High Temperature Isothermal Oxidation at 950°C of Ni-based Fe-40Ni-24Cr Alloy
The effect of different heat treatment temperatures on the isothermal oxidation of Ni-based Fe-40Ni-24Cr alloy was studied. The alloy underwent a heat treatment process at 1000°C and 1200°C for 3 hours of soaking time, followed by water quenching. These samples are labeled as N10 and N12. The heat-t...
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Polish Academy of Sciences
2024-09-01
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| Series: | Archives of Metallurgy and Materials |
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| Online Access: | https://journals.pan.pl/Content/132692/AMM-2024-3-43-Perimin.pdf |
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| author | A.I. Anuar N. Parimin N.A. Ahad M.N. Derman S. Garus P. Vizureanu |
| author_facet | A.I. Anuar N. Parimin N.A. Ahad M.N. Derman S. Garus P. Vizureanu |
| author_sort | A.I. Anuar |
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| description | The effect of different heat treatment temperatures on the isothermal oxidation of Ni-based Fe-40Ni-24Cr alloy was studied. The alloy underwent a heat treatment process at 1000°C and 1200°C for 3 hours of soaking time, followed by water quenching. These samples are labeled as N10 and N12. The heat-treated samples were characterized in terms of grain size using an optical microscope and hardness testing using a Rockwell hardness. As a result, increasing the heat treatment temperature increases the average grain size of the alloy and lowers the hardness value. Heat-treated N10 and N12 samples were subjected to an isothermal oxidation test at 950°C for an exposure time of 150 h. Oxidized heat-treated samples were characterized in terms of oxidation kinetics calculated based on weight change per surface area as a function of time. In addition, phase analysis and oxide surface morphology were measured using x-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. As a result, the oxidation kinetics of both samples showed a pattern of weight gain with N10 recording the lowest weight gain. Both samples obey a parabolic rate law, indicating a controlled oxide growth rate. N10 recorded the lowest parabolic rate constant of 2.5×10–8 mg2cm–4s–1, indicating a low oxidation rate, thus having good oxidation resistance. Phase analysis using XRD shows that several oxide phases have been formed consisting of Cr-containing oxides Cr2O3 and MnCr2O4. In addition, SEM analysis displayed a uniform oxide layer formed on the N10 sample, indicating good oxide adhesion. This finding shows an important contribution to the oxidation protection mechanism that records the fine grain obtained from the heat treatment process can increase good oxidation resistance. |
| format | Article |
| id | doaj-art-a3dce626d4e94066bd603c4d9fef2730 |
| institution | Kabale University |
| issn | 2300-1909 |
| language | English |
| publishDate | 2024-09-01 |
| publisher | Polish Academy of Sciences |
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| series | Archives of Metallurgy and Materials |
| spelling | doaj-art-a3dce626d4e94066bd603c4d9fef27302024-12-27T14:07:47ZengPolish Academy of SciencesArchives of Metallurgy and Materials2300-19092024-09-01vol. 69No 311911198https://doi.org/10.24425/amm.2024.150942High Temperature Isothermal Oxidation at 950°C of Ni-based Fe-40Ni-24Cr AlloyA.I. Anuar0N. Parimin1https://orcid.org/0000-0003-2069-7207N.A. Ahad2M.N. Derman3S. Garus4https://orcid.org/0000-0002-6649-5435P. Vizureanu5https://orcid.org/0000-0002-3593-9400Universiti Malaysia Perlis (UniMAP), Faculty of Chemical Engineering & Technology, 02600 Arau, Perlis, MalayisaUniversiti Malaysia Perlis (UniMAP), Faculty of Chemical Engineering & Technology, 02600 Arau, Perlis, MalayisaUniversiti Malaysia Perlis (UniMAP), Faculty of Chemical Engineering & Technology, 02600 Arau, Perlis, MalayisaUniversiti Malaysia Perlis (UniMAP), Faculty of Mechanical Engineering & Technology, 02600 Arau, Perlis, MalayisaCzestochowa University of Technology, Faculty of Mechanical Engineering and Computer Science, 42-201 Częstochowa, PolandGheorghe Asachi Technical University of Iasi, Faculty of Mat erial Science and Engineering, 41 D. Mangeron St., 700050 Iasi, RomaniaThe effect of different heat treatment temperatures on the isothermal oxidation of Ni-based Fe-40Ni-24Cr alloy was studied. The alloy underwent a heat treatment process at 1000°C and 1200°C for 3 hours of soaking time, followed by water quenching. These samples are labeled as N10 and N12. The heat-treated samples were characterized in terms of grain size using an optical microscope and hardness testing using a Rockwell hardness. As a result, increasing the heat treatment temperature increases the average grain size of the alloy and lowers the hardness value. Heat-treated N10 and N12 samples were subjected to an isothermal oxidation test at 950°C for an exposure time of 150 h. Oxidized heat-treated samples were characterized in terms of oxidation kinetics calculated based on weight change per surface area as a function of time. In addition, phase analysis and oxide surface morphology were measured using x-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. As a result, the oxidation kinetics of both samples showed a pattern of weight gain with N10 recording the lowest weight gain. Both samples obey a parabolic rate law, indicating a controlled oxide growth rate. N10 recorded the lowest parabolic rate constant of 2.5×10–8 mg2cm–4s–1, indicating a low oxidation rate, thus having good oxidation resistance. Phase analysis using XRD shows that several oxide phases have been formed consisting of Cr-containing oxides Cr2O3 and MnCr2O4. In addition, SEM analysis displayed a uniform oxide layer formed on the N10 sample, indicating good oxide adhesion. This finding shows an important contribution to the oxidation protection mechanism that records the fine grain obtained from the heat treatment process can increase good oxidation resistance.https://journals.pan.pl/Content/132692/AMM-2024-3-43-Perimin.pdfni-based fe-ni-cr alloyshaynes hr-120 alloysisothermal oxidationheat treatmentoxidation kinetics |
| spellingShingle | A.I. Anuar N. Parimin N.A. Ahad M.N. Derman S. Garus P. Vizureanu High Temperature Isothermal Oxidation at 950°C of Ni-based Fe-40Ni-24Cr Alloy Archives of Metallurgy and Materials ni-based fe-ni-cr alloys haynes hr-120 alloys isothermal oxidation heat treatment oxidation kinetics |
| title | High Temperature Isothermal Oxidation at 950°C of Ni-based Fe-40Ni-24Cr Alloy |
| title_full | High Temperature Isothermal Oxidation at 950°C of Ni-based Fe-40Ni-24Cr Alloy |
| title_fullStr | High Temperature Isothermal Oxidation at 950°C of Ni-based Fe-40Ni-24Cr Alloy |
| title_full_unstemmed | High Temperature Isothermal Oxidation at 950°C of Ni-based Fe-40Ni-24Cr Alloy |
| title_short | High Temperature Isothermal Oxidation at 950°C of Ni-based Fe-40Ni-24Cr Alloy |
| title_sort | high temperature isothermal oxidation at 950°c of ni based fe 40ni 24cr alloy |
| topic | ni-based fe-ni-cr alloys haynes hr-120 alloys isothermal oxidation heat treatment oxidation kinetics |
| url | https://journals.pan.pl/Content/132692/AMM-2024-3-43-Perimin.pdf |
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