{"title":"Experimental study on rapid evaluation of modification effect of hypoeutectic Al-Si alloy based on melt solidification process resistivity monitoring","authors":"Ao Wang, Jianming Dong, Dayong Li","doi":"10.31577/km.2022.3.139","DOIUrl":null,"url":null,"abstract":"In order to improve the accuracy of rapid evaluation of the modification effect of Al-Si alloy in front of the furnace, the relationship between resistivity change and modification level during melt solidification was experimentally studied. A melt resistivity monitoring system was designed for practical application, including a sample cup, sample cup base support, vacuum aspiration unit, constant current power supply, data acquisition module, and computer. The monitoring system was used to monitor the changes in temperature and resistivity parameters during solidification of ZL101A alloy melt treated with different amounts of Sr modifier. It was found that the curve of melt resistivity changes with temperature at the eutectic solidification stage had a plateau, and the resistivity plateau value decreased with the better alloy modification effect. Therefore, a rapid evaluation model was established of the hypoeutectic Al-Si alloy modification effect in front of the furnace based on resistivity change during melt solidification. The experimental results showed that the evaluation of the modification effect of the hypoeutectic Al-Si alloy could be completed within 3 minutes by using the monitoring system and evaluation model designed in this paper. The accuracy of the evaluation of modification level error within ± 0.5 reaches 80 % taking the metallographic observation method as the standard.","PeriodicalId":49937,"journal":{"name":"Kovove Materialy-Metallic Materials","volume":null,"pages":null},"PeriodicalIF":0.7000,"publicationDate":"2022-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Kovove Materialy-Metallic Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.31577/km.2022.3.139","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}
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Abstract
In order to improve the accuracy of rapid evaluation of the modification effect of Al-Si alloy in front of the furnace, the relationship between resistivity change and modification level during melt solidification was experimentally studied. A melt resistivity monitoring system was designed for practical application, including a sample cup, sample cup base support, vacuum aspiration unit, constant current power supply, data acquisition module, and computer. The monitoring system was used to monitor the changes in temperature and resistivity parameters during solidification of ZL101A alloy melt treated with different amounts of Sr modifier. It was found that the curve of melt resistivity changes with temperature at the eutectic solidification stage had a plateau, and the resistivity plateau value decreased with the better alloy modification effect. Therefore, a rapid evaluation model was established of the hypoeutectic Al-Si alloy modification effect in front of the furnace based on resistivity change during melt solidification. The experimental results showed that the evaluation of the modification effect of the hypoeutectic Al-Si alloy could be completed within 3 minutes by using the monitoring system and evaluation model designed in this paper. The accuracy of the evaluation of modification level error within ± 0.5 reaches 80 % taking the metallographic observation method as the standard.
期刊介绍：
Kovove Materialy - Metallic Materials is dedicated to publishing original theoretical and experimental papers concerned with structural, nanostructured, and functional metallic and selected non-metallic materials. Emphasis is placed on those aspects of the science of materials that address:
the relationship between the microstructure of materials and their properties, including mechanical, electrical, magnetic and chemical properties;
the relationship between the microstructure of materials and the thermodynamics, kinetics and mechanisms of processes;
the synthesis and processing of materials, with emphasis on microstructural mechanisms and control;
advances in the characterization of the microstructure and properties of materials with experiments and models which help in understanding the properties of materials.
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