The Paton Welding Journal, 2012, №07



2012 №07 (03)

2012 №07 (05)

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The Paton Welding Journal, 2012, #7, 15-18 pages  

PECULIARITIES OF STRUCTURE AND MECHANICAL HETEROGENEITY IN EB-WELDED JOINTS OF 1201-T ALLOY

V.R. SKALSKY¹, L.R. BOTVINA² and I.N. LYASOTA¹

¹H.V. Karpenko Physico-Mechanical Institute, NASU, Lvov, Ukraine
²A.A. Baikov Institute of Metallurgy and Materials Science, RAS, Moscow, Russia
 
 
Abstract
The peculiarities of microstructure and distribution of microhardness of weld and heat-affected zone metal of welded joints of 1201-T alloy, produced using electron beam welding at different values of heat input, were studied. Using plotted temperature fields the running of phase transformations occurred in welding was analyzed. It was established that due to change of cooling rate across the thickness of plates the microstructure of near-weld zone in upper and lower parts of welded joint were considerably different. The increase of heat input of welding facilitates recrystallization processes which leads to increase of heat-affected zone.
 
 
Keywords: electron beam welding, aluminium alloy, heat-affected zone, weakening, temperature field, structure and mechanical heterogeneity, microstructure
 
 
Received:                28.11.11
Published:               28.07.12
 
 
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