This specification covers a titanium alloy in the form of bars up through 4.000 inches (101.60 mm) in nominal diameter or least distance between parallel sides, inclusive, forgings of thickness up through 4.000 inches (101.60 mm), inclusive, with bars and forgings having a maximum cross-sectional area of 32 square inches (204.46 cm2), and stock for forging of any size (see 8.6

AMS G Titanium and Refractory Metals Committee

Aluminum Alloy Sheet, 4.4Cu - 1.5Mg - 0.60Mn (2024; -T4 Flat Sheet), Solution Heat Treated, High Formability

AMS4297C (Current)

04/25/2024

This specification covers an aluminum alloy in the form of sheet 0.020 to 0.128 inch (0.51 to 3.25 mm), inclusive, in nominal thickness (see 8.5

AMS D Nonferrous Alloys Committee

Elastomer: Silicone Rubber (MQ/VMQ), General Purpose, 35 - 45 Durometer Type ‘A’ Hardness

AMS3301K (Current)

04/25/2024

This specification covers a silicone (MQ/VMQ) elastomer that can be used to manufacture product in the form of sheet, strip, tubing, extrusions, and molded shapes. This specification should not be used for molded rings, compression seals, molded O-ring cord, and molded-in-place gaskets for aeronautical and aerospace applications

AMS CE Elastomers Committee

Titanium Alloy Welding Wire, 5Al - 2.5Sn

AMS4953J (Current)

04/25/2024

This specification covers a titanium alloy in the form of welding wire (see 8.5

AMS G Titanium and Refractory Metals Committee

Aluminum Alloy, Plate (7160-T7651), 7.0Zn - 2.2Cu - 1.5Mg - 0.10Zr, Solution Heat Treated, Stress Relieved, and Overaged

AMS4378A (Current)

04/25/2024

This specification covers an aluminum alloy in the form of plate 1.000 to 6.000 inches (25.40 to 152.40 mm), inclusive, in nominal thickness (see 8.5

AMS D Nonferrous Alloys Committee

Aluminum Alloy, Sheet and Plate, 2.5Mg - 0.25Cr (5052-H32), Strain Hardened, Quarter-Hard, and Stabilized

AMS4016N (Current)

04/25/2024

This specification covers an aluminum alloy in the form of sheet and plate 0.017 to 2.000 inches (0.43 to 50.80 mm), inclusive, in nominal thickness (see 8.6

AMS D Nonferrous Alloys Committee

Sealing Compound, Integral Fuel Tanks and General Purpose, Intermittent Use to 360 °F (182 °C

AMS3276H (Current)

04/25/2024

This specification covers fuel-resistant polysulfide (T) sealing compounds supplied as a two-component system

AMS G9 Aerospace Sealing Committee

Aluminum Alloy, Extruded Profiles (2395-T84), 3.95Cu - 1.15Li - 0.3Ag - 0.5Mg - 0.1Zr, Solution Heat Treated, Stress Relieved by Stretching, and Aged

AMS4359A (Current)

04/25/2024

This specification covers an aluminum alloy in the form of extruded rods, bars, and profiles (shapes) 0.040 to 1.500 inches (1.02 to 38.10 mm), inclusive, in thickness, and produced with maximum cross-sectional area of 23.25 square inches (15000 mm2) and a maximum circumscribing circle diameter (circle size) of 15.5 inches (394 mm) (see 2.4.1 and 8.6

AMS D Nonferrous Alloys Committee

Path-Tracking Control for Four-Wheel Steer/Drive Agricultural Special Electric Vehicles Considering Stability

2024-01-5051

04/25/2024

With the modernization of agriculture, the application of unmanned agricultural special vehicles is becoming increasingly widespread, which helps to improve agricultural production efficiency and reduce labor. Vehicle path-tracking control is an important link in achieving intelligent driving of vehicles. This paper designs a controller that combines path tracking with vehicle lateral stability for four-wheel steer/drive agricultural special electric vehicles. First, based on a simplified three-degrees-of-freedom vehicle dynamics model, a model predictive control (MPC) controller is used to calculate the front and rear axle angles. Then, according to the Ackermann steering principle, the four-wheel independent angles are calculated using the front and rear axle angles to achieve tracking of the target trajectory. For vehicle lateral stability, the sliding mode control (SMC) is used to calculate the required direct yaw moment control (DYC) of the vehicle, and wheel torque distribution

