Hydrogen-enhanced cracking revealed by in situ micro-cantilever bending test inside environmental scanning electron microscope
© 2017 The Author(s) Published by the Royal Society. All rights reserved. To evaluate the hydrogen (H)-induced embrittlement in iron aluminium intermetallics, especially the one with stoichiometric composition of 50 at.% Al, a novel in situ micro-cantilever bending test was applied within an environ...
| Main Authors: | , , |
|---|---|
| Format: | Journal Article |
| Published: |
The Royal Society Publishing
2017
|
| Online Access: | http://hdl.handle.net/20.500.11937/71305 |
| _version_ | 1848762444979109888 |
|---|---|
| author | Deng, Y. Hajilou, T. Barnoush, Afrooz |
| author_facet | Deng, Y. Hajilou, T. Barnoush, Afrooz |
| author_sort | Deng, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2017 The Author(s) Published by the Royal Society. All rights reserved. To evaluate the hydrogen (H)-induced embrittlement in iron aluminium intermetallics, especially the one with stoichiometric composition of 50 at.% Al, a novel in situ micro-cantilever bending test was applied within an environmental scanning electron microscope (ESEM), which provides both a full process monitoring and a clean, in situ H-charging condition. Two sets of cantilevers were analysed in this work: one set of un-notched cantilevers, and the other set with focused ion beam-milled notch laying on two crystallographic planes: (010) and (110). The cantilevers were tested under two environmental conditions: vacuum (approximately 5×10-4 Pa) and ESEM (450 Pa water vapour). Crack initiation at stressconcentrated locations and propagation to cause catastrophic failure were observed when cantilevers were tested in the presence of H; while no cracking occurred when tested in vacuum. Both the bending strength for un-notched beams and the fracture toughness for notched beams were reduced under H exposure. The hydrogen embrittlement (HE) susceptibility was found to be orientation dependent: The (010) crystallographic plane was more fragile to HE than the (110) plane. |
| first_indexed | 2025-11-14T10:47:40Z |
| format | Journal Article |
| id | curtin-20.500.11937-71305 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:47:40Z |
| publishDate | 2017 |
| publisher | The Royal Society Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-713052018-12-13T09:32:18Z Hydrogen-enhanced cracking revealed by in situ micro-cantilever bending test inside environmental scanning electron microscope Deng, Y. Hajilou, T. Barnoush, Afrooz © 2017 The Author(s) Published by the Royal Society. All rights reserved. To evaluate the hydrogen (H)-induced embrittlement in iron aluminium intermetallics, especially the one with stoichiometric composition of 50 at.% Al, a novel in situ micro-cantilever bending test was applied within an environmental scanning electron microscope (ESEM), which provides both a full process monitoring and a clean, in situ H-charging condition. Two sets of cantilevers were analysed in this work: one set of un-notched cantilevers, and the other set with focused ion beam-milled notch laying on two crystallographic planes: (010) and (110). The cantilevers were tested under two environmental conditions: vacuum (approximately 5×10-4 Pa) and ESEM (450 Pa water vapour). Crack initiation at stressconcentrated locations and propagation to cause catastrophic failure were observed when cantilevers were tested in the presence of H; while no cracking occurred when tested in vacuum. Both the bending strength for un-notched beams and the fracture toughness for notched beams were reduced under H exposure. The hydrogen embrittlement (HE) susceptibility was found to be orientation dependent: The (010) crystallographic plane was more fragile to HE than the (110) plane. 2017 Journal Article http://hdl.handle.net/20.500.11937/71305 10.1098/rsta.2017.0106 The Royal Society Publishing restricted |
| spellingShingle | Deng, Y. Hajilou, T. Barnoush, Afrooz Hydrogen-enhanced cracking revealed by in situ micro-cantilever bending test inside environmental scanning electron microscope |
| title | Hydrogen-enhanced cracking revealed by in situ micro-cantilever bending test inside environmental scanning electron microscope |
| title_full | Hydrogen-enhanced cracking revealed by in situ micro-cantilever bending test inside environmental scanning electron microscope |
| title_fullStr | Hydrogen-enhanced cracking revealed by in situ micro-cantilever bending test inside environmental scanning electron microscope |
| title_full_unstemmed | Hydrogen-enhanced cracking revealed by in situ micro-cantilever bending test inside environmental scanning electron microscope |
| title_short | Hydrogen-enhanced cracking revealed by in situ micro-cantilever bending test inside environmental scanning electron microscope |
| title_sort | hydrogen-enhanced cracking revealed by in situ micro-cantilever bending test inside environmental scanning electron microscope |
| url | http://hdl.handle.net/20.500.11937/71305 |