{"title":"高温加热后不同Ti/N比Ca脱氧钢板haz组织及断裂特征","authors":"Yanli Chen, Jian Yang, Yinhui Zhang, Tingting Li, Yuqi Zhang","doi":"10.1007/s12540-024-01838-y","DOIUrl":null,"url":null,"abstract":"<div><p>The microstructure and fracture characteristic of heat affected zone (HAZ) of the Ca-deoxidized steel plates with the different Ti/N ratios of 1.61, 3.79, and 5.00 denoted as TN16, TN38, and TN50 steels were studied after the High Heat Input Welding (HHIW) of 400 kJ/cm. The ratio of the ductile zone to the total fracture surface area is 55% in TN38 steel, which is the largest among the three steels. The main cracks in TN16 and TN50 steels display a smooth shape propagating along grain boundaries, while in TN38 steel, main crack exhibits shape in a zigzag pattern. The EBSD results reveal that the brittle transgranular fracture occurs on the grain boundary ferrites (GBFs), ferrite side plates (FSPs) with θ < 15 ° in TN16 and TN50 steels, while the ductile fracture occurs on the intergranular acicular ferrites (IAFs) with θ > 45 ° in TN38 steel. The area fractions for IAFs in CGHAZ are 68.3%, 91.6%, and 50% for TN16, TN38, and TN50 steels, respectively. Thus, the low-temperature impact toughnesses of HAZ at -20℃ are 77, 165, and 33 J for TN16, TN38, and TN50 steels, respectively.</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 6","pages":"1754 - 1768"},"PeriodicalIF":3.3000,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Microstructure and Fracture Characteristics of HAZs of Ca- deoxidized Steel Plates with Different Ti/N Ratios After HHIW\",\"authors\":\"Yanli Chen, Jian Yang, Yinhui Zhang, Tingting Li, Yuqi Zhang\",\"doi\":\"10.1007/s12540-024-01838-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The microstructure and fracture characteristic of heat affected zone (HAZ) of the Ca-deoxidized steel plates with the different Ti/N ratios of 1.61, 3.79, and 5.00 denoted as TN16, TN38, and TN50 steels were studied after the High Heat Input Welding (HHIW) of 400 kJ/cm. The ratio of the ductile zone to the total fracture surface area is 55% in TN38 steel, which is the largest among the three steels. The main cracks in TN16 and TN50 steels display a smooth shape propagating along grain boundaries, while in TN38 steel, main crack exhibits shape in a zigzag pattern. The EBSD results reveal that the brittle transgranular fracture occurs on the grain boundary ferrites (GBFs), ferrite side plates (FSPs) with θ < 15 ° in TN16 and TN50 steels, while the ductile fracture occurs on the intergranular acicular ferrites (IAFs) with θ > 45 ° in TN38 steel. The area fractions for IAFs in CGHAZ are 68.3%, 91.6%, and 50% for TN16, TN38, and TN50 steels, respectively. Thus, the low-temperature impact toughnesses of HAZ at -20℃ are 77, 165, and 33 J for TN16, TN38, and TN50 steels, respectively.</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 6\",\"pages\":\"1754 - 1768\"},\"PeriodicalIF\":3.3000,\"publicationDate\":\"2024-11-11\",\"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/s12540-024-01838-y\",\"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/s12540-024-01838-y","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}
Microstructure and Fracture Characteristics of HAZs of Ca- deoxidized Steel Plates with Different Ti/N Ratios After HHIW
The microstructure and fracture characteristic of heat affected zone (HAZ) of the Ca-deoxidized steel plates with the different Ti/N ratios of 1.61, 3.79, and 5.00 denoted as TN16, TN38, and TN50 steels were studied after the High Heat Input Welding (HHIW) of 400 kJ/cm. The ratio of the ductile zone to the total fracture surface area is 55% in TN38 steel, which is the largest among the three steels. The main cracks in TN16 and TN50 steels display a smooth shape propagating along grain boundaries, while in TN38 steel, main crack exhibits shape in a zigzag pattern. The EBSD results reveal that the brittle transgranular fracture occurs on the grain boundary ferrites (GBFs), ferrite side plates (FSPs) with θ < 15 ° in TN16 and TN50 steels, while the ductile fracture occurs on the intergranular acicular ferrites (IAFs) with θ > 45 ° in TN38 steel. The area fractions for IAFs in CGHAZ are 68.3%, 91.6%, and 50% for TN16, TN38, and TN50 steels, respectively. Thus, the low-temperature impact toughnesses of HAZ at -20℃ are 77, 165, and 33 J for TN16, TN38, and TN50 steels, respectively.
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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