{"title":"STUDY OF INTERGRANULAR CORROSION ON NON-HEAT TREATABLE ALUMINUM ALLOYS IN A COMPRESSOR AFTER-COOLER","authors":"D. N. Adnyana","doi":"10.14203/METALURGI.V36I1.574","DOIUrl":null,"url":null,"abstract":"This study was carried out on a compressor heat exchanger (after-cooler) which had a leak in the welded joint of its components made of non-heat treatable aluminum alloys. The purpose of this study is to determine the type and cause, and mechanisms of failure associated with the metallurgical structure that occurs. In this study a number of tests have been carried out including visual and macroscopic examinations, metallographic and hardness testing, and SEM (scanning electron microscopy) analysis equipped with EDS (energy dispersive spectroscopy). The results of the study obtained indicate that the failure mechanism that causes leakage in the aluminum alloy welding joints of the compressor heat exchanger component is intergranular corrosion due to sensitization and the related effect of environmental factors that occur. In addition, the failure may also be affected by welding defect in the form of pinholes.","PeriodicalId":18462,"journal":{"name":"Metalurgija","volume":"36 1","pages":"7"},"PeriodicalIF":0.6000,"publicationDate":"2021-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Metalurgija","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.14203/METALURGI.V36I1.574","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
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Abstract
This study was carried out on a compressor heat exchanger (after-cooler) which had a leak in the welded joint of its components made of non-heat treatable aluminum alloys. The purpose of this study is to determine the type and cause, and mechanisms of failure associated with the metallurgical structure that occurs. In this study a number of tests have been carried out including visual and macroscopic examinations, metallographic and hardness testing, and SEM (scanning electron microscopy) analysis equipped with EDS (energy dispersive spectroscopy). The results of the study obtained indicate that the failure mechanism that causes leakage in the aluminum alloy welding joints of the compressor heat exchanger component is intergranular corrosion due to sensitization and the related effect of environmental factors that occur. In addition, the failure may also be affected by welding defect in the form of pinholes.
期刊介绍：
The journal Metalurgija is primary scientific periodical that publishes scientific papers (original papers, preliminary notes, reviewed papers) as well as professional papers from the area of basic, applicable and developing researching in metallurgy and boundary metallurgy areas (physics, chemistry, mechanical engineering). These papers relate to processing ferrous and non-ferrous metallurgy, treating investigating as well as testing of raw materials, semi products and products, especially in the area of improving new materials and possibilities of their implementation. The journal is the only national periodical of this kind in the Republic of Croatia and covers the scientific field of metallurgy, especially:
physical metallurgy and materials;
process metailurgy, (ferrous and non-ferrous);
mechanical metallurgy (processing, power , etc.);
related (adjoing) branches: mechanlcal engineering, chemistry, physics etc.
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