《TOFD检测（双语）》课件-29.相关显示和非相关显示

TOFD数据的相关显示和非相关显示

RelevantandNon-RelevantIndicationsinTOFDDataTOFD检测技术

TOFDTestingTechnology定义

Definitions1相关显示的分类

ClassificationofRelevantIndications2非相关显示的分类

ClassificationofNon-RelevantIndications3知识目标

Knowledgeobjectives教学目标

Teachingobjectives相关显示

RelevantIndicationsTOFD图像中，由缺陷引起的显示。

ArelevantindicationisanindicationinaTOFDimagethatiscausedbyadefect.非相关显示

Non-RelevantIndicationsTOFD图像中，由于工件结构（例如焊缝余高或根部）或者材料冶金成分的偏差（例如铁素体基材和奥氏体覆盖层的界面）引起的显示为非相关显示。

Anon-relevantindicationisanindicationinaTOFDimagethatiscausedbythegeometryoftheworkpiece,suchasweldreinforcementorrootgeometry,orbyametallurgicalinterface,suchastheinterfacebetweenaferriticbasematerialandanausteniticcladding.定义

Definitions相关显示分为：表面开口型缺陷显示和埋藏型缺陷显示。

Relevantindicationsareclassifiedassurface-breakingdefectindicationsandburieddefectindications.表面开口型缺陷显示

Surface-BreakingDefectIndications扫查面开口型

DefectsOpentotheScanningSurface底面开口型

DefectsOpentotheBackWall穿透型

Through-WallDefects埋藏型

缺陷显示

BuriedDefectsDefectIndications点状显示

PointIndications线状显示

LinearIndications条状显示

ElongatedIndications相关显示的分类

ClassificationofRelevantIndications12扫查面开口型：

DefectsOpentotheScanningSurface:该类型通常显示为直通波的减弱、消失或变形，仅可观察到一个端点（缺陷下端点）产生的衍射信号，且与直通波同相位。

Thistypeofdefectgenerallycausesthelateralwavetoweaken,disappear,orbecomedistorted.Onlythediffractedsignalfromthelowerdefecttipcannormallybeobserved,andithasthesamephaseasthelateralwave.相关显示的分类

ClassificationofRelevantIndications1.表面开口型缺陷显示

Surface-BreakingDefectIndications底面开口型：

DefectsOpentotheBackWall:该类型通常显示为底面反射波的减弱、消失、延迟或变形，仅可观察到一个端点（缺陷上端点）产生的衍射信号，且与直通波反相位。

Thistypeofdefectgenerallycausestheback-wallechotoweaken,disappear,becomedelayed,orbecomedistorted.Onlythediffractedsignalfromtheupperdefecttipcannormallybeobserved,anditis180°outofphasewiththelateralwave.1.表面开口型缺陷显示

Surface-BreakingDefectIndications相关显示的分类

ClassificationofRelevantIndications穿透型：

Through-WallDefects:该类型显示为直通波和底面反射波同时减弱或消失，可沿壁厚方向产生多处衍射信号。

Thistypeofdefectcausesboththelateralwaveandtheback-wallechotoweakenordisappear.Multiplediffractedsignalsmaybegeneratedthroughthewallthickness.1.表面开口型缺陷显示

Surface-BreakingDefectIndications相关显示的分类

ClassificationofRelevantIndications点状显示：

PointIndications:该类型显示为双曲线弧状，且与拟合弧形光标重合，无可测量长度和高度。

Thistypeofindicationappearsasahyperbolicarcthatcoincideswiththefitted-arccursor.Ithasnomeasurablelengthorheight.相关显示的分类

ClassificationofRelevantIndications2.埋藏型缺陷显示

BuriedDefectIndications线状显示：

LinearIndications:该类型显示为细长状，无可测量高度。

Thistypeofindicationappearsasanarrow,elongatedindicationandhasnomeasurableheight.2.埋藏型缺陷显示

BuriedDefectIndications相关显示的分类

ClassificationofRelevantIndications条状显示：

ElongatedIndications:该类型显示为长条状，可见上、下两端产生的衍射信号。

Thistypeofindicationappearsasanelongatedband,withdiffractedsignalsvisiblefromboththeupperandlowerdefecttips.1234相关显示的分类

ClassificationofRelevantIndications2.埋藏型缺陷显示

BuriedDefectIndications非相关显示：由于工件的外形结构或材料冶金等非缺陷引起的显示。

Non-relevantindicationsarecausedbynon-defectfeatures,suchasthegeometryoftheworkpieceormetallurgicalinterfacesinthematerial.表面几何结构，如焊缝余高和根部几何形状引起的显示；

Indicationscausedbysurfacegeometry,suchasweldreinforcementandweld-rootgeometry;材料治金几何结构，如堆焊层与金属母材结合面引起的显示。

Indicationscausedbymetallurgicalinterfaces,suchastheinterfacebetweenaweldoverlayandthebasemetal.非相关显示的分类

ClassificationofNon-RelevantIndications01了解TOFD数据的相关显示和非相关显示定义。

UnderstandtheDefinitionsofRelevantandNon-RelevantIndicationsinTOFDData.02了解相关显示的分类及其特点和非相关显示分类及其特点。

UnderstandtheClassificationandCharacteristicsofRelevantandNon-Relevant