Journal ArticleDOI
Effect of microstructure on stress corrosion cracking behaviour of austenitic stainless steel weld metals
K.N. Krishnan,K. Prasad Rao +1 more
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In this paper, stress corrosion cracking (SCC) tests were conducted on notched tensile samples in a 5N H2SO4 + 0.5N NaCl solution at room temperature.Abstract:
Austenitic stainless steel welds with different ferrite contents were produced using the submerged arc welding (SAW) strip-cladding process. The clads were removed and remelted using the gas tungsten arc welding (GTAW) process. They were post-weld heat treated at 600, 800 and 1000 °C for 1, 10 and 100 h. Stress corrosion cracking (SCC) tests were conducted on notched tensile samples in a 5N H2SO4 + 0.5N NaCl solution at room temperature. The results showed that when the ferrite network was discontinuous or globularized due to heat treatment, the SCC resistance was better than when the network was continuous. Welds deposited by the low heat input (GTAW) process showed better SCC resistance than their SAW counterparts because they had a finer ferrite network. The overall cracking was due to SCC in austenite and anodic dissolution of ferrite.read more
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Journal ArticleDOI
Pitting and stress corrosion cracking behavior in welded austenitic stainless steel
TL;DR: In this article, the effect of microstructural changes in 304 austenitic stainless steel induced by the processes of gas tungsten arc welding (GTAW) and laser-beam welding (LBW) on the pitting and stress corrosion cracking (SCC) behaviors was investigated.
Journal ArticleDOI
Role of δ-ferrite in stress corrosion cracking retardation near fusion boundary of 316NG welds
Hiroshi Abe,Yutaka Watanabe +1 more
TL;DR: In this article, the authors investigated stress corrosion cracking near the fusion boundary of a 316NG stainless steel (SS) welded joint in high-temperature water with emphasis on the relation to the microstructural characteristics.
Journal ArticleDOI
Effect of weld metal chemistry on stress corrosion cracking behavior of AISI 444 ferritic stainless steel weldments in boiling chloride solution
Pedro Duarte Antunes,Edmilson Otoni Correa,Reginaldo Pinto Barbosa,Eduardo Miguel da Silva,Angelo Fernando Padilha,P. M. Guimaraes +5 more
TL;DR: In this article, the influence of weld metal chemistry on the susceptibility of AISI 444 ferritic stainless steel (FSS) weldment to stress corrosion cracking (SCC) in hot chloride was investigated by constant load tests and metallographic examination.
ReportDOI
Effects of Friction Stir Processing on the Microstructure and Mechanical Properties of Fusion Welded 304L Stainless Steel
TL;DR: In this article, a preliminary processing window for FSP of 304L stainless steel, the resulting microstructure associated with this process window, along with considerations given to mechanical properties and corrosion.
Journal ArticleDOI
Effect of Ultrasonic Nano-Crystal Surface Modification (UNSM) on the Passivation Behavior of Aged 316L Stainless Steel
TL;DR: This work focused on the effect of aging time and ultrasonic nano-crystal surface modification on the passivation behavior of 316L stainless steel, and the UNSM-treatment reduced the carbon segregation, regardless of whether the stainless steel 316L was slightly or heavily sensitized.
References
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Journal ArticleDOI
Slow Strain Rate Stress Corrosion Cracking of Type 304 Stainless Steels
F. Stalder,D. J. Duquette +1 more
TL;DR: In this article, slow strain rate experiments have been performed on Type 304L and 304 stainless steel sheet material in boiling MgCl2 as a function of solution temperature and strain rate.
Journal ArticleDOI
Stress Corrosion Cracking Behavior of Duplex Stainless Steel Weldments in Boiling MgCl2
TL;DR: In this paper, stress corrosion cracking (SCC) experiments were conducted in 42% boiling MgCl2 on two Type 304L stainless steels which exhibited a duplex ferrite-austenite structure in the weld fusion zone and showed that when weldments are transverse to the principal stress axis, carbon and nitrogen contents of the alloy can be important in determining SCC susceptibility.
Stress corrosion behavior of stainless steel welds in high temperature water containing chlorides
TL;DR: In this article, the effects of delta ferrite, carbon content and postweld heat treatment on the stress corrosion susceptibility of AISI Types 308, 309, and 316 stainless steel surfacing welds in high temperature water have been investigated.
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