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Abstract

Investigations of technological properties of new titanium alloy sheet VST2k have been conducted. It is found that the titanium alloy has a good solid state weldability and formability under conditions of superplasticity at temperatures 750-900C. By the method of SPF/DB sheet of VST2k alloy in a low-temperature superplasticity at a temperature of 800C has successfully made hollow blade model. The obtained results allow to recommend VST2k titanium alloy to be used in SPF/DB technology, particularly at low temperatures. {in Russian]
TE)ilIONOIWTI
OBPAEOTKR
TIOJTYOAEPI,IKATOB
WK 669.295: 621.785
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CBAPKI,I
NEW
SHEET
TITANIUM
ALLOY
VST2K
FOR
LOW-TEMPERATURE
TECHNOLOGY
OF SUPERPLASTIC
FORMING AND DIFFUSION
BONDING
P,B, CAOWYJIJIIIH (R. Safiullin), I,Iucmumym npo6neu
ceepxnnacmuuHocmu itemcrmor PAH, e-mail: drJrvs@mail.ru
P.M. |AJIEEB (R. Galeyev), I4ucmumym npo6neu
cnepxruacmuqHocmu
Metnanoe PAH, e-mail: galqtev@,imsp.ru
M.X. MTXAMETPAXI'IMOB (M. Mukhametrakhimov),
I4ucmumym
npo6neu
crepxnnacmuqHocmu Memannoe PAH,
e-mail: msia@,mail.ru
P,f XA3CAJIUEB (R. Hazgaliev), I'Iucmumym npo6neu
clepxmacmuuHocmu Memannoe PAH,
e-mail : s loth. us atu@,gmail. com
C.II. MAIIbIIIIEBA (5. Malysheva), I.Iucmumym npo6neu
caepxmacmuuHocmu Mem&uto6 PAH, e-mail: svufa@mail.ru
P.P. MYJIIOROB (R. Mulyukov), I4ucmumym
npo6neu clepxnnacmuwrocmu Memannoe
PAH, e-mail: radik@imsp.ru
A.H. RO3ilOB (A. Kozlov), IIAO <Ropnopat4ua
BCMIIO-ABUCMAT, e-mail: kozlov@vsmpo.ru
A.B. EEPECTOB (A. Berestov),IIAO <Ropnopaqun
BCMIIO-ABUCMA>, e-mail: berestov@,vsmpo.ru
M.O. JIEIEP (M. Leder), IIAO <Kopnopar4un
BCMIIO-ABUCMAr, e-mail: moleder@,vsmpo-avisma.ru
Ilpoeedeuut uccnedoeaHufl mexHoJtozuqecKux c6oiicm6 Horozo rucmo*ozo mumaHolozo cmaBa l/ST2k.
VcmauoeneHo, qmo dauuutil mumaHoBbtil crua6 u 4eem xopowyn csapusae 4ocmb 6 msepdo 4 cocmo-
flHuu u Qopuyeuocmb 6 ycttosuflx cnepxnnacmuuHocmu
npu meJrxnepamypax
750-900'C. Memodou
CilA/trC u3
trucma
cnn'ana VST2k s
ycnosuflx
HusKome
4nepamypuoil csepxmacmuqHocmu npu me.A4ne-
pamype
800'C ycneutHo
uszomozreHa
Atodenb notoft nonamKu. Ilonyueuuarc
pe3ylbmambt
no36ornlom
percoueudonamb
mumauoeutil
cma6 I/ST2b
dna ucnona3onaHufl
B
mexHuto?uu CIIQUC, 6 qecmHocmLt,
np u n
o
Hu )rc eHHbtx
m et4n ep amyp ax.
Knroqesrre cJroBa: MrrKpocrpyKTypa, cBepxflJracrrrqHocrl,
rtlranoeHii crrJIaB,
$opruyeuoctr,
4uSQyruoHH€uI
cBapKa.
Investigations of technological
properties of new titanium alloy sheet VST2k
have been conducted.
It
is found that the titanium alloy has a good solid state weldability and formability under conditions
of superplasticity at temperatures
750-900'C. By the method of SPF/DB sheet of t/ST2k alloy in a
low-temperature
superplasticity at a temperature
of 800"C has successfully made hollow blade model.
The obtained results allow to recommend VST2k
titanium alloy to be used in SPF/DB technology,
particularly at low temperatures.
Keywords: microstructure, superplasticity,
titanium alloy, formability, diffusion bonding.
