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Assessment of the hydrogen induced stress cracking resistance of precipitation hardened nickel-based alloys using the slow strain rate tensile test method - Experimental parameters and related issues
Southwest Research Institute, US.
RISE - Research Institutes of Sweden, Materials and Production, KIMAB. (Institut de la Corrosion)
RISE - Research Institutes of Sweden, Materials and Production, KIMAB. (Institut de la Corrosion)
RISE - Research Institutes of Sweden, Materials and Production, KIMAB. (Institut de la Corrosion)
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2019 (English)In: NACE - International Corrosion Conference SeriesVolume 2019-March, 2019, Nashville; United States; 24 March 2019 through 28 March 2019;, National Assoc. of Corrosion Engineers International , 2019Conference paper, Published paper (Refereed)
Abstract [en]

Within the framework of a Joint Industrial Project (JIP) sponsored by several petroleum companies, the behavior of several Precipitation Hardened (PH) Ni-based alloys with respect to Hydrogen Induced Stress Cracking (HISC) resistance was studied using the Slow Strain Rate Tensile (SSRT) test method under hydrogen charging conditions. The experimental conditions included a 0.5M sulfuric acid solution at 5 mA/cm2 and at 40°C at a strain rate of 10-6 sec-1. A round robin was performed that highlighted the need to measure the effective strain rate of the specimen during the elastic part of the SSRT test, the cell configuration, the current density, the gas cap composition, were all studied to determine the effects on the results. Once the test conditions had been optimized, the study of different industrial heats was carried out on specimens sampled in three locations, 120 degrees apart and at mid radius. It was found that sampling different areas could lead to changes in the test results, resulting mainly from microstructural variances at different locations of the bar. The results generated in this program could then be studied by relating plastic elongation obtained under CP as well as cracking mode and microstructure compliance with the API 6A CRA standard.

Place, publisher, year, edition, pages
National Assoc. of Corrosion Engineers International , 2019.
Keywords [en]
HISC, Precipitation Hardened Ni-based alloys, SSRT, Density of gases, Hardening, Hydrogen, Metal testing, Nickel alloys, Petroleum industry, Precipitation (chemical), Regulatory compliance, Tensile testing, Cell configurations, Experimental conditions, Experimental parameters, Ni based alloy, Slow strain rate tensile test, Sulfuric acid solution, Strain rate
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-40476Scopus ID: 2-s2.0-85070068401OAI: oai:DiVA.org:ri-40476DiVA, id: diva2:1359983
Conference
NACE - International Corrosion Conference Series 24 March 2019 through 28 March 2019
Available from: 2019-10-10 Created: 2019-10-10 Last updated: 2019-10-10Bibliographically approved

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