Determination of the cyclic-tension fatigue of extruded pure magnesium using multiple ultrasonic waves

Hideki Yamagishi, Mikio Fukuhara, Akihiko Chiba

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


Three acoustic techniques, namely longitudinal wave reflection, vertically-polarized shear wave (SV) reflection, and horizontally polarized shear wave (SH) transmission methods, were used to assess the cyclic-tension fatigue of an extruded pure magnesium. The acoustic velocities were measured by the reflection methods, and found to decrease considerably at the beginning of the fatigue. This suggests that void defects formed at grain boundaries (Cable creep). Decrease in the elastic moduli and increase in the internal frictions revealed decrease in the mechanical and increase in the viscoelastic properties during the fatigue progress, respectively. For SH transmission method, acoustic parameters such as propagation time, amplitude and logarithmic damping ratio were strongly affected by detouring of acoustic waves, accompanied by variation in the residual stress caused by acoustoelasticity, in comparison with the reflection methods. These acoustic results were determined using OM, SEM, Vickers hardness tester, surface roughness tester and XRD.

Original languageEnglish
Pages (from-to)1255-1263
Number of pages9
JournalMaterials Transactions
Issue number7
Publication statusPublished - 2010 Jul


  • Coble creep
  • Fatigue
  • Multiple ultrasonic waves
  • Nondestructive evaluation
  • Pure magnesium

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


Dive into the research topics of 'Determination of the cyclic-tension fatigue of extruded pure magnesium using multiple ultrasonic waves'. Together they form a unique fingerprint.

Cite this