Effect of joint line remnant on fatigue lifetime of friction stir welded Al–Cu

Abstract

The effect of joint line remnant (JLR) on the fatigue lifetime of friction stir welds of a 2198 Al alloy in T851 condition has been assessed experimentally. The base material, sound welds (welded in one sheet) and welds with JLR (produced via welding of two sheets with a natural oxide layer) have been investigated. A strong decrease in microhardness is found for the weak weld zone that is consistent with the reduction in tensile properties compared to the base material: 45% in yield strength and 22% in ultimate tensile strength. The fatigue strengths of sound and JLR bearing welds at 100 000 cycles (R=0·1) are reduced by 10 and 15% respectively compared to the base material. Only for one-third of the JLR bearing specimens, the fatigue crack initiated in regions close to the JLR and this without reduction in fatigue lifetime.

Keywords

FRICTION STIR WELDING FATIGUE JOINT LINE REMNANT AL–CU–LI

Get full access to this article

View all access options for this article.

References

Mishra

R. S.

and Ma

Z. Y.

: Mater. Sci. Eng. R, 2005, R50, 1–78.

Threadgill

P. L.

, Leonard

A. J.

, Shercliff

H. R.

and Withers

P. J.

: Int. Mater. Rev., 2009, 54, (2), 49–93.

Jin

, Saimoto

, Ball

and Threadgill

P. L.

: Mater. Sci. Technol., 2001, 17, 1605–1614.

Sutton

M. A.

, Yang

, Reynolds

A. P.

and Taylor

: Mater. Sci. Eng. A, 2002, 323A, 160–66.

Schneider

J. A.

and Nunes

A. C.

: Metall. Mater. Trans. B, 2004, 35B, 777–783.

Pragnell

P. B.

and Heason

C. P.

: Acta Mater., 2005, 53, 3179–3192.

Colligan

: Weld. J., 1999, 78, 229s–237s.

Reynolds

, Seidel

R. U.

and Simonsen

: Proc. 1st Int. Symp. on ‘Friction stir welding’, Thousand Oaks, CA, USA, June 1999, TWI. Session 4, on CD.

Guerra

, Schmidt

, McClure

J. C.

, Murr

L. E.

and Nunes

A. C.

: Mater. Charact., 2003, 49, 95–101.

10.

Muthukumaran

and Mukherjee

S. K.

: Int. J. Adv. Manuf. Technol., 2008, 38, 68–73.

11.

Dickerson

, Shercliff

H. R.

and Schmidt

: Proc. 4th Int. Symp. on ‘Friction Stir welding’, Park City, UT, USA, May 2003, Poster session, TWI.

12.

London

, Mahoney

, Bingel

, Calabrese

, Bossi

R. H.

and Waldron

: Proc. 4th Int. Symp. on ‘Friction stir welding’, Montreal, Que., Canada, October 2006, TWI, 1400–1430.

13.

Seidel

T. U.

and Reynolds

A. P.

: Metall. Mater. Trans. A, 2001, 32A, (11), 2879–2884.

14.

Reynolds

A. P.

: Sci. Technol. Weld. Join., 2000, 5, (2), 120–124.

15.

Fratini

, Buffa

, Palmeri

, Hua

and Shivpuri

: Sci. Technol. Weld. Join., 2006, 11, (4), 412–421.

16.

, Murr

L. E.

and McClure

J. C.

: Scr. Mater., 1999, 40, 1041–1046.

17.

Ouyang

J. H.

, Jandric

, Kovacevic

, Song

and Valant

: Proc. 6th Int. Conf. on ‘Trends in welding research’, Pine Mountain, GA, USA, April 2002, ASM International, 229–234.

18.

Gerlich

, Su

, Yamamoto

and North

T. H.

: Sci. Technol Weld. Join., 2008, 13, (3), 254–264.

19.

Schmidt

H. N. N.

, Dickerson

T. L.

and Hattel

J. H.

: Acta Mater., 2006, 54, 1199–1209.

20.

Chen

Z. W.

and Cui

: Scr. Mater., 2008, 58, 417–420.

21.

McClure

J. C.

, Coronado

, Aloor

, Nowak

B. M.

, Murr

L. E.

and Nunes

A. C.

: Proc. 6th Int. Conf. on ‘Trends in welding research’, Pine Mountain, GA, USA, April 2002, ASM International, 257–261.

22.

Fonda

R. W.

, Bingert

J. F.

and Colligan

K. J.

: Scr. Mater., 2004, 51, 243–248.

23.

Sato

, Kurihara

and Kokawa

: Proc. 6h Int. Symp. on ‘Friction stir welding’, Montreal, Que., Canada, October 2006, TWI. Paper 71.

24.

da Silva

A. A. M.

, Aldanondo

, Alvarez

, Lizarralde

and Echeverria

: Mater. Sci. Forum, 2010, 638–642, 1221–1226.

25.

Yan

, Sutton

M. A.

and Reynolds

A. P.

: Proc. 5th Int. Symp. on ‘Friction stir welding’, Metz, France, September 2004, TWI. Paper 07B.

26.

Gerlich

, Yamamoto

and North

T. H.

: Sci. Technol. Weld. Join, 2007, 12, (6), 472–480.

27.

Balasubramanian

, Gattu

and Mishra

R. S.

: Sci. Technol. Weld. Join., 2009, 14, (2), 141–145.

28.

, Gerlich

, North

T. H.

and Bendzsak

G. J.

: Metall. Trans. A, 2007, 38A, 584–595.

29.

Leal

R. M.

, Leitao

, Loureiro

, Rodrigues

D. M.

and Vilaca

: Mater Sci. Eng. A, 2008, A498, 384–391.

Effect of joint line remnant on fatigue lifetime of friction stir welded Al–Cu–Li alloy

Abstract

Keywords

Get full access to this article

References