Effect of ageing on precipitation and impact energy of 2101 economical duplex stainless steel

Zhang, Wei; Jiang, Laizhu; Hu, Jincheng; Song, Hongwei

doi:10.1016/j.matchar.2008.07.002

Cited by 87 publications

(26 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[19] The observations of the presented study agree with the results of Gill et al, [32] that the formation of the r phase is composed of two stages, i.e., carbide formation, which involves the grain-boundary diffusion of Cr, and r-phase precipitation, which involves the lattice diffusion of Mo. [20] It is worth mentioning that there is no clear agreement among researchers as to whether M 23 C 6 acts as a precursor to the r phase or the formation of the r phase precedes that of the M 23 C 6. [17] EDS analyses showed that the carbides are mainly composed of Cr and Fe.…”

Section: Precipitation Of the Sigma Phase At Various Times And Tempersupporting

confidence: 91%

“…For comparison, Maehara and Ohmori [25] obtained 2 pct of the r phase after 6 minutes of aging at 1123 K (850°C) for a 24.9Cr6.4Ni2.8Mo0.1C DSS. Wei et al [20] observed a rapid decrease in the impact energy after 10 minutes of aging at 973 K (700°C) for 2101 DSS, whereas Huang and Shih [17] obtained 15 pct of r phase after 60 minutes of aging at 1223 K (950°C) for 22.6Cr5.5Ni3.2-Mo0.14N DSS. A comparison with the literature shows that 30CrNi10 DSS, which was selected in the current investigation, can be considered as one of the most sensitive materials when it comes to the precipitation rate of the r phase.…”

Section: Precipitation Of the Sigma Phase At Various Times And Tempermentioning

confidence: 99%

“…[8,15,16] In addition, many publications deal with the precipitation at different aging times, especially in the range of a few minutes. [14,[17][18][19][20][21][22][23][24][25][26] In these studies, the materials were predominately in a wrought initial state and the precipitation was usually studied below 1453 K (1180°C). However, studies that discussed the precipitation and transformation kinetics across the entire temperature range that is relevant for hot working are rare, and no publication was found that dealt with a ferrous alloy that simultaneously contains large amounts of Cr (~30 wt pct), Ni (~10 wt pct), and C (over 0.1 wt pct), which can additionally influence the precipitation and transformation processes because the microstructure is characterized by alterations that result in reduced properties, such as ductility, toughness, corrosion resistance, etc.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Transformation and Precipitation Kinetics in 30Cr10Ni Duplex Stainless Steel

Fazarinc

Terčelj

Bombač

et al. 2010

Metall Mater Trans A

View full text Add to dashboard Cite

To improve the microstructure during casting, hot forming, and heat treatment of 30Cr10Ni duplex stainless steel, accurate data on the precipitation and transformation processes at high temperatures are needed. In this article, the precipitation and transformation processes at various aging times in the temperature range 873 K to 1573 K (600°C to 1300°C) were studied. The 30Cr10Ni ferrous alloy contains a relatively large amount of Cr, Ni, and C, which results in a complex microstructure. In addition to the ferrite, austenite, and sigma phase, the M 23 C 6 and MC carbides were also observed in the microstructure. The precipitation of the sigma phase was observed after just 3 minutes of aging, and after 30 minutes of aging at approximately 1053 K (780°C), its fraction exceeded 40 pct. An intensive austenite-to-ferrite transformation was observed above 1423 K (1150°C). Optical microscopy, energy-dispersive X-ray spectroscopy (EDS), electron backscattered diffraction (EBSD), and X-ray diffraction (XRD), as well as micro-indentation hardness, hardness, impact toughness, and tensile tests, were carried out to evaluate the obtained microstructures of aged samples.

show abstract

Section: Precipitation Of the Sigma Phase At Various Times And Tempersupporting

confidence: 91%

Section: Precipitation Of the Sigma Phase At Various Times And Tempermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Transformation and Precipitation Kinetics in 30Cr10Ni Duplex Stainless Steel

Fazarinc

Terčelj

Bombač

et al. 2010

Metall Mater Trans A

View full text Add to dashboard Cite

show abstract

“…It has been reported that annealing below 1,000°C will lead to the precipitation of sigma phase, 8 and fast cooling from temperatures higher than 1,200°C causes the formation of chromium nitride in DSS. [9][10][11] These secondary precipitates reduce the toughness and corrosion resistance of the DSS.…”

Section: Corrosion-february 2013mentioning

confidence: 99%

Effect of Annealing Temperature on the Pitting Corrosion Behavior of UNS S82441 Duplex Stainless Steel

Yang¹,

Tan²,

Zhang³

et al. 2013

CORROSION

View full text Add to dashboard Cite

The pitting corrosion behavior of UNS S82441 duplex stainless steel annealed at six different temperatures ranging from 1,000°C to 1,130°C for 1 h has been investigated by means of the potentiostatic critical pitting temperature. The microstructure evolution and pit morphologies of the specimens were studied using optical/scanning electron microscopy. The results demonstrated that the volume fraction of the austenite phase decreased with the increasing annealing temperature. Lower critical pitting temperature values were obtained after annealing at higher temperatures. Pitting was initiated preferentially inside the ferrite domains, indicating that the ferrite phase had inferior pitting corrosion resistance as compared to the austenite phase. The pitting resistance equivalent number of the ferrite phase fell with the annealing temperature, while the values for the austenite phase rose. No equal pitting resistance equivalent number of the ferrite and austenite phases was found for this steel in the range of annealing temperatures.

show abstract

“…It seems that the impact toughness is the mechanical property that is most sensitive to the presence of secondary phases, and it has been found that intermetallic phases in any amount will cause a sharp drop in impact toughness (see e.g. [18][19][20][21][22][23][24][25]). Typically, an amount of approximately 0.5 vol.% sigma phase has been reported sufficient to cause a drop in impact toughness of 50%, while 1-2 vol.% sigma phase seems necessary to produce a predominantly brittle fracture.…”

Section: Introductionmentioning

confidence: 99%