Huang, Bin, Yang, Nuorong, Ma, Liutao, Wei, Lexia

Aluminum Alloy, Sheet and Plate, Alclad, 4.4Cu - 1.5Mg - 0.60Mn (Alclad 2024, -T861 Sheet and Plate), Solution Heat Treated, 6% Cold Worked and Artificially Aged

AMS4467C (Current)

04/25/2024

This specification covers an aluminum alloy in the form of alclad sheet and plate supplied in the -T861 temper

AMS D Nonferrous Alloys Committee

Aluminum Alloy, Coiled Sheet, Alclad, 4.4Cu - 1.5Mg - 0.60Mn (Alclad 2024; -T4 Coiled Sheet), Solution Heat Treated

AMS4475C (Current)

04/25/2024

This specification covers an aluminum alloy in the form of alclad coiled sheet from 0.010 to 0.128 inch (0.25 to 3.25 mm), inclusive, in thickness supplied in the -T4 temper (see 8.5

AMS D Nonferrous Alloys Committee

Tape for Organic Coatings Adhesion Testing

AMS3721A (Current)

04/25/2024

This specification establishes requirements for a tape that is used to perform organic coatings adhesion testing

AMS G8 Aerospace Organic Coatings Committee

Titanium Alloy Bars, Forgings, and Flash-Welded Rings, 5Al - 2.5V - 4Sn - 1Co - 0.8Fe Annealed

AMS6903 (Current)

04/25/2024

This specification covers a titanium alloy in the form of bars, forgings, and flash-welded rings up through 12.000 inches (304.80 mm), inclusive, in diameter or least distance between parallel sides, and stock of any size for forging or flash-welded rings. Bars, forgings, and flash-welded rings with a nominal thickness of 3.000 inches (79.20 mm) or greater shall have a maximum cross-sectional area of 113 square inches (729 cm2) (see 8.5

AMS G Titanium and Refractory Metals Committee

Castings, Classification and Inspection

AMS2175B (Current)

04/25/2024

This specification establishes nondestructive testing methods, sampling frequency, and acceptance criteria for the inspection of metal castings

AMS B Finishes Processes and Fluids Committee

Aluminum Alloy, Alclad Sheet 5.6Zn - 2.5Mg - 1.6Cu - 0.23Cr (Alclad 7075-O) Annealed, Fine Grained

AMS4278C (Current)

04/25/2024

This specification covers an aluminum alloy in the form of alclad sheet over 0.039 to 0.126 inches (0.99 to 3.20 mm), inclusive, in nominal thickness with a fine-grain core of ASTM No. 6 or finer (see 8.5

AMS D Nonferrous Alloys Committee

Investigation of Different Cathode Path Topologies for Water Recovery in a Heavy-Duty Polymer Electrolyte Membrane Fuel Cell Vehicle

2024-01-5050

04/25/2024

Heavy-duty vehicles equipped with polymer electrolyte membrane fuel cells (PEM-FC) are an environmentally friendly alternative to vehicles powered by internal combustion engines. A major challenge for heavy-duty fuel cell vehicles is the potential cooling deficit under high load conditions at high ambient temperatures. To solve this problem, a spray cooling system can be utilized, in which liquid water is sprayed on the main cooler at the front end of the vehicle. The evaporation of the sprayed liquid water results in an increased cooling power. In this paper, the recovery of liquid water within the cathode loop of a mobile PEM-FC system is presented and discussed. For this purpose, three different topologies of the cathode subsystem of the PEM-FC are investigated for recovering liquid water directly from the fuel cell exhaust gas. To obtain liquid water, vapor in the exhaust gas is cooled below the saturation temperature in an additional heat exchanger. Three possible positions of

Petersen, Niels, Wagenblast, Max, Pollak, Markus, Heinke, Steffen, Tegethoff, Wilhelm, Köhler, Jürgen

SAE TOMORROW TODAY: We Need More Engineers

1344904/24/2024

Each year, the U.S. needs roughly 400,000 new engineers. Projections estimate that nearly one-third of these roles will remain unfilled each year through at least 2030. What's worse? There's $450 billion of lost economic output at risk. To address this dire need, Boston Consulting Group (BCG) and SAE International are working together to find new and creative ways to close the gap. The 40 by 30 initiative aims to boost the number of women in engineering roles to 40% by 2030, and along the way, open up pathways for all individuals who are interested in training, upskilling, and shifting across engineering disciplines. To learn more, we sat down with SAE Board Member and Trustee, Joan Wills, Executive Director, Software & Electronics Engineering, Cummins Inc., and Sibley Nebergall (Lovett), Partner, BCG, to understand the challenges, the opportunities, and how a public-private partnership can strengthen the engineering talent pipeline. It's an eye-opening conversation you won't want to

