Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Interfacial Reaction on Heat Treatment of Roll-bonded STS304/Al1050/STS439 Clad Materials and its Effect on the Mechanical Properties

압연 제조된 STS439/Al1050/ STS304 Clad소재의 열처리에 따른 계면 반응과 기계적 특성에서의 계면 반응 효과

  • Song, Jun-Young (Department of Advanced Materials Engineering, Chungnam National University) ;
  • Kim, In-Kyu (Department of Advanced Materials Engineering, Chungnam National University) ;
  • Lee, Young-Seon (Korea Institute of Materials Science, Materials Deformation Group) ;
  • Hong, Sun Ig (Department of Advanced Materials Engineering, Chungnam National University)
  • 송준영 (충남대학교 나노소재공학과) ;
  • 김인규 (충남대학교 나노소재공학과) ;
  • 이영선 (재료연구소 변형제어그룹) ;
  • 홍순익 (충남대학교 나노소재공학과)
  • Received : 2011.04.08
  • Published : 2011.11.25
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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 $550^{\circ}C$. STS439/Al1050/STS304 clad metals fractured suddenly in a single step and the fracture decreased with increasing annealing temperatures at $450^{\circ}C$. After annealing at $550^{\circ}C$, samples fractured in three steps with each layer fracturing independently. Interfacial layers formed at $550^{\circ}C$ 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.

Keywords

Acknowledgement

Supported by : 지식경제부

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