Tensile Properties and Fracture Reliability of Melt-extracted Gd-rich Amorphous Wires

Materials Research

Hongxian Shen¹  Dawei Xing¹  Huan Wang¹  Jingshun Liu¹  Dongming Chen¹  Yanfen Liu¹  Jianfei Sun¹ 

关键词: melt-extraction;    metallic glass microwires;    tensile property;    fracture reliability;   

DOI  :  10.1590/1516-1439.325514

来源: SciELO

【 摘 要 】

Gd60Al20Co20 amorphous wires with smooth surfaces and circular cross-sections were fabricated by a melt-extraction technique. The mechanical properties of the extracted microwires were evaluated by tensile tests and their fracture reliability was estimated by using Lognormal and two- or three- parameter Weibull analysis, respectively. The microwires exhibit a tensile fracture strength ranging from ~788 to ~1196 MPa, with a mean value of 1008 MPa and a standard variance of 121 MPa. Lognormal method of statistical analysis presents that the average stress of microwires is ~1012 MPa. Weibull statistical analysis indicates that the two-parameter tensile Weibull modulus is 8.5 and the three-parameter Weibull modulus is 5.3 with a threshold value ~365 MPa for as-extracted amorphous microwires. Our results show that the extracted Gd-based wires possess excellent tensile properties and high fracture reliability, with a high potential for applications in and magnetic refrigeration.

【 授权许可】

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