In a two-part series of papers, the galvanic corrosion behavior of sensitized aluminum alloy (AA)5083-H131 (UNS A95083) when coupled with AISI 4340 (UNS G43400) steel was studied experimentally
3 Middle East Turbomachinery Symposium (METS III) 15 alloy forged steel AISI 4340 and has a length of 4,553.9 mm (14.94 ft.). The diffusers are vaneless while the return channels have vanes. The MR-HP 6 stage compressor, with a rated weight flow of 766.34 kg/hr, is a straight through centrifugal unit with vertically split barrel casing. The tapered shaft (1/2
Hydrogen embrittlement of AISI 4340 was studied using slow strain rate tests of both smooth and notched specimens. Two heat treatments of AISI 4340 were evaluated that produced yield strengths of 1479 MPa and 1140 MPa. The strain rate over the gauge section for the smooth tests and in the notch root for the notched tests was 1x10-6 /s.
Corrosion Failure of AISI4340 Steel in Oxygen-Containing AISI4340 steel was widely used as the material of super high pressure tubular reactor due to its high mechanical strength [ 1, 2 ], while 4340 was susceptible to stress corrosion cracking (SCC) or corrosion fatigue (CF) [ 3 5
Corrosion behaviour of magnetron sputtered a- and b-Ta 100 lm deposited on AISI 4340 steel using DC magnetron sputtering were investigated with potentiodynamic polarization and EIS. Morphological evaluation of the surface and cross-sections after corrosion tests was conducted using scanning electron microscopy (SEM). In addition, galvanic corrosion behaviour of Ta and steel substrate was studied by
to the different consequences caused by corrosion is the use of green corrosion inhibitors. In the present research project, the inhibition capacity of the eugenol, o-eugenol and diphenol, on AISI 1020 carbon steel exposed to a 1M HCl acid medium is evaluated. Hence, the corrosion rate of the material in solutions with and
Evidencing the crude oil corrosion by Raman spectroscopy Jan 01, 2015 · The corrosion process was monitored as a function of time during a period of 36 days, and the products and the morphology changes on the steel were evaluated using Raman spectroscopy and AFM. Initially, two crude oils were submitted to primary characterization (emulsified water and sediment, BSW, API degree, pour point, salt, TAN, total sulfur, kinematic viscosity, and density) and
Microstructure and Corrosion Behavior of ZnO-Mg Coating Sep 14, 2020 · This paper aims to investigate the corrosion behavior of ZnO-Mg coatings on AISI 4140 steel using spray coating technology. Three different coating thicknesses of approximately 30, 60 and 90 µm are considered in this study. The structural and morphological properties of the coated samples are characterized using optical microscope, scanning electron microscope (SEM), x-ray diffraction
Premature failures of steel (AISI 4340) breech chambers in which the solid propellant cartridges are burned is a serious concern. Analysis of a number of breech chamber failures identified corrosion as one problem with an indication that stress corrosion cracking may also be occurring.
Surface Integrity Characterization of Hardened AISI 4340 In this context, the purpose of this study is the microstructural characterization of the surface of specimens of AISI 4340 hardened steel, submitted to grinding process with different formulations of biodegradable cutting fluid, including the use of pure vegetable oils, evaluating surface integrity of
UNCLASSIFIED AD 423391 1 - DTIC2 Stress corrosion specimen design 3 Typical stress corrosion fractures observed in specimens. A-18%Ni steel forging, B-9%Ni steel forglng, C-Hl1 tool steel billet, D-AISI 4340 steel rod stock 4 The rock-candy like facets of the 18% Ni steel stress corrosion fractures 5 In
select article Characterization of AISI 4340 corrosion products using Raman spectroscopy. Short communication Full text access Characterization of AISI 4340 corrosion products using Raman spectroscopy. E. Hazan, Y. Sadia, Y. Gelbstein. Pages 414-418 Download PDF. Article preview.