期刊名称：Eastern-European Journal of Enterprise Technologies
印刷版ISSN：1729-3774
电子版ISSN：1729-4061
出版年度：2021
卷号：5
期号：12
页码：60-68
DOI：10.15587/1729-4061.2021.243236
语种：English
出版社：PC Technology Center
摘要：This research is focused on increasing the?reliability?of Fe-11Al-Mn by combining the properties of Mn and the superiority of Fe-Al-C?under?cryogenic temperature. Three Fe-11Al-Mn alloys with compositions of 15?wt?% Mn (F15), 20?wt?% Mn (F20), and 25?wt?% Mn (F25) were investigated. The cryogenic process uses liquid nitrogen in a temperature range of 0–196?°C. Hardness testing using the Vickers method and SEM was used to analyze the microstructure. X-ray diffraction (XRD) testing was?conducted?to ensure the Fe-11Al-Mn alloy phase and corrosion testing was carried out using the three-electrode cell polarization method. With the addition of Mn, the Vickers hardness of the Fe-11Al-Mn alloy decreased from 331.50?VHN at 15?wt?% to 297.91?VHN at 25?wt?%. The value of tensile strength and fracture elongation values were 742.21?MPa, 35.3?%?EI; 789.03?MPa, 41.2?%?EI; and 894.42?MPa, 50.2?% EI, for F15, F20, and F25, respectively. An important factor for improving the performance of cryogenic materials is the impact mechanism. The resulting impact toughness increased by 2.85?J/mm2?to 3.30?J/mm2?for F.15 and F25, respectively. The addition of the element Mn increases the corrosion resistance of the Fe-11Al-Mn alloy. The lowest corrosion rate occurs at 25?% wt Mn to 0.016?mm/year. Based on the results, the F25 alloy has the highest mechanical and corrosion resistance of the three types of alloys?equivalent to SS 304 stainless steel. The microstructure of Fe-11Al-Mn?alloy was similar between before and after cryogenic temperature treatment, this condition showed that the microstructure did not change during the process. From the overall results, the Fa-11Al-Mn alloy is a promising candidate for material applications working at cryogenic temperatures by optimizing the Mn content.
关键词：Fe-11Al-Mn;Microstructure;Mechanical characteristics;Impact;Corrosion resistance;Cryogenic temperature
