{"id":4073,"date":"2025-02-26T23:30:37","date_gmt":"2025-02-26T23:30:37","guid":{"rendered":"https:\/\/becacompany.ticgeek.com\/?page_id=4073"},"modified":"2025-05-14T17:59:49","modified_gmt":"2025-05-14T17:59:49","slug":"time-of-flight-diffraction","status":"publish","type":"page","link":"https:\/\/becacompany.com\/fr\/time-of-flight-diffraction\/","title":{"rendered":"Diffraction du temps de vol"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"4073\" class=\"elementor elementor-4073\">\n\t\t\t\t<div class=\"elementor-element elementor-element-bbd255a e-flex e-con-boxed wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no e-con e-parent\" data-id=\"bbd255a\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-97dcfa0 elementor-widget elementor-widget-porto_ultimate_heading\" data-id=\"97dcfa0\" data-element_type=\"widget\" data-widget_type=\"porto_ultimate_heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"porto-u-heading  porto-u-ad87e2eaf3f9c495180fe0156ddf3eb0\"><div class=\"porto-u-sub-heading\" style=\"\"><p>La diffraction du temps de vol (TOFD) est une m\u00e9thode avanc\u00e9e d'inspection par ultrasons qui s'appuie sur les m\u00e9thodologies UT existantes, apportant ainsi une toute nouvelle gamme de capacit\u00e9s de test et de d\u00e9tection au premier plan du CND.<br \/>Alors que les ultrasons conventionnels utilisent les ondes de cisaillement\/transversales comme mode de d\u00e9tection principal, le TOFD utilise les ondes longitudinales comme mode de d\u00e9tection principal. Des capteurs \u00e0 ultrasons sont plac\u00e9s de chaque c\u00f4t\u00e9 de la soudure. Un capteur transmet le faisceau ultrasonore dans le mat\u00e9riau et l'autre capteur re\u00e7oit les ultrasons r\u00e9fl\u00e9chis et diffract\u00e9s des anomalies et des r\u00e9flecteurs g\u00e9om\u00e9triques.<\/p><p>\u00a0<\/p><\/div><style>.porto-u-ad87e2eaf3f9c495180fe0156ddf3eb0.porto-u-heading{text-align:left}<\/style><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-31cb59b e-flex e-con-boxed wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no e-con e-parent\" data-id=\"31cb59b\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ceb4c1c elementor-widget elementor-widget-porto_ultimate_heading\" data-id=\"ceb4c1c\" data-element_type=\"widget\" data-widget_type=\"porto_ultimate_heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"porto-u-heading  porto-u-ad87e2eaf3f9c495180fe0156ddf3eb0\"><div class=\"porto-u-sub-heading\" style=\"\"><h3><strong>Avantages de ToFD :<\/strong><\/h3><ul><li>Bas\u00e9 sur la diffraction, donc relativement indiff\u00e9rent aux angles de biseau de soudure et \u00e0 l'orientation des d\u00e9fauts<\/li><li>Fournit un excellent enregistrement de l'\u00e9tat du r\u00e9cipient ou du tuyau \u00e0 la naissance.<\/li><li>Peut \u00e9galement \u00eatre utilis\u00e9 pour les d\u00e9fauts en service, tels que la fissuration, la corrosion, l'\u00e9rosion, etc. Poss\u00e8de une limitation de temp\u00e9rature tr\u00e8s \u00e9lev\u00e9e (700 F), avec une l\u00e9g\u00e8re perte de sensibilit\u00e9.<\/li><li>D\u00e9tecte les d\u00e9fauts quelle que soit leur orientation dans la soudure.<\/li><li>Peut \u00eatre appliqu\u00e9 sans qu'il soit n\u00e9cessaire de fermer d'autres activit\u00e9s dans la zone (ce que RT exige).<\/li><li>Peut \u00eatre appliqu\u00e9 pendant le soudage ou imm\u00e9diatement apr\u00e8s la fin de la soudure, permettant une d\u00e9termination instantan\u00e9e de la qualit\u00e9 de la soudure.<\/li><li>Permet de surveiller la croissance des d\u00e9fauts pour les d\u00e9cisions d'ex\u00e9cution\/r\u00e9paration.<\/li><li>Utilise l'heure d'arriv\u00e9e des signaux re\u00e7us des pointes de fissures pour un positionnement et un dimensionnement pr\u00e9cis des d\u00e9fauts<\/li><li>Rapide \u00e0 installer et \u00e0 r\u00e9aliser une inspection, car un seul faisceau offre une grande zone de couverture<\/li><li>Num\u00e9risation rapide avec imagerie et enregistrement complet des donn\u00e9es<\/li><li>Peut \u00e9galement \u00eatre utilis\u00e9 pour d\u00e9tecter des zones de perte de m\u00e9tal de forme irr\u00e9guli\u00e8re lors des inspections de corrosion<\/li><\/ul><p>\u00a0<\/p><\/div><style>.porto-u-ad87e2eaf3f9c495180fe0156ddf3eb0.porto-u-heading{text-align:left}<\/style><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b830cb4 e-flex e-con-boxed wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no e-con e-parent\" data-id=\"b830cb4\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-7ace1cc e-con-full e-flex wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no e-con e-child\" data-id=\"7ace1cc\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-598231c elementor-widget elementor-widget-image\" data-id=\"598231c\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/becacompany.com\/wp-content\/uploads\/2025\/03\/1-15-600x600-1.png\" class=\"attachment-large