Tailoring the mechanical properties of bulk metallic glasses via cooling from the supercooled liquid region

作者：Zhang, LangTing; Duan, YaJuan; Wang, YunJiang; Yang, Yong; Qiao, JiChao^*

来源：Science in China Series E-Technological Sciences, 2023, 66(1): 173-180.

DOI：10.1007/s11431-022-2237-5

• bulk metallic glass
• thermal rejuvenation
• supercooled liquid region
• mechanical relaxation
• structural heterogeneity

Structural rejuvenation is vital and attractive for modulating the energetic state and structural heterogeneity of bulk metallic glasses (BMGs). In this paper, we show that cooling a BMG from a supercooled liquid region at laboratory rates can reverse the relaxation enthalpy lost during the preceding structural relaxation. Increasing the cooling rate is beneficial for enhancing atomic mobility and dynamic mechanical relaxation intensity. Therefore, this rejuvenation methodology promotes tailoring the mechanical properties of BMGs and provides a comprehensive understanding of the rejuvenation mechanism.

• 单位
  西北工业大学; 中国科学院研究生院