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ResearchGate has not been able to resolve any citations for this publication.
Article
Full-text available
This paper reports on investigations of the solid state formability and weldability of Ti–6Al–4V titanium alloy sheet with submicrocrystalline structure (grain size 0·5 and 0·8 μm) under superplastic conditions at temperatures of 700 and 800°C. It has been established that the submicrocrystalline condition of the sheet material reduces the temperature of superplastic forming (SPF) by 200°C and of diffusion bonding (DB) by 100°C, compared to the conventional superplastic forming Ti–6Al–4V material with microcrystalline structure (grain size 3 μm). Unlike commercially available sheet, the submicron grained sheet is characterised by isotropic formability. Submicrocrystalline processed Ti–6Al–4V sheet can be successfully used in SPF/DB technology. The temperature range of superplastic forming can be between 700 and 800°C, and diffusion bonding at 800°C.
Article
Full-text available
The principles of fabricating nanostructured bulk and sheet materials by the methods of multiple isothermal forging and warm rolling are formulated. The first method, which is based on dynamic recrystallization, allows one to obtain bulk materials with a uniform nanostructure. The second method makes it possible to transform the latter into a sheet semi-product re taining this nanostructure. Using the example of titanium alloy, it is demonstrated that, when reducing the grain size down to the nanostructure level in a sheet material, technological operations on it—such as pressure welding and superplastic forming—can be performed at significantly lower temperatures than with the use of sheet materials with conventional fine-grained structures. This opens up new possibilities for fabricating hollow structures by a progressive method combining pressure welding and superplastic forming. Using the example of hollow blades, the development of nanotechnologies and nanomaterials for use in industry is demonstrated.
Conference Paper
Boeing has had seven years of high rate production of SPF titanium parts. The effect of 900degreesC forming temperature on die life, part surface finish and alpha case formation has been documented, which has shown that there would be a great advantage in forming at a lower temperature. This paper investigates in detail the SPF properties of three new alloy developments, SP700 from NKK/RMI (USA), fine grain Ti-6-4 from VSMPO (Russia) and sub-microcrystalline Ti-6-4 from IMSP (Russia). All these alloys are formable at around 760degreesC. The relationship between temperature and SPF stress, elongation, oxygen contamination and formability is examined and compared between the alloys. In addition, the probability of the alloy being implemented is discussed.
Study the technological properties of titanium alloy Ti-6Al-4V
  • R V Safiullin
  • M H Mukhametrakhimov
  • A Safiullin
  • S Malysheva
  • A N Kozlov
  • A V Berestov
  • S A Kharin
  • M A Morozov
R V. Safiullin, M.H. Mukhametrakhimov, A.R Safiullin, S.P Malysheva, A.N. Kozlov, A.V. Berestov, S.A.Kharin, M.A. Morozov, Study the technological properties of titanium alloy Ti-6Al-4V, Proc. of the Int. Conf. "Ti-2013 in the ClS", 354-362.
  • G A Salishchev
  • R Galeyev
  • R Valiakhmetov
  • R V Safiullin
  • R Ya
  • Lutfullin
G. A. Salishchev, R. M Galeyev,0 R. Valiakhmetov, R. V. Safiullin, R. Ya. Lutfullin,0. N Senkov, F. H. Froes and 0. A. Kaibyshev:J Mater. Process. Technol., 2001, 116, 265-268
Kharin The use o{ nanostructured materials and nanotechnologies for the elaboration ol hollow struclures
  • R Valiakhmetov
  • R M Galeyev
  • V Lvanko
  • R M Lmayev
  • A A Lnozemtsev
  • N L Koksharov
  • A A Kruglov
  • R Lutfullin
  • R R Mulyukov
  • A A Nazarov
  • R V Safiullin
R. Valiakhmetov, R.M, Galeyev, V.A lvanko, R M. lmayev, A.A. lnozemtsev, N.L. Koksharov, A.A. Kruglov, R. a. Lutfullin, R.R. Mulyukov, A.A. Nazarov, R.V. Safiullin, S A. Kharin The use o{ nanostructured materials and nanotechnologies for the elaboration ol hollow struclures, Nanotechnologies in Russia 02(2010), 5(1),108-122
  • G A Salishchev
  • S P Galeyev
  • R Malysheva
  • Valiakhmetov
G.A. Salishchev, R M Galeyev, S.P. Malysheva and 0 R.Valiakhmetov, Mater. Sci. Forum, 243-245 (1997),585-590.