Corrosion-induced changes on Hertzian contact damage in cemented carbides

This paper aims to assess the effect of shape irregularity on contact damage in a brittle coating on a stiff metal substrate. Hertzian contact damage in a dental porcelain layer over a Ni-Cr alloy substrate in both curved and flat geometries was studied using finite element analysis and experimental investigation. Three failure modes were examined with varying porcelain layer thickness: cone cracking at the top surface of the porcelain, interface cracking at the layer/substrate interface and plastic deformation below the contact area in the substrate. It is shown that curvature has very little effect on the initiation of surface cone cracks in this system, but substantial effect on the initiation of interface radial cracks. In particular, curvature reduces the critical load for the onset of interface cracks

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Simulation of the Hertzian contact damage in ceramics

Modelling and Simulation in Materials Science and Engineering ◽

10.1088/0965-0393/11/4/305 ◽

2003 ◽

Vol 11 (4) ◽

pp. 477-486 ◽

Cited By ~ 3

Author(s):

V Licht ◽

E Ernst ◽

N Huber

Keyword(s):

Hertzian Contact ◽

Contact Damage

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Hertzian Contact Damage in Porous Alumina Ceramics

Journal of the American Ceramic Society ◽

10.1111/j.1151-2916.1997.tb02940.x ◽

2005 ◽

Vol 80 (4) ◽

pp. 1027-1031 ◽

Cited By ~ 43

Author(s):

Bruno A. Latella ◽

Brian H. OConnor ◽

Nitin P. Padture ◽

Brian R. Lawn

Keyword(s):

Porous Alumina ◽

Hertzian Contact ◽

Alumina Ceramics ◽

Contact Damage

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Fatigue and Contact Damage of Layered Machinable Ti3SiC2 Ceramics

Materials Science Forum ◽

10.4028/www.scientific.net/msf.449-452.849 ◽

2004 ◽

Vol 449-452 ◽

pp. 849-852

Author(s):

Zhong Guang Wang ◽

H. Zhang ◽

Q.S. Zang ◽

Zhe Feng Zhang ◽

Z.M. Sun

Keyword(s):

Damage Evolution ◽

Fracture Behavior ◽

Physical And Mechanical Properties ◽

High Strength ◽

Strength Degradation ◽

Hertzian Contact ◽

Contact Damage ◽

The Past ◽

Deformation And Fracture ◽

Crack Growth Rates

Ti3SiC2has been widely investigated for their intriguing physical and mechanical properties [1]. In the past decades, dense and pure polycrystalline Ti3SiC2has been fabricated by some techniques [1,2]. Studies on deformation and fracture behavior at elevated temperature showed that Ti3SiC2exhibited substantial plasticity with high strength [3]. It is pointed out that Ti3SiC2can be possibly used for some contact applications, such as bearings, for its relative high compression strength, self-lubricating and machinability [1]. In the present paper, fatigue crack-growth rates and Hertzian contact damage of Ti3SiC2were studied. Shielding ability of Ti3SiC2was investigated specially in the small crack region. Damage evolution and strength degradation under Hertzian contact were studied to reveal damage behavior and mechanisms in Ti3SiC2.

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