Chip formation mechanism and machinability of wrought duplex stainless steel alloys
This paper investigates the chip formation mechanism and machinability of two-phase materials, such as, wrought duplex stainless steel alloys SAF 2205 and SAF 2507. SEM and optical microscopic details of the frozen cutting zone and chips revealed that the harder austenite phase dissipates in the adv...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Springer
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/39983 |
| _version_ | 1848755742878728192 |
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| author | Nomani, J. Pramanik, Alokesh Hilditch, T. Littlefair, G. |
| author_facet | Nomani, J. Pramanik, Alokesh Hilditch, T. Littlefair, G. |
| author_sort | Nomani, J. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | This paper investigates the chip formation mechanism and machinability of two-phase materials, such as, wrought duplex stainless steel alloys SAF 2205 and SAF 2507. SEM and optical microscopic details of the frozen cutting zone and chips revealed that the harder austenite phase dissipates in the advancement of the cutting tool, being effectively squeezed out of the softer ferrite phase. Microhardness profiles reveal correlation in hardness from the workpiece material transitioning to the chip. The tool wear (TiAIN + TiN coated solid carbide twist drill) and machining forces were investigated. Tool wear, was dominantly due to the adhesion process which developed from built-up edge formation, is highly detrimental to the flank face. Flute damage was also observed as a major issue in the drilling of duplex alloys leading to premature tool failure. Duplex 2507 shows higher sensitivity to cutting speed during machining and strain hardening at higher velocity and less machinability due to presence of higher percentage of Ni, Mo and Cr. |
| first_indexed | 2025-11-14T09:01:09Z |
| format | Journal Article |
| id | curtin-20.500.11937-39983 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:01:09Z |
| publishDate | 2015 |
| publisher | Springer |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-399832017-09-13T15:07:14Z Chip formation mechanism and machinability of wrought duplex stainless steel alloys Nomani, J. Pramanik, Alokesh Hilditch, T. Littlefair, G. Chip formation mechanism Duplex stainless steel Machinability This paper investigates the chip formation mechanism and machinability of two-phase materials, such as, wrought duplex stainless steel alloys SAF 2205 and SAF 2507. SEM and optical microscopic details of the frozen cutting zone and chips revealed that the harder austenite phase dissipates in the advancement of the cutting tool, being effectively squeezed out of the softer ferrite phase. Microhardness profiles reveal correlation in hardness from the workpiece material transitioning to the chip. The tool wear (TiAIN + TiN coated solid carbide twist drill) and machining forces were investigated. Tool wear, was dominantly due to the adhesion process which developed from built-up edge formation, is highly detrimental to the flank face. Flute damage was also observed as a major issue in the drilling of duplex alloys leading to premature tool failure. Duplex 2507 shows higher sensitivity to cutting speed during machining and strain hardening at higher velocity and less machinability due to presence of higher percentage of Ni, Mo and Cr. 2015 Journal Article http://hdl.handle.net/20.500.11937/39983 10.1007/s00170-015-7113-3 Springer restricted |
| spellingShingle | Chip formation mechanism Duplex stainless steel Machinability Nomani, J. Pramanik, Alokesh Hilditch, T. Littlefair, G. Chip formation mechanism and machinability of wrought duplex stainless steel alloys |
| title | Chip formation mechanism and machinability of wrought duplex stainless steel alloys |
| title_full | Chip formation mechanism and machinability of wrought duplex stainless steel alloys |
| title_fullStr | Chip formation mechanism and machinability of wrought duplex stainless steel alloys |
| title_full_unstemmed | Chip formation mechanism and machinability of wrought duplex stainless steel alloys |
| title_short | Chip formation mechanism and machinability of wrought duplex stainless steel alloys |
| title_sort | chip formation mechanism and machinability of wrought duplex stainless steel alloys |
| topic | Chip formation mechanism Duplex stainless steel Machinability |
| url | http://hdl.handle.net/20.500.11937/39983 |