| Title |
Interfacial Reaction on Heat Treatment of Roll-bonded STS304/Al1050/STS439 Clad Materials and its Effect on the Mechanical Properties |
| Authors |
송준영(Jun Young Song); 김인규(In Kyu Kim); 이영선(Young Seon Lee); 홍순익(Sun Ig Hong) |
| DOI |
https://doi.org/10.3365/KJMM.2011.49.11.910 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
stainless steel; aluminum; clad sheet; interface properties; compound Layer; annealing; mechanical properties |
| Abstract |
The microstructures and mechanical properties of roll-bonded STS439/Al1050/STS304 clad materials were investigated after an annealing process at various temperatures. Interfacial layer was developed at the STS439/Al1050 and Al1050/ STS304 interfaces at 550℃. STS439/Al1050/STS304 clad metals fractured suddenly in a single step and the fracture decreased with increasing annealing temperatures at 450℃. After annealing at 550℃, samples fractured in three steps with each layer fracturing independently. Interfacial layers formed at 550℃ with a high Vickers microhardness were found to be brittle. During tensile testing, periodic parallel cracks were observed at the interfacial reaction layer. Observed micro-void between Al1050 and the interfacial layer was found to weaken the Al1050/reaction layer interface, leading to the total separation between Al1050 and the reaction layer. |