Molecular dynamics study of plasticity in Al-Cu alloy nanopillar due to compressive loading

TL;DR

This study uses molecular dynamics simulations to explore how compressive loading affects the plasticity of Al-Cu alloy nanopillars, focusing on crystal orientation and alloying percentage.

Contribution

It provides new insights into the influence of crystal orientation and Cu content on the mechanical response of Al-Cu alloy nanopillars under compression.

Findings

Highest first yielding strength along <110> direction

Maximum strain along <001> direction

Dislocation interactions explain stress-strain behavior

Abstract

In this paper, compressive loading effects on the plasticity of Al-Cu alloy varying the crystal orientation of Al and alloying element (Cu) percentage are investigated using molecular dynamics approach. The alloying percentage of Cu are varied up to 10% in <001>, <110> and <111> crystal loading direction of Al. Our results indicate that the alloy nanopillar has highest first yielding strength and strain along <110> and <001> direction, respectively. Further, the dislocation density and dislocation interaction are studied to explain the compressive stress strain behavior of the alloy nanopillar.