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Fuller, Christian B.; Krause, Albert R.; Dunand, David C.; Seidman, David N. |
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Publication |
Microstructure and Mechanical Properties of a 5754 Aluminum Alloy Modified by Sc and Zr Additions |
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Journal Article |
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2002 |
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Abstract |
Materials Science and Engineering A |
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Corporate Author |
Mater. Sci. Eng. A |
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338 |
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1-2 |
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Summary Language |
8-16 |
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Al-Sc-Zr alloys; Fatigue (materials); Mechanical properties; Aluminum alloys; Microstructural properties |
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Abbreviated Series Title |
The effects of various heat treatments upon the microstructure and mechanical properties of a rolled 5754 aluminum alloy modified with 0.23 wt.% Sc and 0.22 wt.% Zr were investigated. Grain size, as well as precipitate size, type, and morphology were observed by optical and transmission electron microscopies. Two populations of the Al3Sc1-xZrx phase were present: (i) large incoherent precipitates formed during solidification and hot-rolling; and (ii) fine coherent precipitates formed from secondary precipitation, which improved alloy strength, as shown by hardness, tensile, and fatigue measurements. Aging, however, also produced two types of grain-boundary precipitates, Al6Mn and -Al3Mg2, which contributed to poorer fatigue behavior and reduced ductility. |
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NU @ karnesky @ |
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526 |
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