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Abstract
Forming mechanics of a twin-roll cast AA1100/409L clad sheet after annealing and
cold rolling was investigated by tensile and three-point bending tests. The effect of
mechanical properties of the base metals and bonding strength on the strength and
ductility of the clad sheet was investigated based on the mixed rule. The clad sheet’s
strength obeys the mixed rule only when the bonding strength is as high as
15 N/mm. The negative correlation between strength and ductility and the
synergistic effect also exist in the TRC SS/Al clad sheet only when the bonding
strength is as high as 15 N/mm. Because of the too small thickness and much higher
strength of the steel layer than that of the Al layer, tensile stress dominates during
bending of the TRC clad sheet. The deformation and failure process of the clad
sheet was analyzed and the processing route for a better formability was
proposed.
Keywords
twin-roll casting, clad sheet, cold rolling, annealing,
formability
Milestones
Received: 28 July 2023
Revised: 14 November 2023
Accepted: 6 December 2023
Published: 31 January 2024
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