EFFECT OF SUBSTRUCTURE FORMED IN PRIOR beta GRAIN ON CRACK INITIATION AND PROPAGATION TOUGHNESS OF Ti-6 Al-2 Sn-4 Zr-6 Mo ALLOY.

Mitsuo Niinomi, Ikuhiro Inagaki, Toshiro Kobayashi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The instrumented Charpy impact test and static and dynamic fracture toughness tests were carried out on an alloy in which the prior beta grain size was changed by heat treatment. The elongation, crack initiation and propagation toughness increased with a slight decrease in strength in specimens with increased prior beta grain size with prolonged solution treatment time. The increase in crack initiation toughness was mainly caused by an increase in the widmanstaetten a lath. The increase in crack propagation toughness was caused by deflection of the crack pass. The intersubcolony spacing decreased with an increase in alpha nucleation during diffusion-controlled alpha yields beta transformation. In such situation, alpha nucleated in the interior of the beta grain and increased with the introduction of strain.

Original languageEnglish
Pages (from-to)543-550
Number of pages8
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume74
Issue number3
DOIs
Publication statusPublished - 1988

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'EFFECT OF SUBSTRUCTURE FORMED IN PRIOR beta GRAIN ON CRACK INITIATION AND PROPAGATION TOUGHNESS OF Ti-6 Al-2 Sn-4 Zr-6 Mo ALLOY.'. Together they form a unique fingerprint.

Cite this