Spray Forming of Bulk Ultrafine-Grained Al-Fe-Cr-Ti
An Al-2.7Fe-1.9Cr-1.8Ti alloy has been spray formed in bulk and the microstructure and properties compared with those of similar alloys produced by casting, powder aomization (PA), and mechanical alloying (MA) routes. In PA and MA routes, a nanoscale metastable icosahedral phase is usually formed an...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
2010
|
| _version_ | 1826278409517400064 |
|---|---|
| author | Banjongprasert, C Hogg, S Liotti, E Kirk, C Thompson, S Mi, J Grant, P |
| author_facet | Banjongprasert, C Hogg, S Liotti, E Kirk, C Thompson, S Mi, J Grant, P |
| author_sort | Banjongprasert, C |
| collection | OXFORD |
| description | An Al-2.7Fe-1.9Cr-1.8Ti alloy has been spray formed in bulk and the microstructure and properties compared with those of similar alloys produced by casting, powder aomization (PA), and mechanical alloying (MA) routes. In PA and MA routes, a nanoscale metastable icosahedral phase is usually formed and is known to confer high tensile strength. Unlike previous studies of the spray forming of similar Al-based metastable phase containing alloys that were restricted to small billets with high porosity, standard spray forming conditions were used here to produce a ∼98 pct dense 19-kg billet that was hot isostatically pressed ("HIPed"), forged, and/or extruded. The microstructure has been investigated at all stages of processing using scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and synchrotron X-ray diffraction (XRD) at the Diamond Light Source. Consistent with the relatively low cooling rate in spray forming under standard conditions, the microstructure showed no compelling evidence for the formation of metastable icosahedral phases. Nonetheless, after downstream processing, the spray-formed mechanical properties as a function of temperature were very similar to both PA rapid solidification (RS) materials and those made by MA. These aspects have been rationalized in terms of the typical phases, defects, and residual strains produced in each process route. © 2010 The Minerals, Metals and Materials Society and ASM International. |
| first_indexed | 2024-03-06T23:43:30Z |
| format | Journal article |
| id | oxford-uuid:702029eb-3f5a-47dc-9163-7e03301832fe |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:43:30Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:702029eb-3f5a-47dc-9163-7e03301832fe2022-03-26T19:35:05ZSpray Forming of Bulk Ultrafine-Grained Al-Fe-Cr-TiJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:702029eb-3f5a-47dc-9163-7e03301832feEnglishSymplectic Elements at Oxford2010Banjongprasert, CHogg, SLiotti, EKirk, CThompson, SMi, JGrant, PAn Al-2.7Fe-1.9Cr-1.8Ti alloy has been spray formed in bulk and the microstructure and properties compared with those of similar alloys produced by casting, powder aomization (PA), and mechanical alloying (MA) routes. In PA and MA routes, a nanoscale metastable icosahedral phase is usually formed and is known to confer high tensile strength. Unlike previous studies of the spray forming of similar Al-based metastable phase containing alloys that were restricted to small billets with high porosity, standard spray forming conditions were used here to produce a ∼98 pct dense 19-kg billet that was hot isostatically pressed ("HIPed"), forged, and/or extruded. The microstructure has been investigated at all stages of processing using scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and synchrotron X-ray diffraction (XRD) at the Diamond Light Source. Consistent with the relatively low cooling rate in spray forming under standard conditions, the microstructure showed no compelling evidence for the formation of metastable icosahedral phases. Nonetheless, after downstream processing, the spray-formed mechanical properties as a function of temperature were very similar to both PA rapid solidification (RS) materials and those made by MA. These aspects have been rationalized in terms of the typical phases, defects, and residual strains produced in each process route. © 2010 The Minerals, Metals and Materials Society and ASM International. |
| spellingShingle | Banjongprasert, C Hogg, S Liotti, E Kirk, C Thompson, S Mi, J Grant, P Spray Forming of Bulk Ultrafine-Grained Al-Fe-Cr-Ti |
| title | Spray Forming of Bulk Ultrafine-Grained Al-Fe-Cr-Ti |
| title_full | Spray Forming of Bulk Ultrafine-Grained Al-Fe-Cr-Ti |
| title_fullStr | Spray Forming of Bulk Ultrafine-Grained Al-Fe-Cr-Ti |
| title_full_unstemmed | Spray Forming of Bulk Ultrafine-Grained Al-Fe-Cr-Ti |
| title_short | Spray Forming of Bulk Ultrafine-Grained Al-Fe-Cr-Ti |
| title_sort | spray forming of bulk ultrafine grained al fe cr ti |
| work_keys_str_mv | AT banjongprasertc sprayformingofbulkultrafinegrainedalfecrti AT hoggs sprayformingofbulkultrafinegrainedalfecrti AT liottie sprayformingofbulkultrafinegrainedalfecrti AT kirkc sprayformingofbulkultrafinegrainedalfecrti AT thompsons sprayformingofbulkultrafinegrainedalfecrti AT mij sprayformingofbulkultrafinegrainedalfecrti AT grantp sprayformingofbulkultrafinegrainedalfecrti |