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1-20 of 469
Keywords: microstructure
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Proceedings Papers
Dannisa R. Chalfoun, Ricardo M. Carranza, Luis A. Aguirre, Teresa E. Perez, Mariano Iannuzzi, Mariano A. Kappes
Publisher: NACE International
Paper presented at the CORROSION 2021, April 19–30, 2021
Paper Number: NACE-2021-16549
... with different nickel content was specially fabricated to study the effect of that element on the sulfide stress cracking (SSC) resistance. Quenching and tempering (Q&T) heat treatments were customized to each chemical composition to obtain a tempered martensite microstructure with a hardness level below...
Proceedings Papers
Publisher: NACE International
Paper presented at the CORROSION 2021, April 19–30, 2021
Paper Number: NACE-2021-16447
... UNS J92500 and J92600 compositions. Testing included microstructural evaluation of polished surfaces after the electrochemical tests and DoS measurements. The modified DLEPR consistently measured higher DoS values, but the trends in the data were the same for both versions of the test. Microscopy...
Proceedings Papers
Publisher: NACE International
Paper presented at the CORROSION 2021, April 19–30, 2021
Paper Number: NACE-2021-16733
... to the formation of corrosion pits were investigated. Four different sucker rod materials were evaluated with respect to (1) chemistry, (2) non- metallic inclusion content and (3) microstructural investigation including banding severity. It was concluded that microstructural banding has a negative influence...
Proceedings Papers
Publisher: NACE International
Paper presented at the CORROSION 2021, April 19–30, 2021
Paper Number: NACE-2021-16887
... ABSTRACT Microstructure and strength affect hydrogen embrittlement (HE) susceptibility of martensitic steels. In order to understand their respective roles, two martensitic steels with the same chemical composition, but different strength (and or hardness) levels were selected. Incremental step load (ISL...
Proceedings Papers
Publisher: NACE International
Paper presented at the CORROSION 2021, April 19–30, 2021
Paper Number: NACE-2021-16696
... to crack propagation (K ISSC ). The results are discussed in terms of microstructure, hydrogen pick-up and precipitation state. Introduction The use of Oil Country Tubular Goods (OCTG) material in harsher environments (deeper wells, higher H2S concentrations and/or higher pressure and temperature...
Proceedings Papers
Publisher: NACE International
Paper presented at the CORROSION 2021, April 19–30, 2021
Paper Number: NACE-2021-16555
... that simulates typical exposure during the hot-clad bonding fabrication process. The microstructures of the new alloy in the solution-annealed, sensitization-heat-treated, and welded conditions will also be shown and discussed. The test results and microstructures will be compared to those of other alloys...
Proceedings Papers
Publisher: NACE International
Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13418
... in informed selection of UNS N10276 microstructures for specific applications. Here, grain boundary corrosion susceptibility in the context of grain boundary types is the focus. With the aid of electron backscatter diffraction microscopy (EBSD), grain maps containing spatial orientation information have been...
Proceedings Papers
Publisher: NACE International
Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13558
...-fabricated N07247 and modified N07247 were cyclic oxidation tested at 950°C in air and humid air for durations ranging from 100 h to 5000 h. Increased spallation rates were observed initially for the AM N06002 alloys in comparison with wrought N06002 alloy because of the AM alloy specific microstructures...
Proceedings Papers
Publisher: NACE International
Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13404
... to residual stress and microstructure. There is a great concern to understand the influence of each region of the weld joint on hydrogen induced crack initiation and propagation. Formation of iron sulphide film on the steel surface plays an important role on this process. This study investigates the behavior...
Proceedings Papers
Publisher: NACE International
Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12783
... Production Chemistry Corrosion Management Publication Division texas 77084 metals & mining Downstream Oil & Gas variation carbon content Houston test result manuscript oilfield chemistry H2S management hour 550 permission Microstructure polythionic acid stress corrosion...
