Friction coefficient and wear mode transition in micro-scale abrasion tests

Cozza, Ronaldo Câmara; Tanaka, Deniol Katsuki; Souza, R.M.

doi:10.1016/j.triboint.2011.08.006

Cited by 41 publications

(45 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…De fato, as primeiras pesquisas publicadas que realmente mediram, na prática, o coeficiente de atrito no sistema tribológico "esfera -partículas abrasivas -corpo--de-prova" foram realizadas pelos Professores Ronaldo Câmara Cozza, Deniol Katsuki Tanaka e Roberto Martins de Souza [4, 13,14]. Com isso, continuando os trabalhos iniciados no então LFS -Laboratório de Fenômenos de Superfície/USP, o objetivo deste trabalho é apresentar uma configuração de equipamento de ensaio de desgaste micro-abrasivo por esfera rotativa livre, hábil a medir o coeficiente de atrito no sistema tribológico "esfera -partí-culas abrasivas -corpo-de-prova".…”

Section: Equipamentos "Ball-cratering": Revisão Literáriaunclassified

“…Tanto o comportamento do volume de desgaste quanto o comportamento do coeficiente de atrito apresentaram concordância qualitativa com a literatura, em que V = f(S) mostra-se linear, indicando a obtenção do Regime Permanente de Desgaste, e µ = f(t) tende a manter-se constante com o tempo de ensaio, como prediz a literatura [4, 13,14]. …”

Section: Conclusõesunclassified

“…Percebe-se que, independente do tempo de ensaio, o coeficiente de atrito manteve-se, aproximadamente, constante, concordando, qualitativamente, com a literatura [13,14].…”

Section: Coeficiente De Atritounclassified

See 2 more Smart Citations

Projeto, Construção E Validação De Um Equipamento De Ensaio De Desgaste Micro-Abrasivo Por Esfera Rotativa Livre Para a Medição Do Coeficiente De Atrito

Cozza¹,

Suzuki²,

Schön³

2014

TMM

View full text Add to dashboard Cite

ResumoO propósito deste trabalho é apresentar uma configuração de equipamento "ball-cratering" para a medição do coeficiente de atrito. Duas células de carga foram utilizadas, de forma a medir, em tempo real, as forças "normal" e "tangencial" durante os ensaios e, a partir destas, calcular o coeficiente de atrito desenvolvido. Para a validação do equipamento projetado e construído, ensaios foram conduzidos sob um corpo-de-prova de aço-ferramenta AISI H10 (temperado e revenido) junto à uma esfera de aço AISI 52100 (temperado e revenido) e solução abrasiva, composta por SiC e água destilada; diferentes valores de força normal e distância de deslizamento foram definidos. Os resultados mostraram que, devido às próprias condições de ensaio, agiu o desgaste abrasivo por rolamento e, em relação ao equipamento desenvolvido, o mesmo apresentou excelente funcionalidade e reprodutibilidade, tanto em relação à formação das calotas de desgaste quanto à medição do coeficiente de atrito. Palavras-chave: Desgaste; Abrasão; Ensaio de desgaste micro-abrasivo por esfera rotativa. DESIGN, BUILDING AND VALIDATION OF A BALL-CRATERING WEAR TEST EQUIPMENT BY FREE-BALL TO MEASURE THE COEFFICIENT OF FRICTION AbstractThe purpose of this work is to present a ball-cratering equipment configuration to measure the coefficient of friction. Two load cells were used to measure, in real time, the "normal" and "tangential" forces during the experiments to calculate the coefficient of friction. Micro-abrasive wear tests were conducted on an AISI H10 tool steel specimen, with a ball of AISI 52100 steel and an abrasive slurry, prepared with SiC and distilled water; different values of normal force and sliding distance were defined for the wear experiments to investigate and validate the constructed machine. The results showed that due to test conditions, it was observed the occurrence of rolling abrasion. The equipment showed excellent functionality and reproducibility, in terms of formation of the wear craters and measurement of the coefficient of friction.

