Structural gradient of plastic Fe50Ni30P13C7 bulk metallic glass

Publication date: 5 June 2019Source: Journal of Alloys and Compounds, Volume 788Author(s): Jili Wu, Lin Xu, Zhen PengAbstractIn this work, an as-cast Fe50Ni30P13C7 bulk metallic glass, which has large plastic strain (>20%) and without final fracture in compression, was systematically investigated with nanoindentation creep to uncover the structural relationships with its plastic deformation. The X-ray diffraction, differential scanning calorimetry and transmission electronic microscopy indicated that as-cast bulk metallic glass is of fully and stably amorphous nature. Three positions, from inner to outer of as-cast bulk metallic glass, were used to experimentally disclose the gradient structure in indication with gradually changes in creep compliance and retardation spectra. In a same creep holding time, the creep displacement continuously and gradually decreases from outer to inner of as-cast specimen and the creep compliance and retardation spectrum of each position indicate the outer position is more relaxed and relaxed state trends in a same subsequence with creep displacement. The work suggests that the structural gradient of as-cast Fe50Ni30P13C7 bulk metallic glass is responsible for large plasticity.Graphical abstract

Source: Journal of Alloys and Compounds - February 23, 2019 Category: Chemistry Source Type: research