Superplastic properties of γ+α2 titanium aluminide alloy Ti-43Al-(Nb,Mo,B) in cast + post-solidification heat treated condition

V.M. Imayev, R.M. Imayev, T.G. Khismatullin, G.A. Salishchev

Research output: Contribution to journalConference Contribution

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-43 Al-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.

Fingerprint

titanium alloys
Titanium alloys
solidification
Solidification
casts
heat
Spark cutting
hot working
Hot working
ingots
Ingots
sparks
Plastic flow
elongation
strain rate
Strain rate
Elongation
heat treatment
fine structure
Heat treatment

Keywords

  • heat treatment
  • microstructure
  • superplasticity
  • tensile mechanical properties
  • titanium alumlnides

Cite this

@article{c2b86a8959fb4ab39d464f1446fb9615,
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-43 Al-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.",
keywords = "heat treatment, microstructure, superplasticity, tensile mechanical properties, titanium alumlnides",
author = "V.M. Imayev and R.M. Imayev and T.G. Khismatullin and G.A. Salishchev",
year = "2007",
doi = "10.4028/www.scientific.net/MSF.551-552.447",
language = "English",
volume = "551-552",
pages = "447--452",
journal = "Materials Science Forum",
issn = "0255-5476",

}

Superplastic properties of γ+α2 titanium aluminide alloy Ti-43Al-(Nb,Mo,B) in cast + post-solidification heat treated condition. / Imayev, V.M.; Imayev, R.M.; Khismatullin, T.G.; Salishchev, G.A.

In: Materials Science Forum, Vol. 551-552, 2007, p. 447-452.

Research output: Contribution to journalConference Contribution

TY - JOUR

T1 - Superplastic properties of γ+α2 titanium aluminide alloy Ti-43Al-(Nb,Mo,B) in cast + post-solidification heat treated condition

AU - Imayev, V.M.

AU - Imayev, R.M.

AU - Khismatullin, T.G.

AU - Salishchev, G.A.

PY - 2007

Y1 - 2007

N2 - 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-43 Al-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.

AB - 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-43 Al-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.

KW - heat treatment

KW - microstructure

KW - superplasticity

KW - tensile mechanical properties

KW - titanium alumlnides

UR - http://www.scopus.com/inward/record.url?scp=38449095538&partnerID=8YFLogxK

U2 - 10.4028/www.scientific.net/MSF.551-552.447

DO - 10.4028/www.scientific.net/MSF.551-552.447

M3 - Conference Contribution

VL - 551-552

SP - 447

EP - 452

JO - Materials Science Forum

T2 - Materials Science Forum

JF - Materials Science Forum

SN - 0255-5476

ER -