Continuous production of metal matrix composites from the semisolid state

• Autor(a) principal: Lima Filho, Antonio de Pádua [UNESP]
• Data de Publicação: 2013
• Outros Autores: Ikeda, Rafael Shoiti [UNESP]
• Tipo de documento: Artigo de conferência
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.4028/www.scientific.net/SSP.192-193.83; http://hdl.handle.net/11449/74294
• topic: Metal matrix composites; Metallic fibres; SnPb alloys; Strip casting; Contact time; Continuous production; Fabrication method; Formation mechanism; Globular structure; Melt drag; Semi-solid state; Sn-Pb alloys; Strip Casting; Alloys; Slags; Strip metal; Wire; Metallic matrix composites

Continuous strip metal matrix composite (MMC) casting of 0.3 mm diameter hard-drawn stainless steel (316L) wire in a quasi-eutectic SnPb (64Sn36Pb) matrix was performed by a two-roll melt drag processing (TRMDping) method, with the wire being dragged through a semisolid puddle with a fibre contact time of approximately 0.2 s. A slag weir placed at the nozzle contained two wire guide holes: one located near the upper roll, and the other located between the rolls. A successful continuous composite strip casting with good fibre alignment was achieved by inserting and embedding the wire into the matrix using the guide hole between the rolls. Degeneration of eutectic/dendrite structures led to the formation of globular structures. The occurrence and formation mechanisms of cracks, de-lamination and voids in the matrix were discussed. TRMDping is economically viable and has significant benefits over other MMC fabrication methods. © (2013) Trans Tech Publications, Switzerland.