【英文标准名称】:StandardTestMethodforMeasuringMechanisticAspectsofScratch/MarBehaviorofPaintCoatingsbyNanoscratching
【原文标准名称】:微小划痕法测量机械方面的涂料覆层抗划痕/损伤性能的标准试验方法
【标准号】:ASTMD7187-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D01.23
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:覆层;测量;涂料;划痕;试验
【英文主题词】:coatings;gloss;marororganiccoatingmarresistance;scratchresistance
【摘要】:1.1Thistestmethodcoversthenanoscratchmethodfordeterminingtheresistanceofpaintcoatingsonsmoothflatsurfacestoscratch/mar.1.2Previousmethodsusedinscratch/marevaluationfirstphysicallyscratchormarasamplessurfacewithmultiplecontactcutting,andthenusevisualinspectiontoassignaranking.Ithasbeenrecognizedthatlossofappearanceismainlyduetosurfacedamagescreated.Thephilosophyofthismethodistoquantitativelyandobjectivelymeasurescratch/marbehaviorbymakingtheevaluationprocesstwostepswithemphasisonsurfacedamages.Steponeistofindtherelationshipbetweendamageshapeandsizeandexternalinput(suchasforces,contactgeometry,anddeformation).Steptwoistorelatedamageshapeandsizetovisuallossofluster.Thefirststepiscoveredbythismethod;inaddition,asurveyintheappendixprovidesanexampleofanexperimenttorelatethedamagetothechangeinluster.1.3Therearethreeelementarydeformationmechanisms:elasticdeformation,plasticdeformationandfracture;onlythelattertwobothcontributesignificantlytomar.Thismethodevaluatesscratch/marbasedonthelattertwodamagemechanisms.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A29
【国际标准分类号】:87_040
【页数】:11P.;A4
【正文语种】:


Product Code:SAE AMS4085
Title:Aluminum Alloy Sheet, 5.7Zn - 2.2Mg - 1.6Cu - 0.22Cr (7475-T761) Solution Heat Treated and Overaged
Issuing Committee:Ams D Nonferrous Alloys Committee
Scope:This specification covers an aluminum alloy in the form of sheet.