Microstructural Evolution during DPRM Process of Semisolid Ledeburitic D2 Tool Steel
Semisolid metal processing is a relatively new technology that offers several advantages over liquid processing and solid processing because of the unique behaviour and characteristic microstructure of metals in this state. With the aim of finding a minimum process chain for the manufacture of high-...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2013/828926 |
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| author | M. N. Mohammed M. Z. Omar J. Syarif Z. Sajuri M. S. Salleh K. S. Alhawari |
| author_facet | M. N. Mohammed M. Z. Omar J. Syarif Z. Sajuri M. S. Salleh K. S. Alhawari |
| author_sort | M. N. Mohammed |
| collection | DOAJ |
| description | Semisolid metal processing is a relatively new technology that offers several advantages over liquid processing and solid processing because of the unique behaviour and characteristic microstructure of metals in this state. With the aim of finding a minimum process chain for the manufacture of high-quality production at minimal cost for forming, the microstructural evolution of the ledeburitic AISI D2 tool steel in the semisolid state was studied experimentally. The potential of the direct partial remelting (DPRM) process for the production of AISI D2 with a uniform globular microstructure was revealed. The liquid fraction was determined using differential scanning calorimetry. The microstructures of the samples were investigated using an optical microscope and a scanning electron microscope equipped with an energy dispersive spectroscopy analyser, while X-ray phase analysis was performed to identify the phase evolution and the type of carbides. Mechanical characterisation was completed by hardness measurements. The typical microstructure after DPRM consists of metastable austenite which was located particularly in the globular grains (average grain size about 50 μm), while the remaining interspaces were filled by precipitated eutectic carbides on the grain boundaries and lamellar network. |
| format | Article |
| id | doaj-art-7ee476ec92f94e47ac2bfeb88594f3f4 |
| institution | Kabale University |
| issn | 1537-744X |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-7ee476ec92f94e47ac2bfeb88594f3f42025-02-03T05:59:40ZengWileyThe Scientific World Journal1537-744X2013-01-01201310.1155/2013/828926828926Microstructural Evolution during DPRM Process of Semisolid Ledeburitic D2 Tool SteelM. N. Mohammed0M. Z. Omar1J. Syarif2Z. Sajuri3M. S. Salleh4K. S. Alhawari5Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Selangor, MalaysiaDepartment of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Selangor, MalaysiaDepartment of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Selangor, MalaysiaDepartment of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Selangor, MalaysiaDepartment of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Selangor, MalaysiaDepartment of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Selangor, MalaysiaSemisolid metal processing is a relatively new technology that offers several advantages over liquid processing and solid processing because of the unique behaviour and characteristic microstructure of metals in this state. With the aim of finding a minimum process chain for the manufacture of high-quality production at minimal cost for forming, the microstructural evolution of the ledeburitic AISI D2 tool steel in the semisolid state was studied experimentally. The potential of the direct partial remelting (DPRM) process for the production of AISI D2 with a uniform globular microstructure was revealed. The liquid fraction was determined using differential scanning calorimetry. The microstructures of the samples were investigated using an optical microscope and a scanning electron microscope equipped with an energy dispersive spectroscopy analyser, while X-ray phase analysis was performed to identify the phase evolution and the type of carbides. Mechanical characterisation was completed by hardness measurements. The typical microstructure after DPRM consists of metastable austenite which was located particularly in the globular grains (average grain size about 50 μm), while the remaining interspaces were filled by precipitated eutectic carbides on the grain boundaries and lamellar network.http://dx.doi.org/10.1155/2013/828926 |
| spellingShingle | M. N. Mohammed M. Z. Omar J. Syarif Z. Sajuri M. S. Salleh K. S. Alhawari Microstructural Evolution during DPRM Process of Semisolid Ledeburitic D2 Tool Steel The Scientific World Journal |
| title | Microstructural Evolution during DPRM Process of Semisolid Ledeburitic D2 Tool Steel |
| title_full | Microstructural Evolution during DPRM Process of Semisolid Ledeburitic D2 Tool Steel |
| title_fullStr | Microstructural Evolution during DPRM Process of Semisolid Ledeburitic D2 Tool Steel |
| title_full_unstemmed | Microstructural Evolution during DPRM Process of Semisolid Ledeburitic D2 Tool Steel |
| title_short | Microstructural Evolution during DPRM Process of Semisolid Ledeburitic D2 Tool Steel |
| title_sort | microstructural evolution during dprm process of semisolid ledeburitic d2 tool steel |
| url | http://dx.doi.org/10.1155/2013/828926 |
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