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Steel, Bars, and Forgings 3.5Cr - 9.5Ni - 18Co - 1.1Mo (0.13 - 0.17C) Double Vacuum Melted, Normalized, Annealed

AMS E Carbon and Low Alloy Steels Committee
  • Aerospace Material Specification
  • AMS6517B
  • Current
Published 2019-10-10 by SAE International in United States
This specification covers a premium aircraft-quality alloy steel in the form of bars, forgings, and forging stock.
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Investigation of Silver-Plated Conductor Corrosion (Red Plague)

AE-8D Wire and Cable Committee
  • Aerospace Standard
  • AIR4487B
  • Current
Published 2019-10-02 by SAE International in United States
This SAE Aerospace Information Report (AIR) shall be limited to information about a specific corrosion mechanism of silver-plated conductors that produces cuprous/cupric oxide deposits (Red Plague). It examines some possible causes and some recommendations to minimize the possibility of its occurrence. It also provides a number of reference documents that describe the corrosion in detail, methods to determine conductor damage, methods to produce the corrosion, and other investigative reports of this phenomena and their conclusions.
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Invisible Tags Write, Read, and Erase Using Light

  • Magazine Article
  • TBMG-35269
Published 2019-10-01 by Tech Briefs Media Group in United States

A method was developed that enables information to be contained in simple plastic foils with a thickness of less than 50 μm, which is thinner than a human hair. Organic luminescent molecules are introduced into the transparent plastic foils. In the beginning, these molecules are in an inactive, dark state; by locally using ultraviolet irradiation, it is possible to turn this dark state into an active, luminescent one.

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Development of a Dedicated CNG Three-Way Catalyst Model in 1-D Simulation Platforms

FPT Industrial SpA-Stefano Golini, Francesco Giovanni Rutigliano
Istituto Motori CNR-Carlo Beatrice, Valentina Fraioli
Published 2019-09-09 by SAE International in United States
A growing interest towards heavy-duty engines powered with NG, dictated by stringent regulations in terms of emissions, has made it essential to study a specific Three-Way Catalyst (TWC). Oxygen storage phenomena characterize the catalytic converter efficiency under real world driving operating conditions and, consequently, during strong dynamics in Air-to-Fuel ratio (AFR).A numerical “quasi-steady” model has been set-up to simulate the chemical process inside the reactor. A dedicated experimental campaign has been performed in order to evaluate the catalyst response to a defined λ variation, thus providing the data necessary for the numerical model validation. In fact, goal of the present research activity was to investigate the effect of very fast composition transitions of the engine exhaust typical of the mentioned driving conditions (including fuel cutoffs etc.) on the catalyst performance and on related emissions.A surface reactions kinetic mechanism, representing CH4, CO, H2 oxidation and NO reduction, has been appropriately calibrated in steady-state operation, using a step-by-step procedure all over the engine operating conditions at different AFRs. Then transient conditions were numerically reproduced, through cyclical and…
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Visualizing Motion of Water Molecules for Liquid-Based Electronics

  • Magazine Article
  • TBMG-34892
Published 2019-08-01 by Tech Briefs Media Group in United States

A high-resolution inelastic x-ray scattering technique was used to measure the strong bond involving a hydrogen atom sandwiched between two oxygen atoms. This hydrogen bond is a quantum-mechanical phenomenon responsible for various properties of water, including viscosity, that determine a liquid's resistance to flow or to change shape.

Endovascular Variable Aortic Control Catheter

  • Magazine Article
  • TBMG-34900
Published 2019-08-01 by Tech Briefs Media Group in United States

The Air Force has developed improved devices for hemostatic management of patients with life-threatening blood loss from an arterial wound or surgery. Current aortic occlusion devices successfully stem aortic blood loss, but result in hypoxia below the occlusion device. These devices, by blocking blood flow and oxygen delivery, severely limit the amount of time that such resuscitative measures can be taken before other medical complications arise.

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Steel, Corrosion-Resistant, Bars, and Forgings 10Cr - 5.5Ni - 14Co - 2Mo - 1W (0.19-0.23C) Vacuum Induction Melted, Vacuum Arc Remelted, Normalized, Annealed

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS5922C
  • Current
Published 2019-07-24 by SAE International in United States
This specification covers a corrosion-resistant, premium aircraft-quality alloy steel in the form of bars, forgings, and stock for forging.
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Graphene Coating Takes Oxygen Out of Lithium Battery Fires

  • Magazine Article
  • TBMG-34601
Published 2019-06-01 by Tech Briefs Media Group in United States

Lithium batteries allow electric vehicles to travel several hundred miles on one charge. Their capacity for energy storage is well known — so is their tendency to occasionally catch on fire. This “thermal runaway” occurs most frequently when the batteries overheat or cycle rapidly.

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Titanium Alloy, Forgings 10V - 2Fe - 3Al Consumable Electrode Melted, Single-Step Solution Heat Treated and Aged 180 ksi (1241 MPa) Tensile Strength

AMS G Titanium and Refractory Metals Committee
  • Aerospace Material Specification
  • AMS4983G
  • Current
Published 2019-05-28 by SAE International in United States
This specification covers a titanium alloy in the form of forgings 1.00 inch (25.4 mm) and under in nominal cross-sectional thickness and of forging stock of any size.
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Titanium Alloy Forgings 10V - 2Fe - 3Al Consumable Electrode Melted, Solution Heat Treated and Aged 173 ksi (1193 MPa) Tensile Strength

AMS G Titanium and Refractory Metals Committee
  • Aerospace Material Specification
  • AMS4984G
  • Current
Published 2019-05-28 by SAE International in United States
This specification covers a titanium alloy in the form of forgings 3.000 inches (76.20 mm) and under in nominal cross-sectional thickness and of stock for forging of any size.
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