{"title":"Effect of Al 2 Ca on Oxidation Resistance and Tensile Property of Al-5Mg Alloy","authors":"S. Ha, Y. Yoon, S. Kim","doi":"10.7777/JKFS.2014.34.6.194","DOIUrl":null,"url":null,"abstract":"The effect of Al 2 Ca on the oxidation resistance and tensile property of Al-5Mg alloys was investigated. According to the TGA (Thermogravimetric analysis) result at 550 o C after 24hrs, the Al-5Mg alloy showed parabolic behavior with weight gain. On the other hand, there was almost no difference in the weight changes of the Al 2 Ca added Al-5Mg alloys during the oxidation. It was thought that the improvement of oxidation resistance in Al 2 Ca added Al-5Mg alloys might be due to the formation of a protective oxide layer with CaO and MgO on the surface. The microstructures of the alloys showed grain refinement with an increasing Al 2 Ca content. From the tensile test, the yield strength of the alloys were improved with an increasing Al 2 Ca content. The 0.07 mass%Al 2 Ca added Al-5Mg alloy showed similar elongation and increased strength, simultaneously. It was considered that the addi-tion of Al 2 Ca, which was superior in the oxidation resistance of Al, reduced the formation of Mg oxides and inclusions during the alloying. This, partly led to the improvement of tensile properties.","PeriodicalId":16318,"journal":{"name":"Journal of Korea Foundry Society","volume":"2 1","pages":"194-199"},"PeriodicalIF":0.0000,"publicationDate":"2014-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"7","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Korea Foundry Society","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.7777/JKFS.2014.34.6.194","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 7
Abstract
The effect of Al 2 Ca on the oxidation resistance and tensile property of Al-5Mg alloys was investigated. According to the TGA (Thermogravimetric analysis) result at 550 o C after 24hrs, the Al-5Mg alloy showed parabolic behavior with weight gain. On the other hand, there was almost no difference in the weight changes of the Al 2 Ca added Al-5Mg alloys during the oxidation. It was thought that the improvement of oxidation resistance in Al 2 Ca added Al-5Mg alloys might be due to the formation of a protective oxide layer with CaO and MgO on the surface. The microstructures of the alloys showed grain refinement with an increasing Al 2 Ca content. From the tensile test, the yield strength of the alloys were improved with an increasing Al 2 Ca content. The 0.07 mass%Al 2 Ca added Al-5Mg alloy showed similar elongation and increased strength, simultaneously. It was considered that the addi-tion of Al 2 Ca, which was superior in the oxidation resistance of Al, reduced the formation of Mg oxides and inclusions during the alloying. This, partly led to the improvement of tensile properties.