{"title":"不同感应辅助搅拌摩擦焊接Inconel 718-AISI SS321接头的显微组织、力学和残余应力行为","authors":"Rituraj Bhattacharjee, Prabhat Chand Yadav, Tanmoy Medhi, Pankaj Biswas","doi":"10.1007/s12540-024-01863-x","DOIUrl":null,"url":null,"abstract":"<div><p>This study analyzes the microstructural evolution and mechanical properties of dissimilar induction-assisted friction stir welded (IAFSWed) Inconel 718 (IN718) and AISI stainless steel 321 (SS321) joints. Electron backscatter diffraction (EBSD) was conducted on specimens welded at 300 rpm 40 mm/min (300/40) and 450 rpm 70 mm/min (450/70). The grain boundary analysis showed that the 450/70 specimen had a higher fraction of high-angle grain boundaries (HAGBs) at 86.9%, with low-angle grain boundaries (LAGBs) at 13.1%. The lower Kernel average misorientation (KAM) value (0.945 ± 0.05) indicated reduced strain and residual stress, improving mechanical properties. In contrast, a “bi-model” grain structure with larger grains was seen in the 300/40 specimen. Microhardness tests revealed a 13.5% improvement in Inconel compared to steel for the 450/70 condition, leading to a tensile strength of 614.36 MPa, which is 88.26% of the SS321 base material. Fractographic analysis showed a predominantly ductile fracture mode, with fine (Ti, Nb)C and (Nb)C particles enhancing mechanical properties. Tool rotation speed affected stress distribution, with higher speeds producing lower residual stresses due to increased heat generation. X-ray diffraction (XRD) analysis revealed that longitudinal and transverse residual stresses were higher in the 300/40 specimen than in the 450/70 specimen.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"31 7","pages":"2082 - 2103"},"PeriodicalIF":4.0000,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Microstructural, Mechanical and Residual Stress Behaviour of Dissimilar Induction-Assisted Friction Stir Welded Inconel 718-AISI SS321 Joints\",\"authors\":\"Rituraj Bhattacharjee, Prabhat Chand Yadav, Tanmoy Medhi, Pankaj Biswas\",\"doi\":\"10.1007/s12540-024-01863-x\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This study analyzes the microstructural evolution and mechanical properties of dissimilar induction-assisted friction stir welded (IAFSWed) Inconel 718 (IN718) and AISI stainless steel 321 (SS321) joints. Electron backscatter diffraction (EBSD) was conducted on specimens welded at 300 rpm 40 mm/min (300/40) and 450 rpm 70 mm/min (450/70). The grain boundary analysis showed that the 450/70 specimen had a higher fraction of high-angle grain boundaries (HAGBs) at 86.9%, with low-angle grain boundaries (LAGBs) at 13.1%. The lower Kernel average misorientation (KAM) value (0.945 ± 0.05) indicated reduced strain and residual stress, improving mechanical properties. In contrast, a “bi-model” grain structure with larger grains was seen in the 300/40 specimen. Microhardness tests revealed a 13.5% improvement in Inconel compared to steel for the 450/70 condition, leading to a tensile strength of 614.36 MPa, which is 88.26% of the SS321 base material. Fractographic analysis showed a predominantly ductile fracture mode, with fine (Ti, Nb)C and (Nb)C particles enhancing mechanical properties. Tool rotation speed affected stress distribution, with higher speeds producing lower residual stresses due to increased heat generation. X-ray diffraction (XRD) analysis revealed that longitudinal and transverse residual stresses were higher in the 300/40 specimen than in the 450/70 specimen.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":703,\"journal\":{\"name\":\"Metals and Materials International\",\"volume\":\"31 7\",\"pages\":\"2082 - 2103\"},\"PeriodicalIF\":4.0000,\"publicationDate\":\"2025-01-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Metals and Materials International\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s12540-024-01863-x\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Metals and Materials International","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s12540-024-01863-x","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Microstructural, Mechanical and Residual Stress Behaviour of Dissimilar Induction-Assisted Friction Stir Welded Inconel 718-AISI SS321 Joints
This study analyzes the microstructural evolution and mechanical properties of dissimilar induction-assisted friction stir welded (IAFSWed) Inconel 718 (IN718) and AISI stainless steel 321 (SS321) joints. Electron backscatter diffraction (EBSD) was conducted on specimens welded at 300 rpm 40 mm/min (300/40) and 450 rpm 70 mm/min (450/70). The grain boundary analysis showed that the 450/70 specimen had a higher fraction of high-angle grain boundaries (HAGBs) at 86.9%, with low-angle grain boundaries (LAGBs) at 13.1%. The lower Kernel average misorientation (KAM) value (0.945 ± 0.05) indicated reduced strain and residual stress, improving mechanical properties. In contrast, a “bi-model” grain structure with larger grains was seen in the 300/40 specimen. Microhardness tests revealed a 13.5% improvement in Inconel compared to steel for the 450/70 condition, leading to a tensile strength of 614.36 MPa, which is 88.26% of the SS321 base material. Fractographic analysis showed a predominantly ductile fracture mode, with fine (Ti, Nb)C and (Nb)C particles enhancing mechanical properties. Tool rotation speed affected stress distribution, with higher speeds producing lower residual stresses due to increased heat generation. X-ray diffraction (XRD) analysis revealed that longitudinal and transverse residual stresses were higher in the 300/40 specimen than in the 450/70 specimen.
期刊介绍：
Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.
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