STUDY OF THE MECHANICAL AND METALLURGICAL PROPERTIES OF DISSIMILAR WELDS
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Abstract
In this research dissimilar welds were made of low carbon steel (A516) and austenitic stainless
steel (316L) by shielded metal arc welding (SMAW) and with different electrodes (E7018) , (E6013) ,
(E309L) and (E308L). The sheet thickness (6 mm), welding current (120 A), voltage (78V), polarity
(DCRP) and electrode diameter (3.25 mm) were remained constant. Many tests were carried out,
mechanical tests included tensile test, bending and microhardness also made , and metallurgical
inspections included microstructure, delta- ferrite phase and x- ray diffraction analysis. It was found
from tensile and bending tests results that the electrode (E309L) was the most convenient for
dissimilar welds of base metal (C.St. A516) and (St. St. 316L). Hardness tests showed that the highest
hardness value appears in (HAZ) and there are two peaks of maximum hardness, each peak value in
each (HAZ) for both dissimilar metals, the peak values are not equal and the higher value appears in
the zone, where the electrode differ from the base metal, i. e. when the electrode is used (E6013) the
higher value appeared in the (HAZ) which is near the stainless steel (316L), and when the electrode
(E309L) is used, the higher value appeared in (HAZ) near the low carbon steel (A516) .The tests
demonstrated that the delta (δ) ferrite phase was about 3-10% near stainless steel and for all used
electrodes.
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References
American Society for Metal, Metals Handbook , Vol.6, 9th Edition ,Copyright , 1983.
American Iron and Steel Institute , Welding of Stainless Steel and Other Joining Method , Handbook Series , No.9 , 2002 .
ASTM , Annual Book , Laboratory Corrosion Testing of Metals , 1988.
ASME, Boiler and Pressure Vessel Code, The American Society of Mechanical Engineers, 1989 .
Boyer H.E. and Gall T.L., "Metal Handbook" , Desk Edition , ASM, 1988.
Barnhouse E.J. and Lippold J.C., Microstructure / Property Relationships in Dissimilar Weld Between Duplex Stainless Steel and Carbon Steel , Welding Journal , Vo1.83 , No.1, 2004. PP.205 S -
S.
Barton N.R. and Lindberg R.A., Welding and Other Joining Processes , By Allyn and Bacon , Inc.
.
Brooks J.A. and Williams J.C., "Fundamentals Study of the Beneficial Effects of δ- Ferrite in
Reducing weld Cracking", Welding Journal, Vol. 63, No. 6 ,1984 , p.715.
Hebble T.L., Canonico D.A., Edmonds D.P. and Nan Stand R.K., "Analysis of Delta – Ferrite Data
Form Production Welds on Stainless Steel Pipe", Welding Journal, Vol. 64, No. 9, 1985, pp.260S- 265S.
Kujanpaa V. P.,"Weld Discontinuities in Austenitic Stainless Steel Sheet – Effect of Impurities and
Solidification Mode", Welding Journal, Vol. 63, No. 12, 1984, pp.369S- 375S.
Martti Vilpas, Predication of Microsegregation and Pitting Corrosion Resistance of Austenitic
Stainless Steel Welds by Modeling , VTT Publication , 1999.
Richard E. Avery, "Pay Attention to Dissimilar-Metal Weld" Avery Consulting Associates , Inc.2003,
pp.1-6 .
Sindo Kou , "Welding Metallurgy " , 2nd Edition , Wiley Interscience , John Wiley and Sons ,
Publication , 2003 .
Sourmail T. and Bhadeshia H.K.D.H, ,"Stainless Steel" , University Cambridge , 2005.
The Procedure Handbook of Arc Welding , 12th Edition, The Lincoln Electric Company of Canada ,
LTD , 1974.
Vitek J. M. and David S. A., "Improved Models for Predicating Ferrite Content in Stainless Steel Welds", USA, 2003 (internet) .