A Maxwell-pulse constitutive model of Zr(55)Cu(30)Al(10)Ni(5) bulk metallic glasses in supercooled liquid region

作者：Wang Xin yun^*; Tang Na; Zheng Zhi zhen; Tang Ying ying; Li Jian jun; Liu Lin

来源：Journal of Alloys and Compounds, 2011, 509(5): 2518-2522.

DOI：10.1016/j.jallcom.2010.11.070

• Bulk metallic glass
• Modeling
• Stress overshoot
• Micro-backward extrusion
• Finite element analysis

Stress overshoot related to the variation in free volume is an important phenomenon in cylinder compression tests of bulk metallic glasses (BMGs). A Maxwell-pulse constitutive model was proposed according to the overshoot of Zr(55)Cu(30)Al(10)Ni(5) BMG in the supercooled liquid region (SCLR). Compression experiments and the constitutive model showed good agreement, especially with regard to the stress overshoot phenomenon. Furthermore, micro-backward extrusion experiments and numerical simulation were conducted in SCLR. The results showed that the constitutive model describes the mechanical behavior of the BMG well.

• 出版日期2011-2-3
• 单位华中科技大学