標準號：DIN EN ISO 14577-4-2007
中文標準名稱：金屬材料.硬度和材料參數用儀器壓痕試驗.第4部分:金屬和非金屬覆層試驗方法(ISO 14577-4-2007)
英文標準名稱：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
標準類型：H22
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：H22
國際標準分類號：77.040.10
引用標準：ISO 1514;ISO 2808;ISO 3270;ISO 4287;EN ISO 14577-1;EN ISO 14577-2;EN ISO 14577-3
適用范圍：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].