Abstract
The effect of preheating on strain rate and liquid flowrate is analysed to develop a model for solidification cracking in successive laser weld spots in 2024 aluminium alloy. It is shown that the lower tendency for solidification cracking with preheating can be attributed to the lower strain rate but not the feeding rate. It is also shown there is a strong tendency for solidification crack propagation through the fusion lines between the consecutive weld spots where there is already a crack present at the fusion line. This observation can be attributed to the higher local strain rate and lower feeding rate.
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References
1.
Boellinghaus
T.
:‘Hot cracking phenomena in welds’ , 3 –18 ; 2005 , Berlin , Springer .
2.
Zhou
W.
,
Long
T. Z.
and
Mark
C. K.
:Sci. Technol. Weld. Join. , 2007 , 23 , (11) , 1294 –1299 .
3.
Shih
Y. J.
:Sci. Technol. Weld. Join. , 2013 , 18 , (7) , 566 –572 .
4.
Zhang
C.
,
Gao
M.
,
Li
G.
,
Chen
C.
and
Zeng
X. Y.
:Sci. Technol. Weld. Join. , 2013 , 18 , (8) , 703 –710 .
5.
Coniglio
N.
and
Patry
M.
:Sci. Technol. Weld. Join. , 2013 , 18 , (7) , 573 –580 .
6.
Rappaz
M.
,
Drezeta
J.-M.
and
Gremaud
M.
:Mater. Trans. A 1999 , 30A , 449 –455 .
7.
Niel
A.
,
Bordreuil
C.
,
Deschaux-Beaume
F.
and
Fras
G.
:Sci. Technol. Weld. Join. , 2013 , 18 , (2) , 154 –160 .
8.
Kim
C.
,
Kang
M.
and
Kang
N.
:Sci. Technol. Weld. Join. , 2013 , 18 , (1) , 57 –61 .
9.
Gebhardt
M. O.
,
Gumenyuk
A.
and
Rethmeier
M.
:Sci. Technol. Weld. Join ., to be published .
10.
Michaud
E. J.
,
Kerr
H. W.
and
Weckman
D. C.
:Proc. 2nd Int. Conf. on ‘Trends in welding research’, Gatlinburg, TN, USA, June 1995, ASM International, Paper 21 .
11.
Sheikhi
M.
,
Malek Ghaini
F.
,
Torkamany
M. J.
and
Sabbaghzadeh
J.
:Sci. Technol. Weld. Join. , 2009 , 14 , (2) , 161 –165 .
12.
Stangeland
A.
,
Mo
A.
,
M'Hamdi
M.
,
Viano
D.
,
Davidson
C.
Met Mater Trans A , 2006 , 37 , 705 .
13.
Malekshahi Beiranvand
Z.
,
Malek Ghaini
F.
,
Sheikhi
M.
and
Abdollah-Zadeh
A.
:Sci. Technol. Weld. Join. , 2013 , 18 , (6) , 473 –477 .
14.
Malek Ghaini
F.
,
Sheikhi
M.
,
Torkamany
M. J.
and
Sabbaghzadeh
J.
:Mater. Sci. Eng. A , 2009 , A519 , 167 –171 .
15.
Kou
S.
:‘Welding metallurgy’ ; 2002 , New Jersey , John Wiley & Sons .
16.
Huang
C.
,
Cao
G.
and
Kou
S.
:Sci. Technol. weld. Join. , 2004 , 9 , (2) , 149 –157 .
17.
Pickin
C. G.
,
Williams
S. W.
,
Prangnell
P.
,
Derry
C.
and
Lunt
M.
:Sci. Technol. Weld. Join. , 2010 , 12 , (3) , 491 –496 .
18.
Kool
S. W. H.
and
Katgerman
L.
:Met. Mater. Trans. A , 2005 , 36A , 1537 .
19.
M'Hamdi
M.
,
Pilipenko
A.
and
Eskin
D.
:AFS Trans. , 2003 , 111 , 333 –340 .
20.
Piwonka
T. S.
and
Flemings
M. C.
:Trans. AIME , 1966 , 236 , 1157 .
21.Suyitno, Kool W.H, Katgerman L: Met Mater Trans A 2005, 36, 1537.
22.
M'Hamdi
M.
,
Fjær
H. G.
,
Mo
A.
,
Mortensen
D.
and
Benum
S.
:in ‘Solidification of aluminium alloys’ , (ed.
Han
Q.
et al..), 191 –199 ; 2004 , Warrendale, PA , TMS .
23.
Coniglio
N.
and
Cross
C. E.
:Met. Mater. Trans. A , 2009 , 40A , 2718 –2727 .
24.
Campbell
J.
:‘Castings’ ; 1991 , Oxford , Butterworth-Heinemann .