Deformation mechanisms underlying tension-compression asymmetry in magnesium alloy ZK60 revealed by acoustic emission monitoring

Alexei Vinogradov, Dmitry Orlov, Alexei Danyuk, Yuri Estrin

Research output: Contribution to journalArticlepeer-review

Abstract

This study is aimed at clarifying the microscopic mechanisms that determine a pronounced asymmetry of plastic deformation with respect to tension and compression in magnesium alloys, even having a random texture. The specific object of the present investigation is the Mg-Zn-Zr alloy ZK60. The mechanisms in question are based on a synergistic interplay between dislocation slip and deformation twinning. The details of the relative contributions of these principal processes were studied by monitoring the acoustic emission (AE) underpinned by robust AE signal classification developed recently. Through the cluster analysis of AE time series in spectral domain, the sequences of the predominant deformation mechanisms were identified for early stages of cyclic loading with opposite directions of the first loading excursion into tension or compression.

Original languageEnglish
Pages (from-to)243-251
Number of pages9
Journal Materials Science and Engineering A
Volume621
DOIs
Publication statusPublished - 2015 Jan 5
Externally publishedYes

Subject classification (UKÄ)

  • Materials Engineering

Free keywords

  • Acoustic emission
  • Deformation mechanisms
  • Mechanical properties
  • Signal categorization
  • Wrought magnesium alloys

Fingerprint

Dive into the research topics of 'Deformation mechanisms underlying tension-compression asymmetry in magnesium alloy ZK60 revealed by acoustic emission monitoring'. Together they form a unique fingerprint.

Cite this