-chen(魏炳忱)1
LI Wei-huo(李维火)1, SHEK Chung-hong(石灿鸿)2

1. National Microgravity Laboratory, Institute of Mechanics, 
Chinese Academy of Sciences, Beijing 100080, China; 
2. Department of Physics and Materials Science, City University of Hong Kong, 
Hong Kong

Abstract: A kind of novel Ti-based composites was developed by introducing different amounts of carbon element to the Ti50Cu23Ni20Sn7 bulk metallic glass forming alloys. The thermal stability and microstructural evolution of the composites were investigated. Room temperature compression tests reveal that the composite samples with 1% and 3%(mass fraction) carbon additions have higher fracture strength and obvious plastic strain of 2195MPa, 3.1% and 1913MPa, 1.3% respectively, compared with those of the corresponding carbon-free Ti50Ni20Cu23Sn7 alloys. The deformation mechanisms of the composites with improved mechanical properties were also discussed.

 

Key words: casting; bulk metallic glasses; Vein pattern; mechanical properties; composites 

ISSN 1672-7029
CN 43-1423/U

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