Structural ordering governs stiffness and ductile-to-brittle transition in Al–Li alloys

Abstract

The trade-off of stiffness and ductility of metals has long plagued materials scientists. To address this issue, atomic structure designs of short-range ordering (SRO) to sub-nanometer and nanometer scales have received much interest in tailoring the atomic environment and electronic interaction between solute and solvent atoms. Taking an example of Al-Li alloy with high specific stiffness and reverse correlation of Young's modulus and melting point, in this work, we investigate the SRO-dependent stiffness and intrinsic ductile-brittle properties by performing a full-configuration strategy containing various structural ordering features. It suggests the short-range ordered arrangement of Li atoms can effectively enhance the stiffness while keeping ductility, playing a hydrostatic pressure-like role. Our findings present fundamental knowledge to enable high stiffness and ductility for solvent phases with low modulus through designing local short-range ordered cluster structures.

A Highly Efficient and Selective Glycine Based Schiff Base Fluorescent Probe for Dual Sensing of Zn(II) and Cu(II) and its Antibacterial Activity and BSA Interaction Studies

“…This configuration resembles an AND gate with an inverter applied to one of its inputs. Thus the modulation of emission at 438 nm in response to Zn 2+ and Cu 2+ inputs, incorporating an inverter, effectively emulates a monomolecular circuit that exhibits an INHIBIT logic function (Figure 9) at the molecular scale [10,32] …”

“…Similarly, large intake of zinc‐containing supplements or medication can lead to various problems including metabolic and neurological disorder, kidney and liver damage [9] . Hence, devising a selective and sensitive tool to monitor these metal ions has become relevant in recent years [10,11] . Therefore, it is crucial to have chemosensor capable of detecting both the metal ions utilizing single method and provide distinct responses for each ion [12,13] .…”

“…The presence of the biogenic moiety viz., coumarin, and amino acids enhanced the biological property of Schiff base compounds [22] . Moreover, reports in the literature indicated that the Schiff base derived from amino acid are pertinent in different sphere of applications in biology, as well as, material science [10,23] . In the present case, we have chosen alkoxy chain appended mesogenic salicylaldimine based Schiff base ligand derived from amino acid to explore the chemosensitivity, as well as its biological activity.…”

Unexpected nucleation mechanism of T1 precipitates by Eshelby inclusion with unstable stacking faults

“…As one of the major strengthening mechanisms in Al‐Li alloys, precipitation strengthening is of great interests to many researchers [8–12] . Among them, the nano T 1 precipitate with high length/diameter ratios is the most important and has been well‐studied in the third and fourth‐generation Al‐Li alloys.…”