ASTM F1160 Test Fikstürü

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ASTM F1160 – Standard Test Method for Shear and Bending Fatigue Testing of Calcium Phosphate and Metallic Medical and Composite Calcium Phosphate/ Metallic Coatings

 

ASTM F1160 covers the procedure for determining the shear and bending fatigue performance of calcium phosphate coatings and of porous and nonporous

metallic coatings and for determining the bending fatigue performance of metallic coatings over sprayed with calcium phosphate.

This test method has been established based on plasma-sprayed titanium and plasma-sprayed hydroxylapatite coatings.

The efficacy of this test method for other coatings has not been established.

In the shear fatigue mode, this test method evaluates the adhesive and cohesive properties of the coating on a metallic substrate.

In the bending fatigue mode, this test method evaluates both the adhesion of the coating as well as the effects that the coating may have on the substrate material.

These methods are limited to testing in air at ambient temperature.

These test methods are not intended for application in fatigue tests of components or devices; however, the test method which most closely replicates the actual

loading configuration is preferred.

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ASTM F1160 / Significance and Use

The shear and bending fatigue tests are used to determine the effect of variations in material, geometry, surface condition, stress, and so forth, on the fatigue

resistance of coated metallic materials subjected to direct stress for up to 107 cycles.

These tests may be used as a relative guide to the selection of coated materials for service under condition of repeated stress.

In order that such basic fatigue data be comparable, reproducible, and can be correlated among laboratories, it is essential that uniform fatigue practices be

established.

The results of the fatigue test may be used for basic material property design.

Actual components should not be tested using these test methods.

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ASTM F1160 / APPARATUS

Shear Fatigue Test Grips

General—Various types of grips may be used to transmit the load to the specimens by the testing machine.

To ensure axial shear stress, it is important that the specimen axis coincide with the centerline of the heads of the testing machine and that the coating test plane

be parallel to the axial force.

Any departure from this requirement (that is, any eccentric loading) will introduce bending stresses that are not included in the usual stress calculation

(force/cross-sectional area).

*** Before conducting ASTM F1160 , it is important to read the entire specification. Standards can be obtained from appropriate standard authorities.

 

***PARSROS  offers several types of grips and fixtures which will enable you to perform a variety of tests

  that are accurate and repeatable.