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Type: Artigo de periódico
Title: Implant Test And Acoustic Emission Technique Used To Investigate Hydrogen Assisted Cracking In The Melted Zone Of A Welded Hsla-80 Steel [uso Del Ensayo De Implante Y La Tecnica De Emision Acustica Para Estudiar El Agrietamiento Asistido Por Hidrogeno En La Zona Fundida En La Soldadura De Un Acero Hsla-80]
Author: Fals H.C.
Trevisan R.E.
Abstract: Weld metal hydrogen assisted cracking was studied using two flux cored wire (AWS E 70T-5 and AWS E 120 T5-K4) and a mixture gas of CO2 + 5% H2 to induce high values of diffusible hydrogen in high strength low alloy steel (HSLA-80) weldments. An Acoustical Emission Measurement System (AEMS) RMS voltmeter was coupled to the implant test (NF 89-100) apparatus to determine energy, amplitude and event numbers of signal. All cracks were initiated in the partially melted zone and propagated into the coarse-grained region of the heat affected zone when E 70 T5 consumable was used, and the quasi-cleavage fracture mode was predominant. When E 120 T5 K4 consumable was used the cracks propagated vertically across the fusion zone, and a mixed fracture mode was the most important. A significant relationship between acoustic emission parameters and fracture modes was found.
Editor: Centro Nacional de Investigaciones Metalurgicas, Madrid, Spain
Rights: aberto
Identifier DOI: 
Date Issue: 1999
Appears in Collections:Unicamp - Artigos e Outros Documentos

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