Optimum rotational speed in FSW of copper canisters for nuclear waste
The high-level radioactive waste will be encapsulated in copper canisters and stored in a deep repository. High power electron beam welding was the only viable method available at that time for welding thick section copper. In recent years, friction stir welding has been replaced with electron beam...
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| Format: | Article |
| Language: | fas |
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Nuclear Science and Technology Research Institute
2016-02-01
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| Series: | مجله علوم و فنون هسته‌ای |
| Subjects: | |
| Online Access: | https://jonsat.nstri.ir/article_97_8d3d68867fdaa027f3f3c7c5e8a760c6.pdf |
| _version_ | 1797835090273763328 |
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| author | Mehrdad Ajabshiri Hasan Rezaei Ezat Nazari Ahmad Nozad Golikand |
| author_facet | Mehrdad Ajabshiri Hasan Rezaei Ezat Nazari Ahmad Nozad Golikand |
| author_sort | Mehrdad Ajabshiri |
| collection | DOAJ |
| description | The high-level radioactive waste will be encapsulated in copper canisters and stored in a deep repository. High power electron beam welding was the only viable method available at that time for welding thick section copper. In recent years, friction stir welding has been replaced with electron beam welding because of the promotion in mechanical properties and corrosion resistance of copper canisters. FSW is used in solid state, therefore residual stresses produced in the weld is less than that of other welding processes which are performed in the molten state. To obtain optimum rotational speed, FSW was carried out in copper plates with a thickness of 4 mm at a constant speed of 25 mm/minute. The temperature distribution indicated a severe increasing of temperature upon increasing the rotational speed from 900 to 1200 rpm. Also, analysis of the metallographic images showed that the grain size in the nugget zone increases by increasing the rotational speed. Vickers hardness test was conducted on the welded samples and the maximum hardness was obtained at a rotational speed of 900 rpm. Results of tensile tests and their comparison with those of the base metal showed that the maximum strength and minimum elongation are achieved at the same rotational speed. |
| first_indexed | 2024-04-09T14:47:41Z |
| format | Article |
| id | doaj.art-4fdf48ad081345fb995fdcfb2b98b80d |
| institution | Directory Open Access Journal |
| issn | 1735-1871 2676-5861 |
| language | fas |
| last_indexed | 2024-04-09T14:47:41Z |
| publishDate | 2016-02-01 |
| publisher | Nuclear Science and Technology Research Institute |
| record_format | Article |
| series | مجله علوم و فنون هسته‌ای |
| spelling | doaj.art-4fdf48ad081345fb995fdcfb2b98b80d2023-05-02T10:27:19ZfasNuclear Science and Technology Research Instituteمجله علوم و فنون هسته‌ای1735-18712676-58612016-02-01364839097Optimum rotational speed in FSW of copper canisters for nuclear wasteMehrdad Ajabshiri0Hasan Rezaei1Ezat Nazari2Ahmad Nozad Golikand3پژوهشکده‌ی مواد، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 1589-81465، اصفهان ـ ایرانپژوهشکده‌ی مواد، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 1589-81465، اصفهان ـ ایرانپژوهشکده‌ی مواد، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 1589-81465، اصفهان ـ ایرانپژوهشکده‌ی مواد، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 1589-81465، اصفهان ـ ایرانThe high-level radioactive waste will be encapsulated in copper canisters and stored in a deep repository. High power electron beam welding was the only viable method available at that time for welding thick section copper. In recent years, friction stir welding has been replaced with electron beam welding because of the promotion in mechanical properties and corrosion resistance of copper canisters. FSW is used in solid state, therefore residual stresses produced in the weld is less than that of other welding processes which are performed in the molten state. To obtain optimum rotational speed, FSW was carried out in copper plates with a thickness of 4 mm at a constant speed of 25 mm/minute. The temperature distribution indicated a severe increasing of temperature upon increasing the rotational speed from 900 to 1200 rpm. Also, analysis of the metallographic images showed that the grain size in the nugget zone increases by increasing the rotational speed. Vickers hardness test was conducted on the welded samples and the maximum hardness was obtained at a rotational speed of 900 rpm. Results of tensile tests and their comparison with those of the base metal showed that the maximum strength and minimum elongation are achieved at the same rotational speed.https://jonsat.nstri.ir/article_97_8d3d68867fdaa027f3f3c7c5e8a760c6.pdfnuclear wastefswmechanical propertiescopper |
| spellingShingle | Mehrdad Ajabshiri Hasan Rezaei Ezat Nazari Ahmad Nozad Golikand Optimum rotational speed in FSW of copper canisters for nuclear waste مجله علوم و فنون هسته‌ای nuclear waste fsw mechanical properties copper |
| title | Optimum rotational speed in FSW of copper canisters for nuclear waste |
| title_full | Optimum rotational speed in FSW of copper canisters for nuclear waste |
| title_fullStr | Optimum rotational speed in FSW of copper canisters for nuclear waste |
| title_full_unstemmed | Optimum rotational speed in FSW of copper canisters for nuclear waste |
| title_short | Optimum rotational speed in FSW of copper canisters for nuclear waste |
| title_sort | optimum rotational speed in fsw of copper canisters for nuclear waste |
| topic | nuclear waste fsw mechanical properties copper |
| url | https://jonsat.nstri.ir/article_97_8d3d68867fdaa027f3f3c7c5e8a760c6.pdf |
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