A study on the susceptibility of high strength tempered martensite steels to hydrogen embrittlement (HE) based on incremental step load (ISL) testing methodology
| Autor: | Xiang Wang, Tuhin Das, Stephen Yue, S. Brahimi, Sriraman K. Rajagopalan |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Hydrogen Cementite Mechanical Engineering Metallurgy chemistry.chemical_element 02 engineering and technology Manganese Intergranular corrosion 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Cathodic protection chemistry.chemical_compound chemistry Mechanics of Materials Martensite 0103 physical sciences General Materials Science 0210 nano-technology Embrittlement Hydrogen embrittlement |
| Zdroj: | Materials Science and Engineering: A. 716:189-207 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2018.01.032 |
| Popis: | Incremental step load (ISL) technique was used to determine the material susceptibility of three different grades of tempered martensite steels 35CrMo4, 41Cr4 and 36NiCrMo4 to hydrogen embrittlement (HE). In addition to testing the steel grades in air, the environmental hydrogen embrittlement susceptibilities (EHE) of each material were determined by in-situ charging of hydrogen at three different cathodic potentials −0.85 VSCE, −1VSCE and −1.2VSCE to obtain the entire threshold curves for these materials. Overall investigation implies that 35CrMo4 is more susceptible than 41Cr4 and 36NiCrMo4. The fracture surface morphology in case of 35CrMo4 is entirely intergranular at −1VSCE and −1.2VSCE showing the severity of embrittlement. The higher matrix-cementite interfaces along with high cementite and low manganese sulphide (MnS) inclusion content of 36NiCrMo4 influencing the hydrogen transport kinetics within the material are responsible for the lower material susceptibility. The thermal desorption analyses (TDA) further corroborate the observations. |
| Databáze: | OpenAIRE |
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