show abstract

Section: Equipamentos "Ball-cratering": Revisão Literáriaunclassified

Section: Conclusõesunclassified

See 1 more Smart Citation

Projeto, Construção E Validação De Um Equipamento De Ensaio De Desgaste Micro-Abrasivo Por Esfera Rotativa Livre Para a Medição Do Coeficiente De Atrito

Cozza¹,

Suzuki²,

Schön³

2014

TMM

View full text Add to dashboard Cite

show abstract

“…1) and the wear behavior is analyzed based on the dimensions of the crater formed during the test. This test has been applied in the study of the abrasive wear of metallic [1][2][3][4] and non-metallic [5][6][7][8][9] materials and, depending on the equipment configuration, it is possible to apply normal forces (N) from N = 0.01 N [10] to N = 5 N [11]. The test is usually conducted in one of two basic configurations [12]: (i) free-ball and (ii) fixed-ball.…”

Section: Introductionmentioning

confidence: 99%

“…Another point related to this increase in depth of penetration is the evolution of the pressure (P) throughout one of the tests. Since tests are conducted with constant normal force [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] and the total area of the crater gradually increases, it is possible to anticipate a variation on the pressure developed along the test, which may affect the abrasive wear modes [14]. Greek letters b…”

Section: Introductionmentioning

confidence: 99%

Effect of sliding distance on abrasive wear modes transition

Cozza

2015

Journal of Materials Research and Technology

View full text Add to dashboard Cite

j m a t e r r e s t e c h n o l . 2 0 1 5;4(2):144-150 w w w . j m r t . c o m . b r Two-body abrasion Three-body abrasion Micro-scale abrasion a b s t r a c tThis work presents a study on the effect of sliding distance on abrasive wear modes transition in micro-abrasive wear. Ball-cratering wear tests were conducted with specimens of P20 cemented carbide (WC-Co) and M2 tool steel, balls of 52100 steel and abrasive slurry prepared with SiC particles and distilled water. Results were analyzed in terms of A g (area with grooving abrasion) and A r (area with rolling abrasion) as a function of sliding distance and pressure; they have indicated that with the increasing of sliding distance and, a consequent decreasing of pressure, there is the transition from grooving abrasion to rolling abrasion.

show abstract

Characterising the friction and wear behaviour of lubricated metal‐metal pairings with an optical online particle detection system

Krasmik

Röbken²,

Martin³

et al. 2017

Lubrication Science

View full text Add to dashboard Cite

In this study, a simple ball‐on‐prism test set‐up is combined with an optical online wear particle detection system. The set‐up is used to study the friction and wear characteristics of some exemplary oil lubricated metal‐metal pairings. In addition to the time‐resolved evolutions of the coefficient of friction and the volumetric wear, the number of wear particles, the particle sizes and the particle shapes are obtained during the test by using an online particle detection system. The number of small (<5 μm) wear particles increases steadily during the tests, while the number of larger (>10 μm) particles only increases during the running‐in period and remains almost constant afterwards. Simultaneous drops in the curves for the coefficient of friction and the trend curves for the number of wear particles indicate a possible interrelation. The individual curves for the different particle sizes suggest that mainly small particles (<5 μm) contribute to that relation. © 2017 John Wiley & Sons, Ltd.

show abstract

Friction coefficient and wear mode transition in micro-scale abrasion tests

Cited by 41 publications

References 63 publications

Projeto, Construção E Validação De Um Equipamento De Ensaio De Desgaste Micro-Abrasivo Por Esfera Rotativa Livre Para a Medição Do Coeficiente De Atrito

Projeto, Construção E Validação De Um Equipamento De Ensaio De Desgaste Micro-Abrasivo Por Esfera Rotativa Livre Para a Medição Do Coeficiente De Atrito

Effect of sliding distance on abrasive wear modes transition

Characterising the friction and wear behaviour of lubricated metal‐metal pairings with an optical online particle detection system

Contact Info

Product

Resources

About