Results 11 to 20 of about 904,230 (261)
On the chiral phase transition in the linear sigma model [PDF]
The European Physical Journal A, 2004 12 pages, 4 ...
Phat, Tran Huu +2 more
openaire +2 more sources
Metals, 2018 Co-Re-Cr alloys are being developed for high-temperature application in gas turbines. In these alloys, the Cr2Re3-based σ phase is stable when the Cr content is higher than 20 atomic %. The addition of Ni is being studied to partially substitute Cr,
Kai Dörries +5 more
doaj +1 more source
Journal of Materials Research and Technology, 2022 The CoCrxCuFeMnNiV (x = 0, 0.25, 0.5, 0.75, 1) high-entropy alloy was prepared via vacuum arc smelting, and the effect of different Cr contents on the microstructure evolution and mechanical properties of it was evaluated.
Wen He +4 more
doaj +1 more source
Synthesis of the stationary-phase sigma factor sigma s is positively regulated by ppGpp [PDF]
Journal of Bacteriology, 1993 Strains of Escherichia coli which lack detectable guanosine 3',5'-bispyrophosphate (ppGpp) display a pleiotropic phenotype that in some respects resembles that of rpoS (katF) mutants. This led us to examine whether ppGpp is a positive regulator of sigma s synthesis.
D R, Gentry +4 more
openaire +2 more sources
Microstructural Transformation in a Root Pass of Superduplex Stainless Steel Multipass Welding [PDF]
Materials Research, 2017 The microstructure of the root pass in a superduplex stainless steel multipass welding was investigated.Results showed that the welding metal has an austenite matrix with particles of sigma phase formed in the ferrite/austenite interface and ...
Doris Ivette Villalobos-Vera +1 more
doaj +1 more source
The Xi-Phase and a New Sigma Phase [PDF]
Nature, 1951 Six phases with structures isomorphous with the iron – chromium sigma phase have been reported in binary alloys of the transition elements of the first long period1–3. In addition, Goldschmidt4 has shown that the phase FeMo, stable between 1,180° and 1,540° C., has the same structure.
openaire +1 more source
Metals, 2018 An in situ scanning electron microscope (SEM) study was conducted on a super duplex stainless steel (SDSS) containing 0%, 5% and 10% σ-phase. The material was heat treated at 850 °C for 12 min and 15 min, respectively, to achieve the different ...
Christian Oen Paulsen +4 more
doaj +1 more source
Evaluation of the low corrosion resistant phase formed during the sigma phase precipitation in duplex stainless steels [PDF]
Materials Research, 1999 The duplex stainless steels, having a volumetric fraction of 50% ferrite and 50% austenite, conciliate high corrosion resistance with good mechanical properties.
Darlene Yuko Kobayashi, Stephan Wolynec
doaj +1 more source
Magnetism and magnetic phase diagram of sigma-phase Fe68V32 compound [PDF]
Intermetallics, 2021 Abstract The magnetic phase diagram in the H-T coordinates has been determined for σ-Fe68V32 from the ZFC/FC magnetization measurements. The re-entrant character of magnetism, going from paramagnetic through ferromagnetic to spin-glass (SG) states, has been evidenced.
Piotr Konieczny, Stanisław M. Dubiel
openaire +1 more source
Kinetics of sigma phase formation in a Duplex Stainless Steel
Materials Research, 2009 This work determines the kinetics of sigma phase formation in UNS S31803 Duplex Stainless Steel (DSS), describing the phase transformations that occur in isothermal aging between 700 and 900 ºC for time periods up to 1032 hours, allowing the ...
Rodrigo Magnabosco
doaj +1 more source