EXPERIMENTAL STUDY ON FRACTURE TOUGHNESS OF MULTILAYER WELD JOINT BASED ON MICROSTRUCTURE
Quasistatic fracture toughness tests have done on SAW multilayer weld joint of Ni Cr Mo V scaled steel. The test result shows that the dispersion of fracture toughness J of SAW multilayer weld joint was large. J-R fracture resistance curve was fit and critical Jc（ 25）with pop-in behavior were calcul...
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| Language: | zho |
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Editorial Office of Journal of Mechanical Strength
2015-01-01
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| Series: | Jixie qiangdu |
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| Online Access: | http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2015.01.012 |
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| author | WU HaiLi JIA GuoQing AN ChunXiang |
| author_facet | WU HaiLi JIA GuoQing AN ChunXiang |
| author_sort | WU HaiLi |
| collection | DOAJ |
| description | Quasistatic fracture toughness tests have done on SAW multilayer weld joint of Ni Cr Mo V scaled steel. The test result shows that the dispersion of fracture toughness J of SAW multilayer weld joint was large. J-R fracture resistance curve was fit and critical Jc（ 25）with pop-in behavior were calculated according to the different of brittle and ductile fracture phenomenon.The crack initiation parts of brittle and ductile fracture of multilayer welding specimens were analyzed respectively by scanning electron microscopy. There is a great relation between the multilayer weld fracture toughness and the position of pre-crack tip in the weld joints. Analysis and research have been done about the cause of formation of different microstructures of multilayer and effects on fracture toughness properties. It is known that the complex organization of bold columnar crystals, incomplete recrystallized coarse grain and incomplete recrystallized fine grain alternating exists is the essential cause of the large dispersion of fracture toughness. |
| format | Article |
| id | doaj-art-5aae1356517d46f2838a6815d72977c9 |
| institution | Kabale University |
| issn | 1001-9669 |
| language | zho |
| publishDate | 2015-01-01 |
| publisher | Editorial Office of Journal of Mechanical Strength |
| record_format | Article |
| series | Jixie qiangdu |
| spelling | doaj-art-5aae1356517d46f2838a6815d72977c92025-01-15T02:39:08ZzhoEditorial Office of Journal of Mechanical StrengthJixie qiangdu1001-96692015-01-0137586230590939EXPERIMENTAL STUDY ON FRACTURE TOUGHNESS OF MULTILAYER WELD JOINT BASED ON MICROSTRUCTUREWU HaiLiJIA GuoQingAN ChunXiangQuasistatic fracture toughness tests have done on SAW multilayer weld joint of Ni Cr Mo V scaled steel. The test result shows that the dispersion of fracture toughness J of SAW multilayer weld joint was large. J-R fracture resistance curve was fit and critical Jc（ 25）with pop-in behavior were calculated according to the different of brittle and ductile fracture phenomenon.The crack initiation parts of brittle and ductile fracture of multilayer welding specimens were analyzed respectively by scanning electron microscopy. There is a great relation between the multilayer weld fracture toughness and the position of pre-crack tip in the weld joints. Analysis and research have been done about the cause of formation of different microstructures of multilayer and effects on fracture toughness properties. It is known that the complex organization of bold columnar crystals, incomplete recrystallized coarse grain and incomplete recrystallized fine grain alternating exists is the essential cause of the large dispersion of fracture toughness.http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2015.01.012Multilayer weldMicrostructureFracture toughnessColumnar grained regionFine grained regionPop-in behavior |
| spellingShingle | WU HaiLi JIA GuoQing AN ChunXiang EXPERIMENTAL STUDY ON FRACTURE TOUGHNESS OF MULTILAYER WELD JOINT BASED ON MICROSTRUCTURE Jixie qiangdu Multilayer weld Microstructure Fracture toughness Columnar grained region Fine grained region Pop-in behavior |
| title | EXPERIMENTAL STUDY ON FRACTURE TOUGHNESS OF MULTILAYER WELD JOINT BASED ON MICROSTRUCTURE |
| title_full | EXPERIMENTAL STUDY ON FRACTURE TOUGHNESS OF MULTILAYER WELD JOINT BASED ON MICROSTRUCTURE |
| title_fullStr | EXPERIMENTAL STUDY ON FRACTURE TOUGHNESS OF MULTILAYER WELD JOINT BASED ON MICROSTRUCTURE |
| title_full_unstemmed | EXPERIMENTAL STUDY ON FRACTURE TOUGHNESS OF MULTILAYER WELD JOINT BASED ON MICROSTRUCTURE |
| title_short | EXPERIMENTAL STUDY ON FRACTURE TOUGHNESS OF MULTILAYER WELD JOINT BASED ON MICROSTRUCTURE |
| title_sort | experimental study on fracture toughness of multilayer weld joint based on microstructure |
| topic | Multilayer weld Microstructure Fracture toughness Columnar grained region Fine grained region Pop-in behavior |
| url | http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2015.01.012 |
| work_keys_str_mv | AT wuhaili experimentalstudyonfracturetoughnessofmultilayerweldjointbasedonmicrostructure AT jiaguoqing experimentalstudyonfracturetoughnessofmultilayerweldjointbasedonmicrostructure AT anchunxiang experimentalstudyonfracturetoughnessofmultilayerweldjointbasedonmicrostructure |