Paper Title:
Superplastic Properties of γ+α2 Titanium Aluminide Alloy Ti-43Al-(Nb,Mo,B) in Cast + Post-Solidification Heat Treated Condition
  Abstract

A novel approach to fabrication of globularized fine-grained structure in γ+α2 titanium aluminide alloys has been proposed. The approach included the use of a specially designed alloy Ti-43Al-X(Nb,Mo,B) and heat treatment. It was found that the ingot structure of the alloy might be partially globularized on a scale of bulk material using only globularization anneal excluding any hot working procedure. The microstructure and tensile mechanical properties of the alloy in the cast + heat treated condition were investigated. The tensile mechanical tests were performed in air in the temperature range of T=900-1130°C at an initial strain rate of ε′=1.7×10-4 s-1. High elongation (δ=160-230%) and low flow stresses (σ=36-100 MPa) typical of superplastic behavior were measured at T=1050-1130°C. It was demonstrated that the sheet material produced by spark cutting of the cast + heat treated alloy might be successfully hot formed.

  Info
Periodical
Materials Science Forum (Volumes 551-552)
Edited by
K.F. Zhang
Pages
447-452
DOI
10.4028/www.scientific.net/MSF.551-552.447
Citation
V.M. Imayev, R. M. Imayev, T. G. Khismatullin, G. A. Salishchev, "Superplastic Properties of γ+α2 Titanium Aluminide Alloy Ti-43Al-(Nb,Mo,B) in Cast + Post-Solidification Heat Treated Condition", Materials Science Forum, Vols. 551-552, pp. 447-452, 2007
Online since
July 2007
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Price
$32.00
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