The effects of postrolling heat treatment on the mechanical property and microstructure of 1050 aluminum alloy and 304 stainless steel (SS) clad metals were investigated. Clad metals were made by cold rolling after surface treatments of both sheets followed by heat treatment at 500 °C for various annealing times. The effects of transformation of microstructure at the interface on bonding strength are discussed. The initial clad roll bonding of Al/stainless steel clad metal was bonded by mechanical locking at the interface. The protruding stainless steel in the interface is the diffusion route and forms the better joint with aluminum in the annealing process, which results in the enhancement of the bonding strength. Intermediate layers were formed for over 2 h. It resulted in the weakening of the bonding strength and the fracture surface transforms into a brittle structure. As Al/stainless steel clad metals were under 13% reduction ratio, it had the optimum bond strength with a heat treatment for 1 h at 500 °C.

References

References
1.
Altekar
,
V. A.
,
Banerjee
,
S. K.
,
Ghose
,
B. N.
, and
Bhattacharya
,
J.
, 1981, “
Development of Clad Metals for Various Applications
,”
NML Tech. J.
,
23
, pp.
32
36
.
2.
Bay
,
N.
, 1986, “
Cold Welding 2: Process Variants and Applications
,”
Met. Constr.
,
18
, pp.
486
490
.
3.
Koga
,
S.
, 2003, “
Application of New Welding and Joining Processes to Rolling Stock and Aerospace Industries
,”
Q. J. Jpn. Weld. Soc.
,
72
, pp.
49
52
.
4.
Yahiro
,
A.
,
Masui
,
T.
,
Yoshida
,
T.
, and
Doi
,
D.
, 1991, “
Development of Nonferrous Clad Plate and Sheet by Warm Rolling With Different Temperature of Materials
,
ISIJ Int.
,
31
, pp.
467
654
.
5.
Kawase
,
H.
,
Makimoto
,
M.
,
Takagi
,
K.
,
Ishida
,
Y.
, and
Tanaka
,
T.
, 1983, “
Development of Aluminum Clad Steel by Roll Bonding
,”
Trans. Iron Steel Inst. Jpn.
,
23
, pp.
628
632
.
6.
Ryabov
,
V. R.
, 1985,
Aluminizing of Steel
,
Oxoniane
,
New Delhi
, p.
17
.
7.
Abbasi
,
M.
, Karimi
Taheri
,
A.
, and
Salehi
,
M. T.
, 2001, “
Growth Rate of Intermetallic Compounds in Al/Cu Bimetal Produced by Cold Roll Welding Process
,”
J. Alloys Compd.
,
319
, pp.
233
241
.
8.
Kazanowski
,
P.
,
Epler
,
M. E.
, and
Misiolek
,
W. Z.
, 2004, “
Bi-Metal Rod Extrusion—Process and Product Optimization
,”
Mater. Sci. Eng., A
,
369
, pp.
170
180
.
9.
Khosravifard
,
A.
, and
Ebrahimi
,
R.
, 2010, “
Investigation of Parameters Affecting Interface Strength in Al/Cu Clad Bimetal Rod Extrusion Process
,”
Mater. Des.
,
31
(
1
), pp.
493
499
.
10.
Takeshi
,
I.
,
Kazuyuki
,
H.
,
Masahiro
,
F.
, and
Toru
,
N.
, 1994, “
Improvement of the Bonding Strength of Al/Cu Transition Joint Made by Single-Shot Explosive Welding Technique Using Cu Intermediate Plate
,”
Q. J. Jpn. Weld. Soc.
,
12
, pp.
77
81
.
11.
Ha
,
Y. C.
,
Ha
,
J. H.
,
Lee
,
H. G.
,
Kim
,
D. K.
, and
Lee
,
B. I.
, 2005, “
Electrochemical and Optical Characterization of the Corrosion Resistivity of Explosively Bonded Al-Cu Bimetal
,”
Mater. Sci. Forum
,
475–479
, pp.
2675
2678
.
12.
Watanabe
,
T.
,
Takayama
,
H.
, and
Yanagisawa
,
A.
, 2006, “
Joining of Aluminum Alloy to Steel by Friction Stir Welding
,”
J. Mater. Process. Technol.
,
178
(
1–3
), pp.
342
349
.
13.
Yilmaz
,
O.
, and
Celik
,
H.
, 2003, “
Electrical and Thermal Properties of the Interface at Diffusion-Bonded and Soldered 304 Stainless Steel and Copper Bimetal
,”
J. Mater. Process. Technol.
,
141
, pp.
67
76
.
14.
Cave
,
J. A.
, and
Williams
,
J. D.
, 1973, “
The Mechanism of Cold Pressure Welding by Rolling
,”
J. Inst. Met.
,
101
, pp.
203
207
.
15.
Bay
,
N.
, 1983, “
Mechanism Producing Metallic Bonds in Cold Welding
,”
Weld. J. (London)
,
62
, pp.
137
142
.
You do not currently have access to this content.