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Study on Effect of Laser Peening on Inconel 718 produced by DMLS technique

Vellore Institute of Technology-Nattudurai Navin Kumar, Aditya Chandrakant Yadav, Kumar Raja, Subramanian Prabhakaran, Chooriyaparambil Damodaran Naiju, Sivaperuman Kalainathan
  • Technical Paper
  • 2019-28-0146
To be published on 2019-10-11 by SAE International in United States
In Additive manufacturing, Direct Metal Laser Sintering is a rapid manufacturing technique used for manufacturing of functional components. Finely pulverized metal is melted using a high-energy fibre laser, by Island principle strategy produces mechanically and thermally stable metallic components with reduced thermal gradients, stresses & at high precision. Inconel is an austenitic chromium nickel based super alloy often used in the applications which require high strength & temperature resistant. It can retain its properties at high temperature, e.g. Engine components in aerospace, exhaust system in automobile applications etc. Here we attempts to analyze the effect of laser shock peening on DMLS Inconel 718 sample. Microstructure shows elliptical shaped structure and formation of new grain boundaries. Surface roughness of the material has been increased due to effect of laser shock pulse & ablative nature. 13 % Increase in macro hardness on the surface. Depth wise micro hardness was investigated, found to be 17% increase on the sub layer of the material due to the effect of hardened matrix formed by precipitation hardening and grain size refinement…
 

Effect of Cryogenic Treatment on Inconel 718 Produced by DMLS Technique

Vellore Institute of Technology-Chooriyaparambil Damodaran Naiju, Kumar Raja, Nattudurai Navin Kumar, Chandrakant Yadav Aditya, Muniappan Senthil Kumar
  • Technical Paper
  • 2019-28-0140
To be published on 2019-10-11 by SAE International in United States
The main purpose of this study is to investigate additive manufactured Inconel super alloy subjected to Cryogenic Treatment (CT). Cryogenic treatment mainly used in aerospace, defence and automobile application. Direct Metal Laser Sintering is an Additive manufacturing technique used for manufacturing of Complex and complicated functional components. Inconel is an austenitic chromium nickel based super alloy often used in the applications which require high strength & temperature resistant. In this work, we have made an attempt to study microstructure and mechanical properties of additive manufactured Inconel 718 when subjected to cryogenic treatment at three different time intervals. The micro-structural evolution of IN718 super-alloy before and after CT was investigated by both Optic Microscope (OM) and SEM. Surface roughness and hardness at different CT time intervals has also analyzed. Additionally, XRD technique was used to analyze the surface residual stress. The result shows after three cycles of CT-1(CT-2, CT-3), the hardness of Inconel 718 has been substantially improved at room temperature. Microstructure shows grains in CT-3 condition larger number of refined and uniformly distributed strengthening precipitates…
 

Surface modification of Aluminium alloy 5083 reinforced with Cr2O3/TiO2 by friction stir process

Bannari Amman Institute of Technology-Dinesh Dhanabalan
Vellore Institute of Technology-Adarsh Singh, Govindasamy Rajamurugan, Prabu Krishnasamy
  • Technical Paper
  • 2019-28-0179
To be published on 2019-10-11 by SAE International in United States
Surface properties have vital role in overall performance of parts like brake shoe pad. The mechanical and residual stress measurements of aluminium alloy 5083 were investigated on friction stir processed plates using reinforcements of chromium oxide (Cr2O3) and Titanium di oxide (TiO2) separately as well as combination of these powders. A comparative analysis was performed to study the effects of reinforcements and tool type (cylindrical and threaded) keeping the FSP parameters and volume fraction of reinforcements as constant. This investigation shows that there was a significant increase in surface hardness (118 HRC) as well as decrease in residual stress compare to the base metal. This study also reveals that the threaded tool with a reinforcement of Cr2O3 and TiO2 reflected better mechanical properties than the cylindrical tool. The SEM image shows that the even distributions of reinforcement particles are presence in the processed zone. Mechanical properties like surface roughness, surface hardness and residual stress of samples were investigated. The significant improvement in the surface plates can be used in brake pad in automobile industries.
 
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Inspection of Ground, Chromium, Plated Steel Parts

AMS B Finishes Processes and Fluids Committee
  • Aerospace Material Specification
  • AMS2440C
  • Current
Published 2019-07-18 by SAE International in United States

This specification covers the requirements for inspection of ground chromium plated surfaces for grinder-induced damage to the chromium plate and substructure. The specification also provides users with criteria for distinguishing between such damage and acceptable indications inherent to the chromium plate.

 

Steel, Carburizing Grade, Bars, Forgings, and Tubing 1.2Cr - 3.2Ni - 0.12Mo (0.14 - 0.20C) (9317)

AMS E Carbon and Low Alloy Steels Committee
  • Aerospace Material Specification
  • AMS6264M
  • Current
Published 2019-06-17 by SAE International in United States
This specification covers an aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.
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Aluminum Alloy, Plate 3.5Cu - 1.0Li - 0.40Mg - 0.35Mn - 0.45Ag - 0.12Zr (2050-T84) Solution Heat Treated, Stress Relieved, and Artificially Aged

AMS D Nonferrous Alloys Committee
  • Aerospace Material Specification
  • AMS4413B
  • Current
Published 2019-05-10 by SAE International in United States
This specification covers an aluminum-lithium alloy in the form of plate 0.500 to 6.500 inch (12.70 to 165.10 mm) inclusive, in thickness (see 8.5).
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Steel, Welding Wire 0.78Cr - 1.8Ni - 0.35Mo - 0.20V (0.33 - 0.38C)(4335 Mod) Vacuum Melted, Environment Controlled Packaging

AMS E Carbon and Low Alloy Steels Committee
  • Aerospace Material Specification
  • AMS5029E
  • Current
Published 2019-04-02 by SAE International in United States
This specification covers a low-alloy steel in the form of welding wire.
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CRIMPING TOOL AND ACCESSORIES, DIES, WIRE SIZE 8 TO 0000 UN-INSULATED AND INSULATED CRIMP BARRELS

AE-8C2 Terminating Devices and Tooling Committee
  • Aerospace Standard
  • AS5259/7B
  • Current
Published 2019-03-15 by SAE International in United States
No Abstract Available.
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Friction Coefficient Identification and Environmental Marking System for Brake Linings

Brake Linings Standards Committee
  • Ground Vehicle Standard
  • J866_201903
  • Current
Published 2019-03-11 by SAE International in United States
This SAE Recommended Practice is intended to provide a uniform means of identification which may be used to classify the friction coefficient of brake linings, based on data obtained from tests conducted in accordance with SAE J661 Brake Lining Quality Test Procedure and SAE J2975 Measurement of Copper and other elements in Brake Friction Materials. NOTE: It is emphasized that this document does not establish friction requirements for brake linings, nor does it designate significant characteristics of brake linings which must be considered in overall brake performance. Due to other factors that include brake system design and operating environment, the friction codes obtained from this document cannot reliably be used to predict brake system performance.
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CRIMPING TOOL AND ACCESSORIES, INSPECTION GAGES, FOR AS5259 DIES

AE-8C2 Terminating Devices and Tooling Committee
  • Aerospace Standard
  • AS5259/6B
  • Current
Published 2019-03-08 by SAE International in United States
No Abstract Available.
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