Phase transformation and mechanical behavior in annealed 2205 duplex stainless steel welds
TL;DR: The phase transformations and mechanical behaviour during welding and subsequent annealing treatment of 2205 duplex stainless steel have been investigated in this article, where detailed microstructural examination showed the presence of higher ferrite amounts in the heat affected zone (HAZ), while higher amounts of austenite were recorded in the center region of the weld metal.
About: This article is published in Materials Characterization.The article was published on 2008-04-01. It has received 209 citations till now. The article focuses on the topics: Beta ferrite & Annealing (metallurgy).
Citations
More filters
TL;DR: In this article, the effect of welding processes and conditions on microstructure, mechanical properties and corrosion resistance of duplex stainless steels and its various combinations on the basis of structure-property co-relationship are systematically highlighted.
219 citations
TL;DR: In this article, a joint of dissimilar metals between 2205 duplex stainless steel and 16MnR low alloy high strength steel is welded by tungsten inert gas arc welding (GTAW) and shielded metal arc welding(SMAW) respectively.
145 citations
TL;DR: In this paper, the effect of tungsten inert gas welding and subsequent post-weld heat treatment on the microstructure evolution and pitting corrosion behavior of duplex stainless steel UNS S31803 was investigated.
125 citations
TL;DR: In this paper, a design of experiment (DOE) technique, the Taguchi method, has been used to optimize the pulsed current gas tungsten arc welding (PCGTAW) parameters for the corrosion resistance of super duplex stainless steel (UNS S32760) welds.
113 citations
TL;DR: In this article, the influence of microstructure and elemental partitioning on pitting corrosion resistance of duplex stainless steel joints welded by gas tungsten arc welding (GTAW) and flux-cored arc welding with different shielding gas compositions were studied by optical microscopy, electron backscatter diffraction, scanning electron microscopy (SEM) and electron probe microanalysis.
106 citations
References
More filters
15 Dec 2002-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, a series of aging treatments at the temperature range of 650-975°C for different time intervals in a solution-treated 2205 duplex stainless steel were carried out.
Abstract: A series of aging treatments at the temperature range of 650–975 °C for different time intervals in a solution-treated 2205 duplex stainless steel were carried out. The corresponding microstructure of aged specimens was observed and the impact toughness was measured. More attention was paid to the secondary phase precipitation and the transition of ductile-to-brittle fracture. The results indicated that the impact toughness of duplex stainless steel was sensitive to the precipitation of σ phase even at the initial stage of aging. Two kinds of Cr-, Mo-enriched intermetallic phases, σ and χ , were found to precipitate preferentially at δ / γ interface boundary and within δ -ferrite grain after 5 min of aging at the temperature range of 875–900 °C. The volume fraction of σ phase was continuously increased with the time of aging and σ phase developed into a coarse particle due to the high diffusibility of solute atoms at high temperatures. The precipitation of Mo-enriched χ phase at the initial stage of aging is presumably enhanced due to the low interfacial energy of highly coherent χ / δ interface with a characteristic cubic-to-cubic orientation relationship. However, this pre-formed χ phase was re-dissolved eventually into the σ phase when the specimen aged above 750 °C. Accompanied with the growth of secondary phases, the γ phase nearby the interface of σ or χ phase was induced to grow into the δ -ferrite region which was depleted in Cr and Mo. The δ -ferrite in original duplex structure would be completely decomposed into the σ phase and secondary γ after long-term aging.
321 citations
TL;DR: The relation between the migration of the δ/γ interface boundary and the growth of austenite as a function of aging treatment in SAF 2205 duplex stainless steel was investigated in this paper.
153 citations
TL;DR: In this article, the effect of the Kurdjumov-Sachs orientation relationship on sigma phase formation in a duplex stainless steel weld metal with different chemical compositions was examined.
126 citations
15 Dec 2002-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the microstructural evolution in a nitrogen-bearing 2205 duplex stainless steels during welding, a simulated weld thermal cycle with 5 kJ cm−1 heat input followed by exposure at 700 °C for different time intervals was performed.
Abstract: In order to investigate the microstructural evolution in a nitrogen-bearing 2205 duplex stainless steels (DSS) during welding, a simulated weld thermal cycle with 5 kJ cm−1 heat input followed by exposure at 700 °C for different time intervals was performed. The microstructure of high-temperature heat affected zone (HTHAZ) developed with the thermal experience was characterized via optical metallography and transmission electron microscopy (TEM). The duplex structure with equivalent phase components was drastically destroyed by the rapid thermal cycle. In the simulated HTHAZ structure, three different morphologies of newly formed austenite were observed in the coarse-grained δ-ferrite matrix; i.e. allotriomorphic austenite, Widmanstaten autenite and intragranularly nucleated autenite. During the exposure at 700 °C, the intragranularly nucleated austenite got coarse and the Widmanstaten austenite grew progressively. TEM revealed that several variants of rod-like Cr2N were precipitated selectively at intragranular and intergranular sites. From the analyses of diffraction patterns of TEM, Kurdjumov–Sachs orientation relationship was found to describe the interface between intragranularly nucleated autenite and δ-ferrite, while Pitch–Schrader orientation relationship to describe the disposition between hexagonal Cr2N precipitates and δ-ferrite matrix.
106 citations
15 Jan 2001-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the effects of nitrogen content and solution treatment temperature on the microstructure and tensile properties of 25Cr−7Ni−1.5Mo−3W−xN Duplex stainless steel (DSS) castings were investigated.
Abstract: The effects of nitrogen content and solution treatment temperature on the microstructure and tensile properties of 25Cr–7Ni–1.5Mo–3W–xN Duplex stainless steel (DSS) castings were investigated. An increase of nitrogen decreases the ferrite volume fraction and also can cause gas defects and change the solidification mode from ferrite single phase to ferrite–austenite mode. An increase of heat treating temperature increases the ferrite volume fraction, which decreases the tensile strength and the elongation but increases the yield strength almost linearly.
83 citations