Hineman, Marcie

Failure Analysis of Cryogenically Treated and Gas Nitrided Die Steel in Rotating Bending Fatigue

05-17-02-0014

04/24/2024

AISI H13 hot work tool steel is commonly used for applications such as hot forging and hot extrusion in mechanical working operations that face thermal and mechanical stress fluctuations, leading to premature failures. Cryogenic treatment was applied for AISI H13 steel to improve the surface hardness and thereby fatigue resistance. This work involves failure analysis of H13 steel specimens subjected to cryogenic treatment and gas nitriding. The specimens were heated to 1020°C, oil quenched followed by double tempering at 550°C for 2 h, and subsequently, deep cryogenically treated at −185°C in the cryochamber. Gas nitriding was carried out for 24 h at 500°C for 200 μm case depth in NH3 surroundings. The specimens were subjected to rotating bending fatigue at constant amplitude loading at room temperature. Measurement of surface roughness, hardness, and microstructural analysis indicated improved fatigue life for cryogenically treated specimens as compared to gas nitride, which could be

Shinde, Tarang, Mutalikdesai, Sachin, Jomde, Amit, Shamkuwar, Sonal

Machines and Measurements: Vol. 1

EPRCOMPV052023

04/24/2024

Muelaner, Jody, Webb, Philip

Advanced Manufacturing in Aerospace: Vol. 1

EPRCOMPV042023

04/24/2024

Hayes, Michael, Muelaner, Jody, Roye, Thorsten, Webb, Philip

Manufacturing and Industry 4.0: Vol. 1

EPRCOMPV06202304/24/2024

Muelaner, Jody, Roye, Thorsten

Plain Spherical Bearing Conformity Examination

ARP5448/6A (Current)

04/24/2024

This method outlines a standard procedure for performing conformity tests of bearings utilizing liners of bonded polytetrafluoroethylene (PTFE). The data from these tests shall be used to determine if the product meets the conformity requirements of the applicable specification

ACBG Plain Bearing Committee

Post-Treatment and Hybrid Techniques for Prolonging the Service Life of Fused Deposition Modeling Printed Automotive Parts: A Wear Strength Perspective

05-17-02-0015

04/24/2024

This study aims to explore the wear characteristics of fused deposition modeling (FDM) printed automotive parts and techniques to improve wear performance. The surface roughness of the parts printed from this widely used additive manufacturing technology requires more attention to reduce surface roughness further and subsequently the mechanical strength of the printed geometries. The main aspect of this study is to examine the effect of process parameters and annealing on the surface roughness and the wear rate of FDM printed acrylonitrile butadiene styrene (ABS) parts to diminish the issue mentioned above. American Society for Testing and Materials (ASTM) G99 specified test specimens were fabricated for the investigations. The parameters considered in this study were nozzle temperature, infill density, printing velocity, and top/bottom pattern. The hybrid tool, i.e., GA–ANN (genetic algorithm–artificial neural network) has been opted to train, predict, and optimize the surface

Narang, Rajan, Kaushik, Ashish, Dhingra, Ashwani Kumar, Chhabra, Deepak

Proposed Test Method for Brake Pad Lining Robustness in Cold Conditions

2024-01-5049

04/24/2024

With globalization, vehicles are sold across the world throughout different markets and their automotive brake systems must function across a range of environmental conditions. Currently, there is no current standardized test that analyzes brake pads’ robustness against severe cold and humid environmental conditions. The purpose of this proposed test method is to validate brake system performance under severe cold conditions, comparing the results with ambient conditions to evaluate varying lining materials’ functional robustness. The goal of this paper is to aid in setting a standardized process and procedure for the testing of automotive brakes’ environmental robustness. Seven candidate friction materials were selected for analysis. The friction materials are kept confidential. Design of experiment (DOE) techniques were used to create a full-factorial test plan that covered all combinations of parameters. The test script involves brake applications at 5, 10, 15, and 20 bar, at both

Passador, Stephen Daniel Austin, Boudreau, Douglas Barret, Capacchione, Christopher James

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