FYI: Mil Spec Al 7175 T74

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10 years 9 months ago #35757 by OleCowboy
FYI: Mil Spec Al 7175 T74 was created by OleCowboy
Every wondered about your AR10 upper????

FATIGUE PROPERTIES OF 7175 ALUMINIUM ALLOY HAND FORGINGS
Vladivoj Očenášek
SVÚM a.s., Podnikatelská 565, 190 11 Praha 9 – Běchovice, Czech Republic, ocenasek@svum.cz
Abstract
Al 7175 alloy is one of the high strength heat treatable aluminium alloys. Forgings used in severe operational conditions, especially in aviation, are made of it. Their mechanical and fracture properties are excellent as well as the corrosion resistance in tempers T74 and/or T7452. The content of impurities Fe and Si is controlled and contributes substantially to a very good fatigue resistance. The level and scatter of fatigue properties depend not only on the chemical composition and heat treatment, but also on the forming way and the extent of deformation. In the case of die forgings, which are forged usually from extruded rods, the extent of deformation of as cast structure is high and the fatigue properties do not depend markedly on it. The present paper deals with the effect of deformation on fatigue properties of hand forgings that are produced from cast and homogenized billets. In this case, the amount and way of deformation can influence substantially the fatigue properties and their anisotropy as well.

www.comat.cz/files/proceedings/11/reports/1292.pdf

7175 is a high strength, heat treatable, forging alloy. It has an excellent combination of toughness and strength, similar to 7075 alloy except that the 7175 version has superior toughness and tensile strength.

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