Acoustic Emission Response of 316LN Welded Joint during Intergranular Corrosion

Meng Yu Chai; Quan Duan; Zao Xiao Zhang

doi:10.4028/www.scientific.net/MSF.809-810.401

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HomeMaterials Science ForumMaterials Science Forum Vols. 809-810Acoustic Emission Response of 316LN Welded Joint...

Acoustic Emission Response of 316LN Welded Joint during Intergranular Corrosion

Abstract:

The acoustic emission (AE) response of 316LN welded joint during intergranular corrosion (IGC) was investigated in this study. The boiling nitric acid method was chosen to provide the IGC environment and AE signals were detected by Macro-SAMOS AE testing system. The metallographic structures and AE results were studied and analyzed in detail. The results show that the IGC process of 316LN welded joint can generate many AE signals and the AE activity is high. The AE amplitude is below 35dB and mainly ranges from 25dB to 34dB. Two types of AE signals are obtained and both the frequency peaks are 50 kHz. It is believed that grain boundary corrosion, ferrite corrosion and separation of grains are the possible AE sources.

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2014 China Functional Materials Technology and Industry Forum

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Periodical:

Materials Science Forum (Volumes 809-810)

Pages:

401-405

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.809-810.401

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Online since:

December 2014

Authors:

Meng Yu Chai*, Quan Duan, Zao Xiao Zhang

Keywords:

316LN, Acoustic Emission, Intergranular Corrosion, Nuclear Power, Welded Joint

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