{"title":"Influence of Nanomodification on the Microstructure of the Metal of Welded Joints of Low-Alloy Steels","authors":"V. V. Golovko, V. A. Kostin, V. V. Zhukov","doi":"10.1007/s11003-024-00838-y","DOIUrl":null,"url":null,"abstract":"<p>The inoculation of nano-sized particles of refractory Al<sub>2</sub>O<sub>3</sub>, TiO<sub>2</sub>, MgO, ZrO<sub>2</sub> oxides into the welding bath was studied. The inoculation of oxides with a low-level mismatch to the δ-Fe lattice and increased wetting with liquid iron ( MgO, ZrO<sub>2</sub>) contributes to the growth of dendrites, which are formed during melt crystallization. Metal modification with MgO, ZrO<sub>2</sub> oxides decreases the hardness of polygonal ferrite and increases the content of lower bainite in the microstructure of joints, brittle fracture resistance of the joint metal. Metal modification with Al<sub>2</sub>O<sub>3</sub>, TiO<sub>2</sub> oxides contributes to an increase in the hardness of polygonal ferrite, the content of upper bainite in the joint microstructure, and the strength of welded joints of low-alloy steels.</p>","PeriodicalId":18230,"journal":{"name":"Materials Science","volume":null,"pages":null},"PeriodicalIF":0.7000,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Science","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s11003-024-00838-y","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The inoculation of nano-sized particles of refractory Al2O3, TiO2, MgO, ZrO2 oxides into the welding bath was studied. The inoculation of oxides with a low-level mismatch to the δ-Fe lattice and increased wetting with liquid iron ( MgO, ZrO2) contributes to the growth of dendrites, which are formed during melt crystallization. Metal modification with MgO, ZrO2 oxides decreases the hardness of polygonal ferrite and increases the content of lower bainite in the microstructure of joints, brittle fracture resistance of the joint metal. Metal modification with Al2O3, TiO2 oxides contributes to an increase in the hardness of polygonal ferrite, the content of upper bainite in the joint microstructure, and the strength of welded joints of low-alloy steels.
期刊介绍：
Materials Science reports on current research into such problems as cracking, fatigue and fracture, especially in active environments as well as corrosion and anticorrosion protection of structural metallic and polymer materials, and the development of new materials.
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