Proceedings Papers
Publisher: NACE International
Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12900
... Division Microstructure hardness manuscript Houston SSC resistance Sulfide Stress Cracking Resistance of High Strength, Low Alloy Steels with varying Nickel content Karthik Krishnan Halliburton 2601 E Beltline Road, Carrollton, TX, 75006 ABSTRACT Low alloy steels are one of the most commonly used...
Proceedings Papers
Publisher: NACE International
Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12846
... was Hydrogen Assisted Cracking (HAC) as a result of embrittlement from atomic hydrogen absorbed by the alloy in specific operating environments. PH nickel alloys exhibit complex microstructures with multiple potential secondary and tertiary phases. They require carefully controlled thermomechanical processing...
Proceedings Papers
Sudhakar Mahajanam, Fred Addington, Joanna Folse, Gillian Sayegh, Cesar Espinoza, Yenny Cubides, Scott Sprinkle, Joseph Kornegay, Joe Vining
Publisher: NACE International
Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12886
... that these materials were heavily sensitized with embrittling phases present at the austenite grain boundaries. Improper annealing processes at the manufacturing plant likely caused the sensitization of the microstructure. Downstream of the reformers, UNS S30403 austenitic SS tube ends of the boiler feed water heat...
Proceedings Papers
Publisher: NACE International
Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12849
... Nickel alloys are needed for these high pressure high temperature (HPHT) applications, there have been known field failures with PH Ni alloys, such as UNS N07718 1-4 . Many of these field failures have been linked to specific microstructural features. In particular, the presence of sufficient amounts...
Proceedings Papers
Publisher: NACE International
Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12972
.... The SOHIC performance is discussed based on grade, microstructure and hardness of the investigated pipe materials. The investigated SAWL large-diameter pipes revealed excellent SOHIC resistance. Key words: SOHIC, SAWL Pipe, FEM 1 Paper No. 12972 ©2019 by NACE International. Requests for permission...
Proceedings Papers
Maria Sofia Hazarabedian, Andreas Viereckl, Zakaria Quadir, Garry Leadbeater, Vladimir Golovanevskiy, Mariano Iannuzzi, Paul Georgeson, Skjalg Erdal
Publisher: NACE International
Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12963
... ferrule manuscript hydrogen Publication Division permission elongation Microstructure Hydrogen Induced Stress Cracking of Super Duplex Stainless Steel UNS S32760 A Root Cause Failure Investigation Maria Sofia Hazarabedian, Andreas Viereckl, Zakaria Quadir, Garry Leadbeater, Vladimir...
Proceedings Papers
Publisher: NACE International
Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12946
...% in gas (45 psi) CO2 3 mol% in gas (115 psi) Water Only condensed water Elemental Sulfur None EXPERIMENTAL PROCEDURE Materials Detailed investigation for field-experienced UNS N08535 was carried out covering mechanical properties, microstructure, induced corrosion damage and passive surface film. All...
Proceedings Papers
Publisher: NACE International
Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12994
... chemistry H2S management stir zone texas 77084 duplex stainless steel Microstructure Publication Division permission base metal stainless steel manuscript Hydrogen embrittlement under cathodic protection of friction stir welded UNS S32760 super duplex stainless steel Carlos Eduardo Fortis...
Proceedings Papers
Publisher: NACE International
Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13071
.../AgCl (0.1 M KCl). Frequency scans were conducted to assess growth rate sensitivity of various weld microstructures to cyclic frequency, and the fatigue response at the low end of the frequency range was explored in greater detail. Key words: wellhead, structural casing, X80, 8630, corrosion fatigue...
Proceedings Papers
Publisher: NACE International
Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13012
..., including quantitative optical microscopy (e.g. crevice depth and area) and electron microscopy, correlations were established between alloy composition, microstructure, and the various forms of corrosion investigated in this study. This study demonstrates today’s Cr-Mn-N austenitic stainless steels...
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