An aluminum alloy designated 7085 developed by Alcoa is getting a foothold in tough aircraft and military applications.
The first application of 7085 was for large die forgings on the Airbus A380 wing spars. Higher zinc along with reduced copper and magnesium content give the aluminum alloy excellent strength and high fracture toughness. It’s used in the Boeing Dreamliner for wing spars and engine pylons. It’s also being evaluated for thick structural parts, such as blast shields, on military vehicles.
Engineers shifted from titanium to 7085 for large forgings that form the center section of the bulkhead of the multinational Joint Strike Fighter’s F-35B variant for the US Marines and Royal Navy. Reason: To save weight. Titanium is 60 percent more dense than the aluminum alloy.
Producing high-quality end-production metal parts with additive manufacturing for applications like aerospace and medical requires very tightly controlled processes and materials. New standards and guidelines for machines and processes, materials, and printed parts are underway from bodies such as ASTM International.
Although plastics make up only about 11% of all US municipal solid waste, many are actually more energy-dense than coal. Converting these non-recycled plastics into energy with existing technologies could reduce US coal consumption, as well as boost domestic energy reserves, says a new study.
This year's Dupont-sponsored WardsAuto survey of automotive designers and other engineers shows lightweighting dominates the discussion. But which materials will help them meet the 2025 CAFE standards are not entirely clear.
Artificially created metamaterials are already appearing in niche applications like electronics, communications, and defense, says a new report from Lux Research. How quickly they become mainstream depends on cost-effective manufacturing methods, which will include additive manufacturing.
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