Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Tribological behavior of jaspilite evaluated by micro-scratch test
Submission Author:
Renan Magnol , ES
Co-Authors:
Renan Magnol, Marciano Macedo, Marcelo de Macêdo, Cherlio Scandian
Presenter: Renan Magnol
doi://10.26678/ABCM.COBEM2017.COB17-2398
Abstract
The aim of this study is to characterize the tribological behavior of a banded iron formation known as jaspilite, which has two main minerals, hematite and jasper. Linear scratch tests were performed with two types of diamond indenters, Vickers and Rockwell, and different normal loads. Critical loads for mechanisms transitions (burnishing, ploughing, in-track and out-of-track cracking) were determined for each indenter and mineral. Critical transition loads are considerably lower for Vickers indenter, which resulted in a non-observation of moderate wear mechanisms (burnishing and ploughing). The ploughing mechanism was not observed in jasper. The quartz vein in the samples influenced the scratch response of both minerals, tending to embrittle them. Two types of iron oxide with different transitions loads were identified. Afterwards, Vickers scratch tests were done with five different normal loads (0.2, 0.5, 2, 5, e 10 N), as a result, the track width increased with applied normal load.
Keywords
Linear scratch test, jaspilite, wear mechanisms, Abrasive wear
