Microstructural evolution of a forged 2XXX series aluminum powder metallurgy alloy
| Autor: | Rich L. Hexemer, Taylor Alan C, G.A. Sweet, Babak Shalchi Amirkhiz, Donald Paul Bishop, Ian W. Donaldson, Bruce W. Williams |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Microstructural evolution Materials science Mechanical Engineering Metallurgy Alloy chemistry.chemical_element 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Forging chemistry Mechanics of Materials Aluminium Powder metallurgy 0103 physical sciences Ultimate tensile strength engineering Particle General Materials Science Crystallite 0210 nano-technology |
| Zdroj: | Materials Characterization. 151:342-350 |
| ISSN: | 1044-5803 |
| Popis: | The microstructural response to hot upset forging was studied for a commercially relevant 2000-series aluminum powder metallurgy alloy. Sufficiently large specimens were produced such that the tensile property development was recorded for true compressive forging strains 0 mm/mm to 1.55 mm/mm. Full theoretical density values were obtained and up to a four-fold improvement in tensile ductility was observed. The tensile strength of a sintered-T6 component was measured at 357 MPa, while forging to 1.40 mm/mm increased that to 418 MPa. Microstructural reinforcement was found to be predominantly S-phase precipitates. Prior particle boundaries (PPB) of an unforged specimen were found to be continuously decorated with MgO and Mg2Sn crystallites. Such boundaries in hot forged specimen were discretized into clusters, producing regions of PPB devoid of oxides or other secondary phases. Improvements to mechanical properties were largely attributed to this effect. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect