Spark Plasma Sintering of Fe-Ni-Cu-Mo-C Low Alloy Steel Powder
| Autor: | Sung Gye Park, Jin-Chun Kim, Minh-Thuyet Nguyen, Ho Yoon Kim, Won Joo Kim, Hong-Hai Nguyen |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Scanning electron microscope 020502 materials Alloy steel Metallurgy Alloy Spark plasma sintering 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Microstructure 0205 materials engineering Vickers hardness test engineering Grain boundary Pearlite 0210 nano-technology |
| Zdroj: | Journal of Korean Powder Metallurgy Institute. 23:207-212 |
| ISSN: | 2287-8173 1225-7591 |
| Popis: | In this study, Fe-Cu-Ni-Mo-C low alloy steel powder is consolidated by spark plasma sintering (SPS) process. The internal structure and the surface fracture behavior are studied using field-emission scanning electron microscopy and optical microscopy techniques. The bulk samples are polished and etched in order to observe the internal structure. The sample sintered at with holding time of 10 minutes achieves nearly full density of 98.9% while the density of the as-received conventionally sintered product is 90.3%. The fracture microstructures indicate that the sample prepared at by the SPS process is hard to break out because of the presence of both grain boundaries and internal particle fractures. Moreover, the lamellar pearlite structure is also observed in this sample. The samples sintered at 1000 and exhibit a large number of tiny particles and pores due to the melting of Cu and aggregation of the alloy elements during the SPS process. The highest hardness value of 296.52 HV is observed for the sample sintered at with holding time of 10 minutes. |
| Databáze: | OpenAIRE |
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