TY - JOUR

T1 - Cryogenic-temperature-induced structural transformation of a metallic glass

AU - Bian, Xilei

AU - Wang, Gang

AU - Wang, Quing

AU - Sun, Baoan

AU - Hussain, Ishtiaq

AU - Zhai, Qijie

AU - Mattern, Norbert

AU - Bednarčík, Jozef

AU - Eckert, Jürgen

PY - 2016/11/30

Y1 - 2016/11/30

N2 - The plasticity of metallic glasses depends largely on the atomic-scale structure. However, the details of the atomic-scale structure, which are responsible for their properties, remain to be clarified. In this study, in-situ high-energy synchrotron X-ray diffraction and strain-rate jump compression tests at different cryogenic temperatures were carried out. We show that the activation volume of flow units linearly depends on temperature in the non-serrated flow regime. A plausible atomic deformation mechanism is proposed, considering that the activated flow units mediating the plastic flow originate from the medium-range order and transit to the short-range order with decreasing temperature.

AB - The plasticity of metallic glasses depends largely on the atomic-scale structure. However, the details of the atomic-scale structure, which are responsible for their properties, remain to be clarified. In this study, in-situ high-energy synchrotron X-ray diffraction and strain-rate jump compression tests at different cryogenic temperatures were carried out. We show that the activation volume of flow units linearly depends on temperature in the non-serrated flow regime. A plausible atomic deformation mechanism is proposed, considering that the activated flow units mediating the plastic flow originate from the medium-range order and transit to the short-range order with decreasing temperature.

U2 - 10.1080/21663831.2016.1263687

DO - 10.1080/21663831.2016.1263687

M3 - Article

VL - 5.2017

SP - 284

EP - 291

JO - Materials Research Letters [Elektronische Ressource]

JF - Materials Research Letters [Elektronische Ressource]

SN - 2166-3831

IS - 4

ER -