Effect of germanium and silicon additions on the mechanical properties of a near-α titanium alloy

T. Kitashima, K. S. Suresh, Y. Yamabe-Mitarai

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The effect of Germanium (Ge) addition and simultaneous addition of Ge and Silicon (Si) on the tensile properties, impact toughness, and fracture behavior of the near-α alloy Ti-5Al-2Sn-4Zr-2Mo has been investigated at room temperature and at 650. °C. Addition of Ge monotonically increases the 0.2% yield stress (YS) and ultimate tensile stress (UTS) at both temperatures, and increases the rupture elongation at 650. °C; however, the Charpy impact toughness at both temperatures decreased. At 650. °C, this alloy ruptured in a hybrid manner, showing cracking at the germanide precipitates and plastic deformation in the surrounding matrix forming equiaxed dimples. The effect of simultaneous addition of 1. wt% Ge and 0.1. wt% Si on the mechanical properties is also discussed in relation to the effect of precipitate volume fraction and solid solution strengthening.

Original languageEnglish
Pages (from-to)212-218
Number of pages7
JournalMaterials Science and Engineering A
Volume597
DOIs
Publication statusPublished - 2014 Mar 12
Externally publishedYes

Keywords

  • Germanium
  • Mechanical property
  • Phase transformation
  • Precipitation
  • Titanium alloys

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Effect of germanium and silicon additions on the mechanical properties of a near-α titanium alloy'. Together they form a unique fingerprint.

Cite this