Strain rate and hydrogen effects on crack growth from a notch in a Fe-high-Mn steel containing 1.1 wt% solute carbon
| Autor: | Eiji Akiyama, Kaneaki Tsuzaki, Motomichi Koyama, Hina Najam, Burak Bal |
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| Přispěvatelé: | AGÜ, Mühendislik Fakültesi, Makine Mühendisliği Bölümü, AGÜ, Mühendislik Fakültesi, Mühendislik Bilimleri Bölümü, 0-Belirlenecek |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Hydrogen Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology High-Mn steel 010402 general chemistry 01 natural sciences Dynamic strain aging Intergranular crack Composite material Ductility Renewable Energy Sustainability and the Environment Crack propagation Fracture mechanics Intergranular corrosion Strain rate 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Intergranular fracture Fuel Technology chemistry 0210 nano-technology Hydrogen embrittlement |
| Popis: | This work was financially supported by the Japan Science and Technology Agency (JST) (grant number: 20100113) under the Industry-Academia Collaborative R&D Program and JSPS KAKENHI (JP16H06365 and JP17H04956). B. Bal acknowledges the Scientific and Technological Research Council of Turkey (TUBITAK, Project No: 118M448). Effects of strain rate and hydrogen on crack propagation from a notch were investigated using a Fe-33Mn-1.1C steel by tension tests conducted at a cross head displacement speeds of 10(-2) and 10(-4) mm/s. Decreasing cross head displacement speed reduced the elongation by promoting intergranular crack initiation at the notch tip, whereas the crack propagation path was unaffected by the strain rate. Intergranular cracking in the studied steel was mainly caused by plasticity-driven mechanism of dynamic strain aging (DSA) and plasticity-driven damage along grain boundaries. With the introduction of hydrogen, decrease in yield strength due to cracking at the notch tip before yielding as well as reduction in elongation were observed. Coexistence of several hydrogen embrittlement mechanisms, such as hydrogen enhanced decohesion (HEDE) and hydrogen enhanced localized plasticity (HELP) were observed at and further away from the notch tip resulting in hydrogen assisted intergranular fracture and cracking which was the key reason behind the ductility reduction. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. apan Science and Technology Agency (JST) under the Industry-Academia Collaborative RD Program 20100113 Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research (KAKENHI) JP16H06365 JP17H04956 Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) 118M448 |
| Databáze: | OpenAIRE |
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