size-large wp-image-4342\" alt=\"\" srcset=\"https:\/\/becacompany.com\/wp-content\/uploads\/2025\/03\/1-15-600x600-1.png 600w, https:\/\/becacompany.com\/wp-content\/uploads\/2025\/03\/1-15-600x600-1-400x400.png 400w, https:\/\/becacompany.com\/wp-content\/uploads\/2025\/03\/1-15-600x600-1-560x560.png 560w, https:\/\/becacompany.com\/wp-content\/uploads\/2025\/03\/1-15-600x600-1-367x367.png 367w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-05750fb e-con-full e-flex wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no e-con e-child\" data-id=\"05750fb\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-594a47d elementor-widget elementor-widget-image\" data-id=\"594a47d\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/becacompany.com\/wp-content\/uploads\/2025\/03\/2-17-600x600-1.jpg\" class=\"attachment-large size-large wp-image-4343\" alt=\"\" srcset=\"https:\/\/becacompany.com\/wp-content\/uploads\/2025\/03\/2-17-600x600-1.jpg 600w, https:\/\/becacompany.com\/wp-content\/uploads\/2025\/03\/2-17-600x600-1-400x400.jpg 400w, https:\/\/becacompany.com\/wp-content\/uploads\/2025\/03\/2-17-600x600-1-560x560.jpg 560w, https:\/\/becacompany.com\/wp-content\/uploads\/2025\/03\/2-17-600x600-1-367x367.jpg 367w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c2e5817 e-con-full e-flex wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no e-con e-child\" data-id=\"c2e5817\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-deadce0 elementor-widget elementor-widget-image\" data-id=\"deadce0\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/becacompany.com\/wp-content\/uploads\/2025\/03\/Untitled-design-600x600-1.png\" class=\"attachment-large size-large wp-image-4344\" alt=\"\" srcset=\"https:\/\/becacompany.com\/wp-content\/uploads\/2025\/03\/Untitled-design-600x600-1.png 600w, https:\/\/becacompany.com\/wp-content\/uploads\/2025\/03\/Untitled-design-600x600-1-400x400.png 400w, https:\/\/becacompany.com\/wp-content\/uploads\/2025\/03\/Untitled-design-600x600-1-560x560.png 560w, https:\/\/becacompany.com\/wp-content\/uploads\/2025\/03\/Untitled-design-600x600-1-367x367.png 367w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Time of Flight Diffraction (TOFD) is an advanced method of Ultrasonic inspection that leverages on existing UT methodologies thereby bringing a whole new range of testing and detection capabilities to the NDT forefront.Whilst conventional ultrasonic uses shear \/ transverse waves as the primary mode of detection, TOFD uses longitudinal waves as the primary detection mode. Ultrasonic sensors are placed on each side of the weld. One sensor transmits the ultrasonic beam into the material and the other sensor receives both reflected and diffracted ultrasound from anomalies and geometric reflectors. \u00a0 Benefits of ToFD\u00a0: Based on diffraction, so relatively indifferent to weld bevel angles and flaw orientation Providing an excellent record of vessel or pipe condition at birth. Can also be used for in-service defects, such as cracking, corrosion, erosion, etc. Has a very high temperature limitation (700 F), with slight loss in sensitivity. Detects flaws regardless of their orientation within the weld. Can be applied without the need to shut down other activities in the area (which RT demands). Can be applied either during welding or immediately after completion of the weld, allowing instant determination of weld quality. Allows flaw growth monitoring for run\/repair decisions. Uses time of arrival of signals received from crack tips for accurate defect positioning and sizing Quick to set up and perform an inspection, as a single beam offers a large area of coverage Rapid scanning with imaging and full data recording Can also be used for detecting irregularly shaped areas of metal loss during corrosion inspections \u00a0<\/p>","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-4073","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/becacompany.com\/fr\/wp-json\/wp\/v2\/pages\/4073","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/becacompany.com\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/becacompany.com\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/becacompany.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/becacompany.com\/fr\/wp-json\/wp\/v2\/comments?post=4073"}],"version-history":[{"count":10,"href":"https:\/\/becacompany.com\/fr\/wp-json\/wp\/v2\/pages\/4073\/revisions"}],"predecessor-version":[{"id":5755,"href":"https:\/\/becacompany.com\/fr\/wp-json\/wp\/v2\/pages\/4073\/revisions\/5755"}],"wp:attachment":[{"href":"https:\/\/becacompany.com\/fr\/wp-json\/wp\/v2\/media?parent=4073"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}