Effect of Heat Treatment on the Mechanical Properties of Roll-Bonded Al3003/STS439 Hybrid Plate

Ju Young Jin; In Kyu Kim; Sun Ig Hong

doi:10.4028/www.scientific.net/AMR.813.104

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The Effects of Chromium-Free Insulating Coating on the Magnetic Properties in Grain-Oriented Electrical Steel
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Effect of Heat Treatment on the Mechanical Properties of Roll-Bonded Al3003/STS439 Hybrid Plate
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 813Effect of Heat Treatment on the Mechanical...

Effect of Heat Treatment on the Mechanical Properties of Roll-Bonded Al3003/STS439 Hybrid Plate

Abstract:

In this study, roll-bonded Al/STS clad was heat-treated at various temperature (200-600 °C) for 1hour and then their mechanical performance and interfacial structure was studied. To estimate the mechanical properties of heat-treated clad materials at various temperatures, the tension tests were performed. For Al/STS clad heat-treated from 200 °C to 500 °C, no interfacial reaction layer was observed. Brittle intermetallic layer was observed between Al and STS, which induced the interface crack due to the large mismatch of the thermal expansion coefficient between two metal plates. XRD peaks from the interface region indicate the presence of Al₂Fe, Al₅Fe and Al₁₃Cr₂ in addition to Fe, Cr, Al and Mn. The UTS of Al/STS sheet was observed to follow the rule of mixture. One noticeable observation from stress-strain responses is that the fracture strain of Al/STS clad sheet increased markedly more than that of Al clad sheet by the increasing heat treatment temperature.