Artigo Acesso aberto

Temperature and Strain Rate Dependent Tension Properties of Stainless Steel-Aluminum-Magnesium Multilayered Sheet Fabricated by Roll Bonding

2011; The Korean Society for Technology of Plasticity and Materials Processing; Volume: 20; Issue: 3 Linguagem: Inglês

10.5228/kstp.2011.20.3.257

ISSN

2287-6359

Autores

Byungil Hwang, K.S. Lee, S.E. Hong, Y.S. Lee,

Tópico(s)

Advanced Welding Techniques Analysis

Resumo

Multilayer(clad) sheets, composed of two or more materials with different properties, are fabricated using the roll-bonding process. A good formability is an essential property for a multilayered sheet in order to manufacture parts by plastic deformation. In this study, the influences of temperature and strain rate on the plastic properties of stainless steel-aluminum-magnesium multilayered(STS-Al-Mg) sheets were investigated. Tensile tests were performed at various temperatures and strain rates on the multilayered sheet and on each separate layer. Fracture of the multilayered sheet was observed to be temperature-dependent. At the base temperature of $200^{\circ}C$ , all materials fractured simultaneously. At lower temperatures, the Mg alloy sheet fractured earlier than the other materials. Conversely, the other materials fractured earlier than the Mg alloy sheet at higher temperatures. The uniform and total elongations of the multilayered sheet were observed to be higher than that of each material at a temperature of $250^{\circ}C$ . Larger uniform elongations were obtained for higher strain rates at constant temperature. The same trend was observed for the Mg alloy sheet, which exhibited the lowest elongation among the three materials. The tensile strengths and elongations of the single layer sheets were compared to those of the multilayer material. The strength of the multilayered sheet was successfully calculated by the rule of mixture from the values of each single layer. However, no simple correlation between the elongation of each layer and that of the multilayer was obtained.

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