Ti-Zr-Be-Fe quaternary bulk metallic glasses designed by Fe alloying  

作　　者：GONG Pan WANG Xin SHAO Yang CHEN Na YAO KeFu 

机构地区：[1]School of Materials Science and Engineering,Tsinghua University

出　　处：《Science China(Physics,Mechanics & Astronomy)》2013年第11期2090-2097,共8页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Basic Research Program of China(Grant No.2007CB613905);the National Natural Science Foundation of China(Grant Nos.51271095,51101090 and 50971073)

摘　　要：A series of Ti-Zr-Be-Fe bulk metallic glasses(BMGs)with good glass-forming ability(GFA)and high specific strength have been developed.With different alloying routes and content of Fe,it is found that these alloys exhibit different GFA and mechanical properties.The effects of Fe addition on the GFA and mechanical properties of Ti-Zr-Be alloy are systemically investigated.The possible mechanisms for the improvement or damage to the GFA by addition of Fe can be interpreted in view of the mixing enthalpy,atomic size differences and electronegativity differences of the alloys,while the mechanical properties strongly depend on the Poisson’s ratio and free volume concentration.The experimental results also show that alloying technology is an effective method to improve the GFA and mechanical properties of Ti-Zr-Be glassy alloy.A series of Ti-Zr-Be-Fe bulk metallic glasses（BMGs） with good glass-forming ability（GFA） and high specific strength have been developed. With different alloying routes and content of Fe, it is found that these alloys exhibit different GFA and mechanical properties. The effects of Fe addition on the GFA and mechanical properties of Ti-Zr-Be alloy are systemically investigated. The possible mechanisms for the improvement or damage to the GFA by addition of Fe can be interpreted in view of the mixing enthalpy, atomic size differences and electronegativity differences of the alloys, while the mechanical properties strongly depend on the Poisson＇s ratio and free volume concentration. The experimental results also show that alloying technology is an effective method to improve the GFA and mechanical properties of Ti-Zr-Be glassy alloy.

关 键 词：bulk metallic glasses alloying technique glass-forming ability mechanical properties 

分 类 号：TG139.8[一般工业技术—材料科学与工程] U465.11[金属学及工艺—合金]