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CRYOGENIC PROPERTIES OF 2014T6 AND A-286. PHASE II
BELL AEROSYSTEMS CO BUFFALO N Y
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Tensile properties of A-286 and 2014T6 were obtained at room temperature, at -110 F methylene chloride and dry ice, and at -320 F liquid N. A-286 is a corrosion and heat resistant AUSTENITIC ALLOY. It develops optimum properties by means of a solution heat treatment followed by a precipitation or aging treatment. In the solution heat treated condition the alloy is extremely soft and ductile and may be cold drawn and formed very readily. The Al alloy 2014T6 is a high strength alloy and is of the Al-Cu-MgSi type employing CuAl2 as the primary precipitation-hardening agent. A secondary precipitation hardener, CuMg5-Si4Al4, greatly increases the strengths obtainable through artificial aging and is also responsible for the natural aging characteristics of this alloy. Mn is added to prevent formation of an undesirable Al-Cu-Fe-Si constituent and acts, to some extent, as a grain refiner. Ti is allowed in limited amounts for its grain refining action. Fe, Cr and Zn are usually present as undesirable impurities. Author
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