Title of article
Microstructure and mechanical properties of a 5754 aluminum alloy modified by Sc and Zr additions
Author/Authors
Fuller، نويسنده , , Christian B and Krause، نويسنده , , Albert R and Dunand، نويسنده , , David C and Seidman، نويسنده , , David N، نويسنده ,
Pages
9
From page
8
To page
16
Abstract
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 β-Al3Mg2, which contributed to poorer fatigue behavior and reduced ductility.
Keywords
Al–Sc–Zr alloys , Fatigue (materials) , mechanical properties , Aluminum alloys , Microstructural properties
Journal title
Astroparticle Physics
Record number
2060941
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