Characterization of the deformation behaviors under uniaxial stress for bicontinuous nanoporous amorphous alloys

Abstract

The mechanical properties and deformation mechanisms of bicontinuous Cu50Zr50 amorphous alloys are investigated via molecular dynamics simulation.

Molecular dynamics simulations of cold welding of nanoporous amorphous alloys: effects of welding conditions and microstructures

“…Eventually, at ∼480 ps, numerous ligaments neck and rupture, which causes the failure of the welded nanostructure. The tensile deformation and failure mechanisms of the welded NPAA are similar to those of the pristine NPAA (see our previous study 47 ). Unexpectedly, the failure of the welded structure does not appear in the welded joint and is due to the break of the ligaments inside the left NPAA.…”

“…[43][44][45] To solve eqn (1), we utilize the finite difference method proposed by Sun et al 43,46 Readers can refer to our previous work for detailed information on the preparation of vitreous Cu 50 Zr 50 alloy and bicontinuous nanoporous structures. 24,[47][48][49] The initial cold welding system is illustrated in Fig. 1(a).…”

“…The higher surface stress makes materials deform more easily under compressive stress. 47,53,70 It can be found that the failure of the welded material is due to the rupture of ligaments of the NPAA with larger ligament size. This is in accord with the above conclusion that the failure appears in the interior of the relatively weaker NPAA.…”

Fatigue responses of metallic glass‐based stochastic network nanomaterial: Superior strain‐hardening ability

“…[23][24][25] Our recent work revealed the mechanical behaviors of NPMGs under complex loads. [26][27][28][29] The significant reduction in mass density might extremely weaken their fatigue performance. A deep understanding of the mechanical behaviors and inherent physical mechanisms of NPMGs under cyclic loading is imperative and helpful for their functional applications.…”

First-principles determination of the crystallography of the low-temperature phase for NbRu and TaRu shape memory alloys

“…Shape memory alloys (SMAs) have drawn great attention owing to their exceptional property of a shape memory effect. [1][2][3][4] The commercially developed and well-known SMA is the Ti-Ni alloy, which has been used in many applications, including medical stents, automated window openings, artificial sphincter muscles, etc. 5 However, the martensitic transformation of this alloy is below 200 1C, so it is not suitable for applications at high temperatures, such as gas turbines, rocket engines, automobiles, and nuclear reactor environments.…”