Título

CORRELATION AMONG ABRASIVE WEAR TESTS1

CORRELATION AMONG ABRASIVE WEAR TESTS1

Autoria

Dutra, Leandro Almeida; Mello, José Daniel Biasoli de; Macêdo, Marcelo Camargo Severo de; Scandian, Cherlio

DOI

10.5151/5463-5463-16674

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Resumo

The study of wear has focused much effort on reproducing, in laboratory, micromechanisms identified on industrial applications. To do so, many tribometers were developed, but not much attention has been given to correlation among such variety of abrasive wear tests results. This study aims to compare the behavior of four different wear tests, three of them classified as severe abrasive wear tests (pin- on-disk, single pass pendulum and scratch test) and one as a non severe abrasive wear test (LTM test). High chromium white cast irons alloys and Al-Si alloys (the latter collected from the literature) were used in different tribological conditions (contact pressure, interface fluid, velocity, abrasive size and shape). It was observed that the wear resistance classification offered by the single pass pendulum and the LTM test were the same and was inversed with the classification offered by the scratch and pin on disk test. The single pass pendulum and the scratch test offered less data dispersion and faster results, therefore, these tests should be more attractive. The wear rate behavior corroborates the models presented by Zum Gahr regarding the force transferred on the contact region named: constant depth and constant load. For the constant load system, the product K*q, proprieties of the material presented by U. BRYGGMAN et al., explains better the wear rate behavior when compared to the indentation hardness.

 

The study of wear has focused much effort on reproducing, in laboratory, micromechanisms identified on industrial applications. To do so, many tribometers were developed, but not much attention has been given to correlation among such variety of abrasive wear tests results. This study aims to compare the behavior of four different wear tests, three of them classified as severe abrasive wear tests (pin- on-disk, single pass pendulum and scratch test) and one as a non severe abrasive wear test (LTM test). High chromium white cast irons alloys and Al-Si alloys (the latter collected from the literature) were used in different tribological conditions (contact pressure, interface fluid, velocity, abrasive size and shape). It was observed that the wear resistance classification offered by the single pass pendulum and the LTM test were the same and was inversed with the classification offered by the scratch and pin on disk test. The single pass pendulum and the scratch test offered less data dispersion and faster results, therefore, these tests should be more attractive. The wear rate behavior corroborates the models presented by Zum Gahr regarding the force transferred on the contact region named: constant depth and constant load. For the constant load system, the product K*q, proprieties of the material presented by U. BRYGGMAN et al., explains better the wear rate behavior when compared to the indentation hardness.

Palavras-chave

Tribometer; Wear rate; Correlation.

Tribometer; Wear rate; Correlation.