Tribological properties of plasma nitrided inconel 718
Inconel 718 was plasma nitrided using the various controlling parameters such as treatment temperature, treatment time and N2/H2 gas composition. It was found that the case growth rate is proportional to the square root of treatment time. Maximum microhardness of 1290HK which was 3 times harder than...
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| Format: | Theses and Dissertations |
| Language: | English |
| Published: |
2009
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| Online Access: | http://hdl.handle.net/10356/19988 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | Inconel 718 was plasma nitrided using the various controlling parameters such as treatment temperature, treatment time and N2/H2 gas composition. It was found that the case growth rate is proportional to the square root of treatment time. Maximum microhardness of 1290HK which was 3 times harder than the bulk metal was obtained with 600°C and N2/H2=1/1 after 9 hours of treatment. An uniform case depth of up to 10.5µm was obtained with 600°C and N2/H2=9/1 after 9 hours of treatment. A columnar structure caused by prolonged treatment under ionic bombardment was observed on the nitrided surface. |
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