Grain refinement in small-size ingots of intermetallic alloys Ti-46Al-8Nb and Ti-46Al-8Ta with the use of a massive transformation

V. M. Imayev, T. I. Oleneva, T. G. Khismatullin, R. M. Imayev, R. Valiev, H. J. Fecht

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

An estimation of the efficiency of the refinement of colonies/grains of the as-cast structure of ingots of size φ13 × 150 mm in the Ti-46Al-8Nb and Ti-46Al-8Ta (at %) alloys with the aid of a heat treatment including massive transformation has been performed. It is shown that the initial coarse-grained as-cast structure of these alloys can be refined using massive transformation without the use of a labor-consuming procedure of hot working. The method proposed is efficient for the alloys containing alloying elements that retard diffusion in the alloys, which makes it possible to obtain massive γm phase at moderate cooling rates. It is shown by X-ray diffraction that the massive ?m phase is characterized by a reduced parameter of tetragonality, which can be restored via subsequent high-temperature aging. 

LanguageEnglish
Pages369-375
Number of pages7
JournalPhysics of Metals and Metallography
Volume109
Issue number4
DOIs
Publication statusPublished - Apr 2010
Externally publishedYes

Fingerprint

Grain refinement
ingots
Ingots
Intermetallics
intermetallics
casts
hot working
labor
Hot working
Alloying elements
alloying
heat treatment
Aging of materials
Heat treatment
Personnel
Cooling
cooling
X ray diffraction
diffraction
x rays

Keywords

  • Gamma titanium aluminides
  • grain refinement
  • massive transformation

Cite this

@article{8bb7bec3c23c4b109e46b3617d5fa9c2,
title = "Grain refinement in small-size ingots of intermetallic alloys Ti-46Al-8Nb and Ti-46Al-8Ta with the use of a massive transformation",
abstract = "An estimation of the efficiency of the refinement of colonies/grains of the as-cast structure of ingots of size φ13 × 150 mm in the Ti-46Al-8Nb and Ti-46Al-8Ta (at {\%}) alloys with the aid of a heat treatment including massive transformation has been performed. It is shown that the initial coarse-grained as-cast structure of these alloys can be refined using massive transformation without the use of a labor-consuming procedure of hot working. The method proposed is efficient for the alloys containing alloying elements that retard diffusion in the alloys, which makes it possible to obtain massive γm phase at moderate cooling rates. It is shown by X-ray diffraction that the massive ?m phase is characterized by a reduced parameter of tetragonality, which can be restored via subsequent high-temperature aging. ",
keywords = "Gamma titanium aluminides, grain refinement, massive transformation",
author = "Imayev, {V. M.} and Oleneva, {T. I.} and Khismatullin, {T. G.} and Imayev, {R. M.} and R. Valiev and Fecht, {H. J.}",
year = "2010",
month = "4",
doi = "10.1134/S0031918X10040101",
language = "English",
volume = "109",
pages = "369--375",
journal = "Physics of Metals and Metallography",
issn = "0031-918X",
number = "4",

}

Grain refinement in small-size ingots of intermetallic alloys Ti-46Al-8Nb and Ti-46Al-8Ta with the use of a massive transformation. / Imayev, V. M.; Oleneva, T. I.; Khismatullin, T. G.; Imayev, R. M.; Valiev, R.; Fecht, H. J.

In: Physics of Metals and Metallography, Vol. 109, No. 4, 04.2010, p. 369-375.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Grain refinement in small-size ingots of intermetallic alloys Ti-46Al-8Nb and Ti-46Al-8Ta with the use of a massive transformation

AU - Imayev, V. M.

AU - Oleneva, T. I.

AU - Khismatullin, T. G.

AU - Imayev, R. M.

AU - Valiev, R.

AU - Fecht, H. J.

PY - 2010/4

Y1 - 2010/4

N2 - An estimation of the efficiency of the refinement of colonies/grains of the as-cast structure of ingots of size φ13 × 150 mm in the Ti-46Al-8Nb and Ti-46Al-8Ta (at %) alloys with the aid of a heat treatment including massive transformation has been performed. It is shown that the initial coarse-grained as-cast structure of these alloys can be refined using massive transformation without the use of a labor-consuming procedure of hot working. The method proposed is efficient for the alloys containing alloying elements that retard diffusion in the alloys, which makes it possible to obtain massive γm phase at moderate cooling rates. It is shown by X-ray diffraction that the massive ?m phase is characterized by a reduced parameter of tetragonality, which can be restored via subsequent high-temperature aging. 

AB - An estimation of the efficiency of the refinement of colonies/grains of the as-cast structure of ingots of size φ13 × 150 mm in the Ti-46Al-8Nb and Ti-46Al-8Ta (at %) alloys with the aid of a heat treatment including massive transformation has been performed. It is shown that the initial coarse-grained as-cast structure of these alloys can be refined using massive transformation without the use of a labor-consuming procedure of hot working. The method proposed is efficient for the alloys containing alloying elements that retard diffusion in the alloys, which makes it possible to obtain massive γm phase at moderate cooling rates. It is shown by X-ray diffraction that the massive ?m phase is characterized by a reduced parameter of tetragonality, which can be restored via subsequent high-temperature aging. 

KW - Gamma titanium aluminides

KW - grain refinement

KW - massive transformation

UR - http://www.scopus.com/inward/record.url?scp=77953553214&partnerID=8YFLogxK

U2 - 10.1134/S0031918X10040101

DO - 10.1134/S0031918X10040101

M3 - Article

VL - 109

SP - 369

EP - 375

JO - Physics of Metals and Metallography

T2 - Physics of Metals and Metallography

JF - Physics of Metals and Metallography

SN - 0031-918X

IS - 4

ER -