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Abstract

The present study has investigated the influence of current pulsing on the structure and mechanical properties of Ti–6Al–4V tungsten inert gas (TIG) weldments. Autogenous full penetration bead on plate TIG welds were made with and without direct current pulsing. Microstructural observations and evaluation of hardness, tensile and fatigue properties of the weldments were made in different conditions: as welded and post-weld heat treatment (PWHT) conditions (PWHT was done at 700 and 900°C). Current pulsing resulted in slight refinement of prior β grains, leading to better tensile strength, ductility and fatigue lives of weldments in the as welded condition. In the case of weldments subjected to PWHTs, the pulsed weldments exhibited inferior fatigue lives compared with the unpulsed weldments. The PWHT done at 900°C resulted in inferior fatigue lives of weldments compared with that done at 700°C.

Keywords

TI-6AL-4V TIG WELDMENT ALPHA PLATELET WIDTH PRIOR BETA GRAIN SIZE PWHT

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References

Boyer

R. R.

: Mater. Sci. Eng. A, 1996, A213, 103–114.

Lutjering

and Williams

J. C.

: ‘Titanium’, 177–232; 2003, Berlin, Springer-Verlag.

Peters

J. O.

and Luterjing

: Metall. Mater. Trans. A, 2001, 32A, 2805–2818.

Baeslack

W. A.

III and Banas

C. M.

: Weld. J., 1981, 60, 121s–130s.

Subramanian

, White

D. R.

, Jones

J. E.

and Lyons

D. W.

: Weld. J., May 1999, 166s–172s.

Becker

D. W.

and Adams

C. M.

Jr. : Weld. J., 1979, 58, 143s–152s.

Mohandas

and Reddy

G. M.

: J. Mater. Sci. Lett., 1996, 15, 626–629.

Ravi Vishnu

: Weld. World, 1995, 35, 214–218.

Sundaresan

, Janaki Ram

G. D.

and Reddy

G. M.

: Mater. Sci. Eng. A, 1999, A262, 88–100.

10.

Babu

N. K.

, Raman

S. G. S.

, Murthy

C. V. S.

and Reddy

G. M.

: Sci. Technol. Weld. Join., 2005, 10, 583–590.

11.

Gokhale

A.A.

, Tzavaras

A. A.

, Brody

H. D.

and Ecer

G. M.

: Proc. Conf. on ‘Grain refinement in castings and welds’, (ed. G. J. Abbaschian and S. A. David), 259–263; 1983, Warrendale, PA, TMS–AMIE.

12.

Hallum

D. L.

and Baeslack

W. A.

III : Weld. J., 1990, 69, 326s–330s.

13.

Keshava Murthy

and Sundaresan

: Int. J. Join. Mater., 1995, 7, 129–135.

14.

Brooks

C. R.

: in ‘Heat treatment, structure and properties of non-ferrous alloys’, 360–373; 1982, Metals Park, OH, ASM.

15.

Baeslack

W. A.

III : Weld. J., 1982, 61, 197s–199s.

16.

Hirth

J. P.

and Froes

F. H.

: Metall. Trans. A, 1977, 8A, 165–169.

17.

Ward-Close

C. M.

: Proc. Conf. on ‘The metallurgy of light alloys’, Loughborough, UK, March 1983, The Institution of Metallurgists, 260–264.

18.

Baker

T. S.

: ‘Designing with titanium’, 267–276; 1986, London, The Institute of Metals.

19.

Stephens

R. I.

, Fatemi

, Stephens

R. R.

and Fuchs

H. O.

: ‘Metal fatigue in engineering’, 2nd edn, 78–79; 2000, New York John Wiley & Sons, Inc.

20.

Lutjering

: Mater. Sci. Eng. A, 1999, A263, 117–126.

21.

Lin

F. S.

, Starke

E. A.

Jr. , Chakraborty

S. B.

and Gysler

: Metall. Mater. Trans. A, 1984, 15A, 1229–1246.

22.

Lutjering

: Mater. Sci. Eng. A, 1998, A243, 32–35.

23.

Margolin

and Hoo

H. L.

: in ‘Microstructure, fracture toughness and fatigue crack growth rate in titanium alloys’, (ed. A. K. Chakrabarti and J. C. Chesnutt), 131–136; 1987, Warrendale, PA, TMS–AIME.

Influence of current pulsing on microstructure and mechanical properties of Ti–6Al–4V TIG weldments

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