Results 211 to 220 of about 915,450 (237)
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Microstructural characterization of inconel alloy 690
Proceedings, annual meeting, Electron Microscopy Society of America, 1988Inconel 690 is a nickel-base superalloy which, because of its superior corrosion resistance, is being considered as a substitute for Inconel 600. The composition of Alloy 690 is nominally 30wt.%Cr-10wt.%Fe-0.3wt.%Ti-bal Ni. This alloy is generally used in the thermally treated condition: solution anneal in the range 1030-1120*C for ∼0.07-lh followed by
M. G. Burke, B. Z. Hyatt
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1994
We describe an heterodyne mixer designed to be used at frequencies around 690 GHz. The active component is an SIS junction based on a lead-bismuth superconducting alloy. The receiver’s best result to date is a system double sideband noise temperature of 850 K at 692 GHz.
C. T. Cunningham +2 more
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We describe an heterodyne mixer designed to be used at frequencies around 690 GHz. The active component is an SIS junction based on a lead-bismuth superconducting alloy. The receiver’s best result to date is a system double sideband noise temperature of 850 K at 692 GHz.
C. T. Cunningham +2 more
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Elevated temperature hardening of INCONEL 690
Mechanics of Materials, 1998Abstract The strain hardening response of INCONEL 690 during tensile deformation between 200–1200°C has been examined. At low temperatures, ⩽600°C, two stages of hardening, associated with dislocation–dislocation and dislocation–solute interactions were observed. Increasing temperatures to 700°C resulted in the introduction of a third hardening stage,
Vasisht Venkatesh, H.J. Rack
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X100 (Grade 690) Helical-Welded Linepipe
2008 7th International Pipeline Conference, Volume 3, 2008During the past ten years, linepipe development activities around the world have been focused on high strength steels for Arctic gas transmission. The incentive for this work has been the potential for greater transportation efficiency and lower construction costs associated with the use of higher strength steels.
Fathi Hamad +5 more
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Journal of Molecular Biology, 2001
An instant-evolution experiment was performed on the eight nucleotides comprising the loop region of the 690 hairpin in Escherichia coli 16 S ribosomal RNA. Positions 690 to 697 were randomly mutated and 101 unique functional mutants were isolated, sequenced and analyzed for function in vivo. Non-random nucleotide distributions were observed at each of
Svetlana V Morosyuk +2 more
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An instant-evolution experiment was performed on the eight nucleotides comprising the loop region of the 690 hairpin in Escherichia coli 16 S ribosomal RNA. Positions 690 to 697 were randomly mutated and 101 unique functional mutants were isolated, sequenced and analyzed for function in vivo. Non-random nucleotide distributions were observed at each of
Svetlana V Morosyuk +2 more
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SCC of Alloy 690 and Its Weld Metals
CORROSION 2012, 2011Abstract Extensive SCC growth rate testing of Alloy 690 base metal, HAZ and weld metal was performed in representative PWR primary water at 290 to 360 °C. Intergranular cracking was observed in all materials. Growth rates as high as 1.2 x 10-6 mm/s were observed in the S-L orientation with microstructural banded material after cold ...
Kawaljit Ahluwalia +2 more
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Effects of PbO on the repassivation kinetics of alloy 690
Corrosion Science, 2006Effects of PbO on the repassivation kinetics of alloy 690 were examined to elucidate the reason why the alloy, otherwise immune, is susceptible to stress corrosion cracking (SCC) in high temperature water contaminated with a small amount of Pb compounds.
Ahn, S +3 more
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Research on M23C6 precipitation of 690 alloy
2014Precipitation M23C6 of 690 alloy was studied in this paper. Firstly, M23C6 precipitation and evolution of chromium-depleted zone of 690 alloy during TT were studied. Evolution of chromium-depleted zone of 690 alloy was affected markedly by TT.The test results showed that the lowest chromium concentration in chromium-depleted zone raised dramatically ...
Song Zhigang +5 more
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