Influencia de la carga aplicada en el comportamiento al desgaste en fundiciones nodulares austemperadas nanoestructuradas aleadas con cobre y niquel

Ximena Ospina Arrubla; Mateo Montoya Mejía; Harold David Machado; Ricardo Emilio Aristizábal Sierra

doi:10.17533/udea.rcm.342070

Authors

Ximena Ospina Arrubla University of Antioquia
Mateo Montoya Mejía University of Antioquia
Harold David Machado University of Antioquia
Ricardo Emilio Aristizábal Sierra University of Antioquia

DOI:

https://doi.org/10.17533/udea.rcm.342070

Keywords:

ausferritic, wear, TRIP effect, austempered, ADI

Abstract

Austempered ductile iron (ADI) castings are characterized by having a microstructure of graphite nodules embedded in an ausferritic matrix (bainitic ferrite + high carbon austenite) [1]. The high wear resistance of ADI can be exploited when the loading conditions produce the transformation of high carbon austenite to martensite by the TRIP (Transformation induced plasticity) effect. In this work, boll-on-disk tests were performed in nanostructured ADI alloyed with copper and nickel with variations of the applied load, while the average roughness, number of cycles, body rotation speed, turning radius and temperature were kept constants. The wear mechanisms were analyzed by optical microscopy and scanning electron microscopy (SEM). The results allowed to establish a possible critical load necessary to activate the TRIP effect.

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Author Biographies

Ximena Ospina Arrubla, University of Antioquia

Pyrometallurgical and Materials Research Group (GIPIMME), Department of Metallurgical and Materials Engineering, Universidty of Antioquia.

Mateo Montoya Mejía, University of Antioquia

Pyrometallurgical and Materials Research Group (GIPIMME), Department of Metallurgical and Materials Engineering, University of Antioquia.

Harold David Machado, University of Antioquia

Pyrometallurgical and Materials Research Group (GIPIMME), Department of Metallurgical and Materials Engineering, University of Antioquia.

Ricardo Emilio Aristizábal Sierra, University of Antioquia

Pyrometallurgical and Materials Research Group (GIPIMME), Department of Metallurgical and Materials Engineering, University of Antioquia.

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