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It is produced in many tempers, some of which are 7075-0, 7075-T6, 7075-T651. The first 7075 was developed in secret by a Japanese company, Sumitomo Metal , in 1935, [ 3 ] and eventually used for airframe production in the Imperial Japanese Navy . 7075 was reverse engineered by Alcoa in 1943, after examining a captured Japanese aircraft.
2.6-2.8 g/cm3 Melting point 494°C Tensile strength 515 MPa Yield strength 455 MPa Fatigue strength 240 MPa Elastic modulus 70-80 GPa Poisson's ratio 0.33
7068 alloy is a 7000 series aluminium-zinc alloy registered with the US Aluminium Association and produced to AMS 4331 (chemical composition and mechanical properties) and AMS 2772 (heat treatment). 7068 alloy ‘A’ and ‘B’ tensile data and fatigue properties have been ratified for inclusion in MIL Handbook 5 / MMPDS.
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The ZMC-2 airship, the first aircraft to use Alclad in its construction. Alclad is a corrosion-resistant aluminium sheet formed from high-purity aluminium surface layers metallurgically bonded (rolled onto) to high-strength aluminium alloy core material.
7075 may refer to: 7075 Sadovnichij, a main-belt asteroid discovered in 1979; 7075 aluminium alloy This page was last edited on 3 September 2020, at 19:09 (UTC) ...
That must have been a mistake. The linked article Extra super duralumin and successive aluminium alloys for aircraft states that in 1935 the 7075 was developed. - 1935-Nen (Shōwa 10-nen) tōji sudeni chō jurarumiso (Super Duralumin) gōkin wa kaihatsu sa rete itaga Wildkatzen 09:22, 23 May 2019 (UTC)
A Guinier–Preston zone, or GP-zone, is a fine-scale metallurgical phenomenon, involving early stage precipitation. [1] [2]GP-zones are associated with the phenomenon of age hardening, whereby room-temperature reactions continue to occur within a material through time, resulting in changing physical properties.