Journal ArticleDOI
Effect of ferrite transformation on the tensile and stress corrosion properties of type 316 L stainless steel weld metal thermally aged at 873 K
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In this article, the effect of microstructural changes, due to transformation of delta ferrite, on the associated variations that take place in the tensile and stress corrosion properties of type 316 L stainless steel weld deposits when subjected to postweld heat treatment at 873 K for prolonged periods (up to 2000 hours).Abstract:
This article deals with the effect of the microstructural changes, due to transformation of delta ferrite, on the associated variations that take place in the tensile and stress corrosion properties of type 316 L stainless steel weld deposits when subjected to postweld heat treatment at 873 K for prolonged periods (up to 2000 hours). On aging for short durations (up to 20 hours), carbide/ carbonitride was the dominant transformation product, whereas sigma phase was dominant at longer aging times. The changes in the tensile and stress corrosion behavior of the aged weld metal have been attributed to the two competitive processes of matrix softening and hardening. Yield strength (YS) was found to depend predominantly on matrix softening only, while sig-nificant changes in the ultimate tensile strength (UTS) and the work-hardening exponent, n, occurred due to matrix hardening. Ductility and stress corrosion properties were considerably affected by both factors. Fractographic observations on the weld metal tested for stress-corrosion cracking (SCC) indicated a combination of transgranular cracking of the austenite and interface cracking.read more
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The effects of cold rolling and sensitisation on hydrogen embrittlement of AISI 304L welds
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Journal ArticleDOI
Stress corrosion cracking of austenitic weld deposits in a salt spray environment
TL;DR: In this paper, E.ER 308L and 309LMo were utilized as filler metals for the groove and overlay welds of a 304L stainless steel substrate, which was prepared via a gas tungsten arc-welding process in multiple passes.
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A comparison of hydrogen embrittlement susceptibility of two austenitic stainless steel welds
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Journal ArticleDOI
Prediction of sigma-phase embrittlement and its influence on repair weldability for type 316FR stainless steel weld metals with different solidification modes
Eun Joon Chun,Kazuyoshi Saida +1 more
TL;DR: In this article, the influence of long-term σ phase embrittlement on repair weldability for type 316FR stainless steel weld metals (316FR-AF and 316FR-FA) was investigated.
Journal ArticleDOI
Effect of thermal aging on metallurgical, tensile and impact toughness performance of electron beam welded AISI 316 SS joints
TL;DR: In this paper, the effects of carbide precipitation on the metallurgical and mechanical properties of the weld were evaluated after aging at 750 °C for 300 h, and optical microstructure analysis showed that the weld zone consists of skeletal, vermicular, lathy, and lacy ferrite which further transformed into carbides after thermal aging.
References
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Stress-corrosion cracking of sensitized type 304 stainless steel in thiosulfate solutions
TL;DR: In this article, the authors studied the stress corrosion cracking of a sensitized Type 304 stainless steel at room temperature using controlled potentials and two concentrations of sodium thiosulfate.
Journal ArticleDOI
Influence of nitrogen addition on microstructure and pitting corrosion resistance of austenitic weld metals.
Journal ArticleDOI
The Effect of Autogenous Welding on Chloride Pitting Corrosion in Austenitic Stainless Steels
TL;DR: In this paper, Potentiostatic and isothermal immersion tests have been used to investigate pitting corrosion in the weld metal of low carbon (<0.03%C) austenitic stainless steels.
Journal ArticleDOI
On microstructure-property correlation of thermally aged type 316L stainless steel weld metal
TL;DR: In this paper, the microstructure changes and consequent deterioration in the room temperature tensile properties of type 316L stainless steel weld metal when exposed to elevated temperatures (773 to 973 K) for prolonged periods (up to 5000 hours).
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