Dening Zou, Miaomiao Li, Yunong Li, Pengbo Hui, Chan He
{"title":"254SMO不锈钢凝固过程中Sigma和铁素体相的析出行为：Ce元素的影响","authors":"Dening Zou, Miaomiao Li, Yunong Li, Pengbo Hui, Chan He","doi":"10.1007/s12540-025-01941-8","DOIUrl":null,"url":null,"abstract":"<div><p>Different Ce contents added to 254SMO super austenitic stainless steel (254SMO-Ce<sub>x</sub>) are prepared by vacuum arc melting method, and the solidification structure evolution at a cooling rate of 100 °C min<sup>−1</sup> is observed by high-temperature confocal scanning laser microscopy (HT-CSLM). The results show that the dendritic solidification structure of 254SMO-Ce<sub>x</sub> is significantly refined and the initial solidification temperature decreases with the increase of Ce contents. The addition of Ce element significantly increases the number of austenite nucleation and changes the types of inclusions in the 254SMO. The inclusions in 254SMO are mainly Al<sub>2</sub>O<sub>3</sub> and Ca–Mg–Al–O spherical oxides, and the inclusions in 254SMO-Ce<sub>x</sub> are Ce<sub>2</sub>O<sub>3</sub>, and the number and size of inclusions increase with the increase of Ce contents. In addition, Ce element changes the morphology and precipitation mechanism of sigma (σ) and ferrite (δ) phases. Both δ and σ phases precipitated in 254SMO-Ce<sub>x</sub> are formed by a divorced eutectic reaction in the later stage of solidification, and are mainly distributed in the interdendritic position and grain boundary of the crystal, respectively.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"31 11","pages":"3204 - 3215"},"PeriodicalIF":4.0000,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Precipitation Behavior of Sigma and Ferrite Phases During Solidification in 254SMO Stainless Steel: Effect of Ce Elements\",\"authors\":\"Dening Zou, Miaomiao Li, Yunong Li, Pengbo Hui, Chan He\",\"doi\":\"10.1007/s12540-025-01941-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Different Ce contents added to 254SMO super austenitic stainless steel (254SMO-Ce<sub>x</sub>) are prepared by vacuum arc melting method, and the solidification structure evolution at a cooling rate of 100 °C min<sup>−1</sup> is observed by high-temperature confocal scanning laser microscopy (HT-CSLM). The results show that the dendritic solidification structure of 254SMO-Ce<sub>x</sub> is significantly refined and the initial solidification temperature decreases with the increase of Ce contents. The addition of Ce element significantly increases the number of austenite nucleation and changes the types of inclusions in the 254SMO. The inclusions in 254SMO are mainly Al<sub>2</sub>O<sub>3</sub> and Ca–Mg–Al–O spherical oxides, and the inclusions in 254SMO-Ce<sub>x</sub> are Ce<sub>2</sub>O<sub>3</sub>, and the number and size of inclusions increase with the increase of Ce contents. In addition, Ce element changes the morphology and precipitation mechanism of sigma (σ) and ferrite (δ) phases. Both δ and σ phases precipitated in 254SMO-Ce<sub>x</sub> are formed by a divorced eutectic reaction in the later stage of solidification, and are mainly distributed in the interdendritic position and grain boundary of the crystal, respectively.</p><h3>Graphical Abstract</h3>\\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":703,\"journal\":{\"name\":\"Metals and Materials International\",\"volume\":\"31 11\",\"pages\":\"3204 - 3215\"},\"PeriodicalIF\":4.0000,\"publicationDate\":\"2025-03-29\",\"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/s12540-025-01941-8\",\"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/s12540-025-01941-8","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}
Precipitation Behavior of Sigma and Ferrite Phases During Solidification in 254SMO Stainless Steel: Effect of Ce Elements
Different Ce contents added to 254SMO super austenitic stainless steel (254SMO-Cex) are prepared by vacuum arc melting method, and the solidification structure evolution at a cooling rate of 100 °C min−1 is observed by high-temperature confocal scanning laser microscopy (HT-CSLM). The results show that the dendritic solidification structure of 254SMO-Cex is significantly refined and the initial solidification temperature decreases with the increase of Ce contents. The addition of Ce element significantly increases the number of austenite nucleation and changes the types of inclusions in the 254SMO. The inclusions in 254SMO are mainly Al2O3 and Ca–Mg–Al–O spherical oxides, and the inclusions in 254SMO-Cex are Ce2O3, and the number and size of inclusions increase with the increase of Ce contents. In addition, Ce element changes the morphology and precipitation mechanism of sigma (σ) and ferrite (δ) phases. Both δ and σ phases precipitated in 254SMO-Cex are formed by a divorced eutectic reaction in the later stage of solidification, and are mainly distributed in the interdendritic position and grain boundary of the crystal, 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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