Characterization of Age Hardening in a 319 AL Alloy
| Autor: | J. E. Allison, W. T. Donlon, R. Jahn |
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| Rok vydání: | 1998 |
| Předmět: | |
| Zdroj: | Microscopy and Microanalysis. 4:514-515 |
| ISSN: | 1435-8115 1431-9276 |
| DOI: | 10.1017/s1431927600022698 |
| Popis: | 319 Al (7.2-7.7wt% Si, 3.3-3.7%Cu, 0.25-0.35%Mg, 0.4%max.Fe, 0.2-0.3%Mn, 0.25%max Zn, 0.25%max Ti) is utilized by the automotive industry for engine blocks and cylinder heads. Detailed understanding of the age hardening behavior of these types of alloys is important to optimize the processing of these components to yield the desired physical properties. Age hardening curves for temperatures between 100 and 305°C have been determined for a commercial grade 319 Al alloy having a dendrite arm spacing of 30(im. Samples for TEM were prepared by conventional grinding and dimpling followed by ion milling at 4keV at liquid nitrogen temperatures. The phases formed within the primary aluminum dendrites during age hardening were characterized by JEOL 2000FX and an OXFORD ISIS microanalysis system.Age hardening curves for Al-Cu alloys are characterized by multiple hardening stages as shown by Silcock, et al. Figure 1 shows an example of a 150°C age hardening curve for 319 Al. |
| Databáze: | OpenAIRE |
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