Quantitative analysis of alpha morphology changes of Ti-17 alloy with a lamellar starting microstructure

Wei Dong Zeng, Yi Gang Zhou, Jian Hua Zhou, Xiao Ying Wang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The microstructural changes of alpha morphology in Ti-17 alloy with an initial lamellar microstructure were examined quantitatively using image analysis software. The alpha morphology changes at different locations (center, edge, 0.5R) of the cakes deformed to different strain level were measured by Feret ratio and related to the imposed strain estimated using finite element analysis. It was found that the modification of alpha morphology depended strongly on the forging strains and the locations in the cakes. The distribution curve of Feret ratio was characterized by a single peak at Feret ratio between 1.5-2.5. These peak values increased with the increase in the height reductions. Increasing forging strains caused the high-Feret-ratio lamellae to decrease but low-Feret-ratio alpha to increase noticeably. The average strains for initiation of globalization were of the order of 0.4 and those for completion were of the order of 1.0, which was lower than conventional α+β titanium alloys.

Original languageEnglish
Title of host publication4th International Conference Organised by the CAST CRC, on Behalf of the Global Light Metals Alliance
PublisherTrans Tech Publications Ltd
Pages113-116
Number of pages4
ISBN (Print)0878493271, 9780878493272
DOIs
StatePublished - 2009
Event4th International Conference Organised by the CAST CRC, on Behalf of the Global Light Metals Alliance - Gold Coast, QLD, Australia
Duration: 29 Jun 20091 Jul 2009

Publication series

NameMaterials Science Forum
Volume618 619
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference4th International Conference Organised by the CAST CRC, on Behalf of the Global Light Metals Alliance
Country/TerritoryAustralia
CityGold Coast, QLD
Period29/06/091/07/09

Keywords

  • Alpha phase morphology
  • Lamellar microstructure
  • Quantitative analysis
  • Ti-17 alloy

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