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The Effect of Mn Content Solution-treatment Temperatures on Insoluble Phases in Al-Li-Cu-Mg-Mn-Zr Alloys
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1994, v.7 no.4, pp.517-526
Shin,
H., Ming,
H., Cho,
K., Chung,
Y., &
Shin,
M.
(1994). The Effect of Mn Content Solution-treatment Temperatures on Insoluble Phases in Al-Li-Cu-Mg-Mn-Zr Alloys. Analytical Science and Technology, 7(4), 517-526.
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Abstract
Large insoluble phases and dispersoids in Al-Li-Cu-Mg-Mn-Zr alloys containing Mn were analyzed with EPMA(Electron Probe Microanalyzer) and SAEM(Scanning Auger Electron Microscope). Morphology, distribution and volume fraction of the large insoluble phase were also analyzed quantitatively by optical microscopy. Mechanical properties were tested at room temperature and at <TEX>$200^{\circ}C$</TEX>. With increasing Mn contents, the volume fraction of the large insoluble phases increased steeply, thus decreasing ductility. Mn was found to be very effective for obtaing uniformly distributed fine-grain structures. The alloy containing 0.44 wt% Mn showed the highest tensile strength among Mn-bearing alloys tested.
- keywords
- Mn dispersoid, insoluble phase, <TEX>$Al_6$</TEX>(Fe, Mn)
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