Inhibiting weld cracking in high-strength aluminium alloys
Cracking from a fine equiaxed zone (FQZ), often just tens of microns across, plagues the welding of 7000 series aluminum alloys. Using a multiscale correlative methodology, from the millimeter scale to the nanoscale, we shed light on the strengthening mechanisms and the resulting intergranular failu...
| Main Authors: | , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Springer Nature
2022
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| _version_ | 1797108815269724160 |
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| author | Hu, Y Wu, S Guo, Y Shen, Z Korsunsky, AM Yu, Y Zhang, X Fu, Y Che, Z Xiao, T Lozano-Perez, S Yuan, Q Zhong, X Zeng, X Kang, G Withers, PJ |
| author_facet | Hu, Y Wu, S Guo, Y Shen, Z Korsunsky, AM Yu, Y Zhang, X Fu, Y Che, Z Xiao, T Lozano-Perez, S Yuan, Q Zhong, X Zeng, X Kang, G Withers, PJ |
| author_sort | Hu, Y |
| collection | OXFORD |
| description | Cracking from a fine equiaxed zone (FQZ), often just tens of microns across, plagues the welding of 7000 series aluminum alloys. Using a multiscale correlative methodology, from the millimeter scale to the nanoscale, we shed light on the strengthening mechanisms and the resulting intergranular failure at the FQZ. We show that intergranular AlCuMg phases give rise to cracking by micro-void nucleation and subsequent link-up due to the plastic incompatibility between the hard phases and soft (low precipitate density) grain interiors in the FQZ. To mitigate this, we propose a hybrid welding strategy exploiting laser beam oscillation and a pulsed magnetic field. This achieves a wavy and interrupted FQZ along with a higher precipitate density, thereby considerably increasing tensile strength over conventionally hybrid welded butt joints, and even friction stir welds. |
| first_indexed | 2024-03-07T07:32:08Z |
| format | Journal article |
| id | oxford-uuid:925d5086-6d02-4f44-b79b-f9556cc4a060 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:32:08Z |
| publishDate | 2022 |
| publisher | Springer Nature |
| record_format | dspace |
| spelling | oxford-uuid:925d5086-6d02-4f44-b79b-f9556cc4a0602023-02-07T15:57:05ZInhibiting weld cracking in high-strength aluminium alloysJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:925d5086-6d02-4f44-b79b-f9556cc4a060EnglishSymplectic ElementsSpringer Nature2022Hu, YWu, SGuo, YShen, ZKorsunsky, AMYu, YZhang, XFu, YChe, ZXiao, TLozano-Perez, SYuan, QZhong, XZeng, XKang, GWithers, PJCracking from a fine equiaxed zone (FQZ), often just tens of microns across, plagues the welding of 7000 series aluminum alloys. Using a multiscale correlative methodology, from the millimeter scale to the nanoscale, we shed light on the strengthening mechanisms and the resulting intergranular failure at the FQZ. We show that intergranular AlCuMg phases give rise to cracking by micro-void nucleation and subsequent link-up due to the plastic incompatibility between the hard phases and soft (low precipitate density) grain interiors in the FQZ. To mitigate this, we propose a hybrid welding strategy exploiting laser beam oscillation and a pulsed magnetic field. This achieves a wavy and interrupted FQZ along with a higher precipitate density, thereby considerably increasing tensile strength over conventionally hybrid welded butt joints, and even friction stir welds. |
| spellingShingle | Hu, Y Wu, S Guo, Y Shen, Z Korsunsky, AM Yu, Y Zhang, X Fu, Y Che, Z Xiao, T Lozano-Perez, S Yuan, Q Zhong, X Zeng, X Kang, G Withers, PJ Inhibiting weld cracking in high-strength aluminium alloys |
| title | Inhibiting weld cracking in high-strength aluminium alloys |
| title_full | Inhibiting weld cracking in high-strength aluminium alloys |
| title_fullStr | Inhibiting weld cracking in high-strength aluminium alloys |
| title_full_unstemmed | Inhibiting weld cracking in high-strength aluminium alloys |
| title_short | Inhibiting weld cracking in high-strength aluminium alloys |
| title_sort | inhibiting weld cracking in high strength aluminium alloys |
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