High tensile plasticity and strength of a CuZr-based bulk metallic glass composite. (15th January 2016)

• Record Type: Journal Article
• Authors: Ning, Zhiliang; Liang, Weizhong; Zhang, Mingxing; Li, Zongze; Sun, Haichao; Liu, Ailian; Sun, Jianfei
• Is Part Of: Materials & design. Volume 90(2016)
• Page Start: 145
• Page End: 150
• Publication Date: 2016-01-15
• Subjects: Bulk metallic glass -- Composite -- Martensitic transformation mediated plasticity -- Tensile properties; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2015.10.117
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: A new approach to improve the tensile ductility of CuZr-based bulk metallic glasses without significant reduction in high strength is reported. After doping of Nb into CuZr-based alloy, a composite was formed with a combination of high strength, large tensile plasticity and strong work-hardening effect. The addition of Nb led to a uniform distribution of single B2-CuZr phase in the glassy matrix. The optimal tensile properties were attributed to the deformation-induced martensitic transformation of the B2-CuZr phase, which in turn interacted with the glassy matrix. In addition, the drastic adiabatic heating on the fracture region also contributed to the increase in tensile plasticity. Graphical abstract: Highlights: A metallic glass composite was found to exhibit high tensile plasticity and work hardening. The addition of Nb led to a uniform distribution of B2-CuZr phase in the glassy matrix. The enhanced plasticity was attributed to the martensitic transformation of B2-CuZr phase. The interaction between martensite particle and glassy matrix further enhanced plasticity.