Effects of 3D microstructural distribution on short crack growth behavior in two bimodal Ti–6Al–4V alloys

M. Hassanipour, S. Watanabe, K. Hirayama, H. Toda, K. Uesugi, A. Takeuchi

Research output: Contribution to journalArticle

Abstract

In situ X-ray micro-tomography was performed to analyze the short crack growth in the 3D microstructure of two bimodal Ti–6Al–4V alloys with predominant α+β and α phase volume fractions. Short crack strongly interacts with the local microstructure and it grows into the predominant phase above the average microstructural fraction in each alloy. The higher volume fraction and size of the α grains in the microstructure induce crack growth with lower variations and larger deflection lengths inside the α grains. As the short crack length increases, the larger deflections left behind the crack front induces higher crack closure that decreases the crack driving forces. As a result, the short crack remains sensitive to the local microstructural features at higher lengths.

Original languageEnglish
Article number138264
JournalMaterials Science and Engineering A
Volume766
DOIs
Publication statusPublished - Oct 24 2019

All Science Journal Classification (ASJC) codes

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

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