Adiabatic shear localization in nanostructured face centered cubic metals under uniaxial compression

作者：Li, Jianguo; Suo, Tao^*; Huang, Chongxiang^*; Li, Yulong; Wang, Hongtao; Liu, Jiabin

来源：Materials and Design, 2016, 105: 262-267.

DOI：10.1016/j.matdes.2016.05.081

• Nanostructured
• FCC structure
• Hopkinson bar
• Adiabatic shear band

In this work, the dynamic behavior of nanostructured Cu-11.14% Al alloy with face-centered cubic (FCC) structure has been investigated using split Hopkinson pressure bar. At high strain rate uniaxial compression (strain rate similar to 4 x 10(3) s(-1)), a sharp stress collapse was observed in the plastic regime of the specimens. Post-loading examinations verified the appearance of adiabatic shear band (ASB), which has rarely been observed in FCC metals under uniaxial loading. Adiabatic heating within the ASBs has led to recrystallization, resulting in remarkably refined and defect-free nanocrystalline grains. The occurrence of ASBs in such an FCC alloy can be explained based on established mechanistic models.

• 出版日期2016-9-5
• 单位西北工业大学; 四川大学; 浙江大学