Metal treatment – Stock – Age or precipitation hardened or strengthened
Patent
1995-08-10
1998-06-02
Wyszomierski, George
Metal treatment
Stock
Age or precipitation hardened or strengthened
148416, 148417, 420533, 420541, 420542, 420543, C22C 2110, C22C 2112
Patent
active
057593027
ABSTRACT:
There is provided Al alloys which have improved and excellent fracture toughness and fatigue characteristic and improved formability, and which can be suitably used for transportation machines, such as aircraft, railway vehicles, general mechanical parts and the like. The Al alloy contains 1 to 8% (% by weight, the same is true for the following) of Cu, containing one or more selected from a group comprising 0.4 to 0.8% of Mn, 0.15 to 0.3% of Cr, 0.05 to 0.1% of Zr and 0.1 to 2.5% of Mg, Fe and Si each being less than 0.1%, a distance between constituents being more than 85 .mu.m, and having a micro-structure fulfilling at least one of the following (a) to (c):
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Eto Takehiko
Nakai Manabu
Kabushiki Kaisha Kobe Seiko Sho
Wyszomierski George
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