力学性能的影响
(1. 兰州理工大学 甘肃有色金属新材料省部共建国家重点实验室，兰州 730050；
2. 北京工业大学 国家教育部功能材料重点实验室，北京 100022)
摘 要: 采用铜模吸铸法将Ti元素添加到Zr65Cu17.5Al7.5Ni10非晶合金中，制备得到直径为3 mm的大块非晶合金。采用X 射线衍射(XRD)、扫描电子显微镜(SEM)、示差扫描量热仪(DSC)和微机控制电子式万能试验机等研究半固态处理对Zr60Cu17.5Al7.5Ni10Ti5大块非晶合金的微观组织结构、非晶形成能力、压缩力学性能以及断口形貌的影响。结果表明：半固态处理技术对非晶合金材料的组织结构和力学性能有很大的影响，能够提高非晶合金的强度和塑性；半固态下Zr60Cu17.5Al7.5Ni10Ti5表现出较好的非晶形成能力，表征非晶形成能力的参数Trg为0.618 9，过冷液相区∆Tx达到40 K；且当吸铸电压为7 kV时试样的塑性最好，为1.94%，强度为1 487.411 MPa。
关键字: 非晶合金；半固态处理；非晶形成能力；吸铸电压；力学性能
mechanical properties of Zr60Cu17.5Al7.5Ni10Ti5 bulk amorphous alloys
（1. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology,
Lanzhou 730050, China;
2. The Key Laboratory of Advanced Functional Materials, Ministry of Education,
Beijing University of Technology, Beijing 100022, China）
Abstract:A bulk amorphous alloy with diameter of 3 mm was prepared by water-cooled copper mold method through adding Ti element into the matrix of Zr60Cu17.5Al7.5Ni10Ti5. X-ray diffractometer (XRD), scanning electron microscope (SEM), differential scanning calorimeter (DSC) and micro-electric universal testing machine were employed to investigate the effect of semi-solid technology on the microstructure, glass forming ability, compression mechanical properties and facture surface of Zr60Cu17.5Al7.5Ni10Ti5 bulk amorphous alloy. The results indicate that the semi-solid technology markedly affects the structure and mechanical properties of the amorphous material, and improves the intensity and plastic of the alloy. The semi-solid Zr60Cu17.5Al7.5Ni10Ti5 exhibits an excellent glass forming ability, with Trg of 0.618 9 and supercooled liquid region (∆Tx) of 40 K. When the suction-casting voltage is 7 kV, the sample with the best plastic of 1.94%, strength of 1 487.411 MPa is obtained.
Key words: bulk metallic glass; semi-solid processing; glass forming ability; suction-casting voltage; mechanical properties
