DIN EN ISO 14577-4-2007 金属材料.硬度和材料参数用仪器压痕试验.第4部分:金属和非金属覆层试验方法(ISO 14577-4-2007)

标准号：DIN EN ISO 14577-4-2007
中文标准名称：金属材料.硬度和材料参数用仪器压痕试验.第4部分:金属和非金属覆层试验方法(ISO 14577-4-2007)
英文标准名称：Metallic materials - Instrumented indentation test for hardness and materials parameters - Part 4: Test method for metallic and non-metallic coatings (ISO 14577-4:2007); English version of DIN EN ISO 14577-4:2007-08
标准类型：H22
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：H22
国际标准分类号：77.040.10
引用标准：ISO 1514;ISO 2808;ISO 3270;ISO 4287;EN ISO 14577-1;EN ISO 14577-2;EN ISO 14577-3
适用范围：This part of ISO 14577 specifies a method for testing coatings which is particularly suitable for testing in thenano/micro range applicable to thin coatings.This test method is limited to the examination of single layers when the indentation is carried out normal to thetest piece surface, but graded and multilayer coatings can also be measured in cross-section if the thicknessof the individual layers or gradations is greater than the spatial resolution of the indentation process.The test method is not limited to any particular type of material. Metallic, non-metallic and organic coatings areincluded in the scope of this part of ISO 14577.The application of this part of ISO 14577 regarding measurement of hardness is only possible if the indenter isa pyramid or a cone with a radius of tip curvature small enough for plastic deformation to occur within thecoating. The hardness of visco-elastic materials, or materials exhibiting significant creep will be stronglyaffected by the time taken to perform the test.NOTE 1 ISO 14577-1, ISO 14577-2 and ISO 14577-3 define usage of instrumented indentation testing of bulkmaterials over all force and displacement ranges.NOTE 2 The application of the method of this part of ISO 14577 is not needed if the indentation depth is so small thatin any possible case a substrate influence can be neglected and the coating can be considered as a bulk material. Limitsfor such cases are given.NOTE 3 The analysis used here does not make any allowances for pile-up or sink-in of indents. Use of Atomic ForceMicroscopy (AFM) to assess the indent shape allows the determination of possible pile-up or sink-in of the surface aroundthe indent. These surface effects result in an under-estimate (pile-up) or over-estimate (sink-in) of the contact area in theanalysis and hence may influence the measured results. Pile-up generally occurs for fully work-hardened materials. Pile-up of soft, ductile materials is more likely for thinner coatings due to the constraint of the stresses in the zone of plasticdeformation in the coating. It has been reported that the piled up material results in an effective increase of the contactarea for the determination of hardness, while the effect is less pronounced for the determination of indentation modulus,since the piled up material behaves less rigidly [1], [2].