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Standard

Heat Treatment Martensitic Corrosion-Resistant Steel Parts

2020-09-29
CURRENT
AMS2759/5F
This specification, in conjunction with the general requirements for steel heat treatment covered in AMS2759, establishes the requirements for heat treatment of martensitic corrosion-resistant steel parts. Parts are defined in AMS2759. General ordering instructions are specified in AMS2759.
Standard

Measurement of the Total Ash Content of Aviation Piston Engine Oils by a Calculation Method

2020-09-29
WIP
J1787_202009
This SAE Recommended Practice describes an empirical method for determining the theoretical ash content of aviation piston engine lubricating oils by calculating the equivalent weight of metallic oxides formed at 775 °C based on the metallic elemental concentration. The calculation method of ash determination may be used as an alternate to ASTM D 482 for application to the standards for aviation piston engine lubricating oils.
Standard

High density ceramic media

2020-09-28
WIP
AMS2431/9
Specification to cover the technical requirements for a high density ceramic peening media.
Standard

Wire, Electrical, Stranded, Uninsulated Copper, Copper Alloy, or Aluminum, or Thermocouple Extension, General Specification for

2020-09-26
WIP
AS29606B

This specification covers concentric lay stranded and rope-lay stranded round electrical conductor fabricated from copper, copper alloy or aluminum. This specification also covers thermocouple extension conductor fabricated from nickel/chromium or nickel/aluminum/manganese. The conductors in this specification are suitable for use in insulated wires used in aerospace and other applications.

Standard

Studs, Corrosion and Heat Resistant Steel, UNS S66286 Tensile Strength 130 ksi 1800 °F Solution Heat Treated, Aged Before Roll Threading Procurement Specification

2020-09-25
WIP
AS7482C
This specification covers studs made from a corrosion and heat resistant, age hardenable iron base alloy of the type identified under the Unified Numbering System as UNS S66286. The following specification designations and their properties are covered: AS7482 130 ksi minimum ultimate tensile strength at room temperature 70 ksi stress-rupture strength at 1200 °F; AS 7482-1 130 ksi minimum ultimate tensile strength at room temperature 78 ksi minimum ultimate shear strength at room temperature; AS7482-2 130 ksi minimum ultimate tensile strength at room temperature.
Technical Paper

Methods to Control Curing Induced Distortion in Hybrid Joining of Dissimilar Metals

2020-09-25
2020-28-0401
In lightweight structures with dissimilar metal designs, structural adhesive joining is a potential joining method. Adhesives help in reducing galvanic corrosion by minimizing physical contact between two dissimilar metals. Along with adhesives, fasteners are often used as a secondary joining method to hold the assembly together during adhesive curing. Therefore, a hybrid joint which is a combination of adhesives and mechanical fasteners is potential joining method to join dissimilar metals. However, when two dissimilar metals such as aluminum to steel are joined with hybrid joint by adhesive curing at elevated temperature, the distortion of assembly is observed when cooled at room temperature. This is due to the mismatch between coefficients of thermal expansion of aluminum vs steel. The adhesive may also experience residual stress and fracture. In this study, adhesive curing induced distortion is studied using 1.1 meter long specimens of aluminum to steel hybrid joint assembly.
Technical Paper

Optimization of spinning key Parameters by using Taguchi based VIKOR and Anova approaches: A case study to manufacturing a cylindrical cup

2020-09-25
2020-28-0408
Metal spinning operation is one of the most seasoned techniques for chip less formation, the segments for the most part discover application in the airplane and rocket industry which requires a high strength to low weight ratio for their component. By utilizing these systems in the process outline, the time and material wasted by utilizing the experimentation could be decreased fundamentally. It additionally empowers parts to be created with both enhance mechanical properties of just about 3 times an incentive to the raw material condition, and also with high dimensional exactness's and surface completions. This examination introduces the enhancement of Metal Spinning process parameters on Al 6061 - T6 and with responses to get Minimum thinning (mm), Surface Roughness (µm) and Spinning Time (sec) and Maximum Hardness Supported orthogonal array with Grey relation analysis & ANOVA.
Technical Paper

Hot Corrosion Demeanour of Key-Hole Plasma Arc Welded Aerospace Grade Hastelloy X in Molten Salts Environment

2020-09-25
2020-28-0422
The current work investigates the hot corrosion demeanour of Hastelloy X weldment produced with autogenous mode through key-hole plasma arc welding (K-PAW). The hot corrosion test has been performed for weldment in molten salt-1 (MS-1) (75 % Na2SO4 + 25 % V2O5) and molten salt-2 (MS-2) (75 % Na2SO4 + 20 % V2O5 + 5 % NaCl) circumstance for 25 hrs (25 cycles) at 900 °C. The MS-1 substrate of both base metal and weldment provided the lowest weight gain than the MS-2 substrate. The NaCl in the MS-2 causes severe hot corrosion on the substrate, whereas the absence of NaCl in MS-1 reduces the hot corrosion effects. The highest parabolic constant is observed for K-PAW weldment in MS-2 condition. The tendency of hot corrosion rate follows the order of, Base Metal MS-1 < K-PAW MS-1 < Base Metal MS-2 < K-PAW MS-2. The occurrence of protective phases like chromium oxides (Cr2O3), spinel oxides (NiCr2O4 and NiFe2O4) Nickel oxide (NiO) on the substrate resist the further oxidation.
Standard

Heat Treatment of Parts in a Vacuum

2020-09-22
CURRENT
AMS2769D
This specification establishes the requirements and procedures for heat treating parts in vacuum/partial pressure and shall be used as a supplementary document to primary heat treating specifications as applicable.
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