Results 1 to 10 of about 109,697 (226)
Influence of ageing treatment temperature and duration on σ-phase precipitation and mechanical properties of UNS S32750 SDSS alloy [PDF]
Journal of Advanced Research, 2021 Introduction: Super-Duplex Stainless Steeles (SDSS) proved an excellent potential for its use in many chemical and offshore applications due to their both high mechanical properties and a high corrosion resistance in chloride ion solutions.
Elisabeta Mirela Cojocaru +3 more
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Journal of Materials Research and Technology, 2023 Topologically close-packed phases (TCP phase), with ordered dense-stacked structure, realize the atomic diffusion at high temperatures by forming the defects. In this study, we investigated the σ → γ transformation process at high temperature in cast 7Mo
Runze Zhang +4 more
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Effect of sigma phase precipitation on microstructure and properties of cast ZG0Cr26Ni5Mo3Cu3 duplex stainless steel under different heat treatments [PDF]
China Foundry, 2018 ZG0Cr26Ni5Mo3Cu3 Duplex Stainless Steel (DSS) was solution treated at 1,060 ìC for 3 h,followed by water cooling. Tempering treatments were conducted at 720, 750 and 780 ìC, respectively, for 16 h, followed by air cooling.
Ze-hua Zhu +2 more
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Journal of Materials Research and Technology, 2023 The influence mechanisms of Ce addition on the precipitation behaviour of σ phase and nitrides were systematically investigated. The results demonstrated that the addition of Ce significantly promoted the nucleation and slightly inhibited the growth of ...
Jiangtao Yu +7 more
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Interdiffusion behavior in sigma-phase using Ni3Al/Mo diffusion couples [PDF]
Journal of Mining and Metallurgy. Section B: Metallurgy, 2011 The sigmaNiMo( Al) phase was formed using Ni3Al/Mo diffusion couples at 1423, 1473 and 1523 K. The growth of formed phase and the concentration-distance profiles for each component in the diffusion couples were examined by electron probe microanalysis
Zhou C., Gong W., Huang S., Wei H.
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Precipitation behavior of σ phase in 23Cr-14Ni high-nitrogen austenitic stainless steel
Cailiao gongcheng, 2022 Precipitation behavior of σ phase in 23Cr-14Ni high-nitrogen austenitic stainless steel was investigated by empirical formulas, thermodynamic calculations, Gleeble thermo-mechanical simulation, optical microscope, scanning electron microscopy and ...
ZHANG Yuxiang +4 more
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Effect of Ferrite on the Precipitation of σ Phase in Cast Austenitic Stainless Steel Used for Primary Coolant Pipes of Nuclear Power Plants [PDF]
Materials Research, 2017 The effect of ferrite phase on the precipitation of σ phase in a Z3CN20.09M cast austenitic stainless steel (CASS) used for primary coolant pipes of pressurized water reactor (PWR) nuclear power plants was investigated by using isothermal heat-treatment,
Yongqiang Wang, Na Li
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Journal of Materials Research and Technology, 2023 The effect of cold rolling reduction on the precipitation of σ phase at 800 °C in the 2906 DSS was investigated. The results show that the precipitation rate of the σ phase is improved with the increase of rolling reduction, and the maximum volume ...
Jing-kun Li +6 more
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The P1 promoter of theEscherichia coli rpoHgene is utilized by Ï70-RNAP or ÏS-RNAP depending on growth phase [PDF]
FEMS Microbiology Letters, 2009 The P1 promoter of the Escherichia coli rpoH gene has been known as a sigma(70)-dependent promoter (RNAP). We show here that it is also recognized by sigma(S). The sigma(70) and sigma(S) RNA polymerase subunits direct transcription from the P1 promoter in the exponential and stationary growth phases, respectively, and transcriptional start sites for ...
Anna, Janaszak +3 more
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Ïsregulates pLS 1 maintenance in stationary-phaseEscherichia coli [PDF]
FEMS Microbiology Letters, 1996 We have studied the influence of sigma s on the stability and number of copies of the promiscuous plasmid pLS1 in Escherichia coli. Our results indicate that pLS1 is less stable and has a lower number of copies in a rpoS mutant than in a wild-type strain during stationary phase. This behaviour does not seem to be due to differences in the expression of
M, Espinosa-Urgel, C, Chamizo, A, Tormo
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