Martensite in a TiAl alloy quenched from beta phase field

Research output: Contribution to journalArticlepeer-review

Authors

Colleges, School and Institutes

External organisations

  • Oxford Instruments, Halifax Road, High Wycombe, Buckinghamshire HP12 3SE, UK

Abstract

Hexagonal martensite with well-developed midribs was obtained by iced-brine quenching of Ti44Al4Nb4Hf0.1Si from the beta phase field. Crystallographic characterisation shows great resemblances of the martensite in this alloy to the lenticular martensite in Fe–Ni alloys in the morphology and substructures of martensite plates. It also bears similarities with the martensite in titanium and its alloys in habit planes and orientation relationship with parent phase. Martensitic transformation under the conditions employed in this work was incomplete and the remaining beta phase after martensitic transformation, thus, underwent diffusional beta-to-alpha transformation or massive transformation, depending on the local circumstances.

Details

Original languageEnglish
Pages (from-to)87-95
JournalIntermetallics
Volume56
Early online date3 Oct 2014
Publication statusPublished - Jan 2015

Keywords

  • Titanium aluminides, based on TiAl, Martensitic transformation, Phase transformation, Microstructure, Electron backscatter diffraction, Electron microscopy, scanning