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| 1 | Ti-Zr-Be-Fe quaternary bulk metallic glasses designed by Fe alloying显示文摘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. | GONG Pan WANG Xin SHAO Yang CHEN Na YAO KeFu | 2013 | Science China(Physics,Mechanics & Astronomy)2013，56，11： | 6 |
| 2 | 基于“团簇加连接原子”模型设计的Ni_(3)Al基金属间化合物的显微组织和力学性能显示文摘Ni_(3)Al金属间化合物的室温脆性问题极大地限制了其应用。通过“团簇加连接原子”模型对Ni_(3)Al金属间化合物进行成分和结构解析及成分设计,通过Co、Fe部分取代团簇壳层上的Ni,Ti部分取代连接原子Al,设计出六种合金。并对其显微组织及力学性能进行了表征。结果表明:六种合金的显微组织均由NiAl相(γ′相)、NiAl相(BCC)和少量共晶析出的第三相所构成,且通过TEM分析证实了基体为Ni_(3)Al相。相比于Ni_(3)Al金属间化合物,合金的室温强度、硬度和塑性均有大幅度的提升。分析其原因是由于基体为Ni_(3)Al相,保持了合金基体的强度和硬度,当Ni_(3)Al基体中析出少量的BCC相时,进一步提高合金的强度和硬度,而当BCC含量过高时,合金的强度和硬度降低,塑性升高。 | 刘林 许雅南 田权伟 滕宗延 徐朝晖 王轶农 | 2022 | 钢铁钒钛2022，43，5： | 0 |
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