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Showing 1 to 8 of 8 for “"Sigma phase"”.
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Sigma phase in the ternary systems chromium-cobalt-copper and chromium-manganese-copper
… metallographic techniques and x-ray analysis the phases present in each alloy were determined and the two ternary isotherml sections constructed. It was found that copper had a very limited solid solubility in the sign phase of both systems. The sigma field in the Cr-Co-Cu 1000°C. ternary …
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Factors affecting the constitution and stability of iron-base austenitic alloys.
… by analysing the composition of the individual phases by a micro-probe technique. The transformation of the delta ferrite, during the isothermal heat treatments, to either austenite or (austenite + sigma phase) has been investigated. In the sigma phase regions the delta ferrite transforms first …
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Abrasive wear resistance of ruthenium aluminide intermetallic and ferritic steels containing a sigma intermetallic phase
… and ferritic steel containing an iron-chrome sigma intermetallic phase have been investigated in this study. A medium carbon wear resistant steel (MCV) was used in the study to facilitate comparison between wear resistances in the materials of interest. Specimens of ruthenium aluminide, MCV …
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The Cr₃O-type compound in the niobium-rhodium-silicon ternary system
… contains niobium plus an unidentified phase assumed to be Nb₅Si₃. The Nb-Rh sigma phase extends into the ternary system to at least 10 atomic percent silicon. All ternary alloys investigated contained three phases. These phases were one or more unidentified phases combined with either …
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Investigation into the transformation products of CD3MN cast duplex stainless steel
… The primary research evaluated the kinetics of sigma ([Sigma]) phase formation by developing the time-temperature-transformation diagram for CD3MN and comparing these results to wrought duplex stainless steel transformation diagrams. The results of the study showed that the nose of the …
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The Effects of Weld Thermal Cycles on Additively Manufactured 316L Stainless Steel
… on the interelayer temperatures and sigma phase determination should be conducted to confirm the hypotheses to explain the phenomena observed in this study.</p>
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Solidification behavior and texture of laser-wire directed energy deposition of 316L austenitic stainless steel
… 900°C resulted in an increase in hardness due to sigma phase formation. Variation in hardness between samples heat treated at the same conditions is attributed to differences in the volume fraction of sigma phase due to differences in the initial delta-ferrite volume fraction in the as-built …
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ΔΟΜΙΚΟΙ ΜΕΤΑΣΧΗΜΑΤΙΣΜΟΙ ΚΑΤΑ ΤΗΝ ΑΝΟΠΤΗΣΗ ΑΝΟΞΕΙΔΩΤΩΝ ΦΕΡΡΙΤΙΚΩΝ ΧΑΛΥΒΩΝ ΚΑΙ Η ΕΠΙΔΡΑΣΗ ΤΟΥΣ ΣΤΗ ΣΥΜΠΕΡΙΦΟΡΑ ΚΑΤΑ ΤΗ ΘΡΑΥΣΗ ΚΑΙ ΚΑΤΑ ΤΗΝ ΟΞΕΙΔΩΣΗ ΥΨΗΛΗΣ ΘΕΡΜΟΚΡΑΣΙΑΣ
THE STRUCTURAL TRANSFORMATIONS OF CAST FERRITIC STAINLESS STEELS WITH 28-30% CR, 0.3-0.35% C AND ZR, TI, NB, NI ADDITIONS DURING LONG PERIOD ANNEALING AT 660 C, WERE STUDIED, BY MEANS OF OPTICAL AND ELECTRON MICROSCOPY, X-RAY DIFFRACTIONAND FLUORESCENCE, IMAGE ANALYSIS AND MOSSBAUER SPECTROSCOPY. …