NDLI: Effect of Microstructure on Stress Corrosion Cracking Behaviour of High Nitrogen Stainless Steel Gas Tungsten Arc Welds

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Effect of Microstructure on Stress Corrosion Cracking Behaviour of High Nitrogen Stainless Steel Gas Tungsten Arc Welds

Content Provider	Scilit
Author	Mohammed, Raffi Rao, K. Srinivasa Reddy, G. Madhusudhan
Copyright Year	2018
Description	Journal: Iop Conference Series: Materials Science and Engineering Present work is aimed to improve stress corrosion cracking resistance of high nitrogen steel and its welds. An attempt to weld high nitrogen steel of 5 mm thick plate using gas tungsten arc welding (GTAW) with three high strength age hardenable fillers i.e., 11-10 PH filler, PH 13- 8Mo and maraging grade of MDN 250 filler is made. Welds were characterized by optical microscopy and scanning electron microscopy. Vickers hardness testing of the welds was carried out to study the mechanical behaviour of welds. Potentio-dynamic polarization studies were done to determine pitting corrosion resistance in aerated 3.5% NaCl solution. Stress corrosion cracking (SCC) testing was carried out using constant load type machine with applied stress of 50% yield strength and in 45% $MgCl_{2}$ solution boiling at 155°C. The results of the present investigation established that improvement in resistance to stress corrosion cracking was observed for PH 13- 8Mo GTA welds when compared to 11-10 PH and MDN 250 GTA welds. However, All GTA welds failed in the weld interface region. This may be attributed to relatively lower pitting potential in weld interface which acts as active site and the initiation source of pitting.
Related Links	https://iopscience.iop.org/article/10.1088/1757-899X/330/1/012015/pdf
ISSN	17578981
e-ISSN	1757899X
DOI	10.1088/1757-899x/330/1/012015
Journal	Iop Conference Series: Materials Science and Engineering
Issue Number	1
Volume Number	330
Language	English
Publisher	IOP Publishing
Publisher Date	2018-03-01
Access Restriction	Open
Subject Keyword	Journal: Iop Conference Series: Materials Science and Engineering Manufacturing Engineering Stress Corrosion Cracking
Content Type	Text
Resource Type	Article

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