Metallic Glass Structures for Mechanical-Energy-Dissipation Purpose: A Review

S.H Chen,K.C Chan,G Wang,H.Y Cheng

doi:10.3390/met8090689

Abstract

Metallic glasses (MGs), a new class of advanced structural materials with extraordinary mechanical properties, such as high strength approaching the theoretical value and an elastic limit several times larger than the conventional metals, are being used to develop cellular structures with excellent mechanical-energy-dissipation performance. In this paper, the research progress on the development of MG structures for energy-dissipation applications is reviewed, including MG foams, MG honeycombs, cellular MGs with macroscopic cellular structures, microscopic MG lattice structures and kirigami MG structures. MG structures not only have high plastic energy absorption capacity superior to conventional cellular metals, but also demonstrate great potential for storing the elastic energy during cyclic loading. The deformation behavior as well as the mechanisms for the excellent energy-dissipation performance of varying kinds MG structures is compared and discussed. Suggestions on the future development/optimization of MG structures for enhanced energy-dissipation performance are proposed, which can be helpful for exploring the widespread structural-application of MGs.

Highlights

Since being synthesized in the 1960s, metallic glasses (MGs) are known to have attractive mechanical properties, superior to their crystalline counterparts, and are considered ready for widespread practical applications as structural materials [1]
With relatively-higher strength, MGs are considered an ideal replacement of conventional crystalline metals for synthesizing cellular structures with enhanced energy-absorption performance, such as MG foams [7,8], MG honeycombs [9,10,11] and cellular MGs with macroscopic cellular structures [12,13]
The corresponding energy-dissipation mechanisms of the MG honeycombs have been found to result from the large plasticity of the struts at relatively-smaller scales [9,10]

Summary

Introduction

Since being synthesized in the 1960s, metallic glasses (MGs) are known to have attractive mechanical properties, superior to their crystalline counterparts, and are considered ready for widespread practical applications as structural materials [1]. With relatively-higher strength, MGs are considered an ideal replacement of conventional crystalline metals for synthesizing cellular structures with enhanced energy-absorption performance, such as MG foams [7,8], MG honeycombs [9,10,11] and cellular MGs with macroscopic cellular structures [12,13]. The corresponding energy-dissipation mechanisms of the MG honeycombs have been found to result from the large plasticity of the struts at relatively-smaller scales [9,10]. On the other hand, inspired by the development of metamaterials, Metals 2018, 8, 689; doi:10.3390/met8090689 www.mdpi.com/journal/metals

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