Effects of lamellar thickness on misfit dislocation introduction and mechanical properties of γ/α2 nano-lamellar TiAl alloys

K. Maruyama, A. Tabata, Y. Toriyama, M. Suzuki, K. Yoshimi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Stress-strain behavior of lamellar Ti-38Al-3Zr and -3Nb alloys with average lamellar thickness ranging from 10 to 1000 nm were studied at room temperature. Their yield stresses decrease from a high value of coherent lamellar structures to a low value after introducing misfit dislocations onto lamellar boundaries. Their strain hardening rates increase with decreasing lamellar thickness, and then drop to a low level when the misfit dislocations become absent. There is critical thickness of γ lamellae for introduction of misfit dislocations. The thickness decreases with increasing lattice misfit between the constituent phases.

Original languageEnglish
Article number012101
JournalJournal of Physics: Conference Series
Volume240
DOIs
Publication statusPublished - 2010

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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