Journal
INTERMETALLICS
Volume 139, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2021.107365
Keywords
Bulk metallic glass; Natural aging; Relaxation behavior; Mechanical property
Categories
Funding
- Major agricultural application technology innovation projects of Shandong Province [SD2019NJ017]
- Science and Technology Development Plan of Taian, China [2019GX024]
- Natural Science Foundation of Shandong Province, China [ZR2017BEM017]
- Project of Higher Educational Science and Technology Program in Shandong Province, China [J18KA027]
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The study investigated the changes in La-based BMG during 8 years of natural aging, revealing that natural aging leads to atomic structure relaxation, affecting the mechanical properties of the material.
Natural aging, which is the spontaneous temporal evolution of meta-stable systems, is a great task in amorphous materials. In this work, La62Al14(Cus(5/6)Ag(1/6))(14)(Ni1/2Co1/2)(10) BMGs with the same master alloy was prepared 8 years ago and at present. The effect of natural aging on the relaxation behavior and mechanical property of the La-based BMG was studied. Experimental results based on dynamic mechanical analysis and differential scanning calorimetry showed that natural aging for 8 years caused the atomic configuration to relax from a meta-stable state to a relatively more stable state, and the crystallization characteristic was also affected by natural aging. The results of compression testing indicated that the plasticity of the La-based BMG would be reduced, as a result of structural relaxation caused by natural aging.
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