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A cutting-edge technology to increase the friction coefficient in bolted joints in a simple way

3M do Brasil-Vanessa de Souza Valério, Rosana Emi Tamagawa, Kellen Cristina Busiol, Petrus Lencioni Filho
  • Technical Paper
  • 2019-36-0236
Published 2020-01-13 by SAE International in United States
Lightweight vehicles are one of the most efficient solutions to reduce the fuel consumption and the emission of polluting gases, which leads the automotive industry to the constant need to manufacture ever lighter vehicles. Due to these current requirements, there is a general move toward compact and lightweight powertrain system designs. Although more compact, these systems must be able to transmit the same or even higher forces and torques. Dealing with these contradictory requirements adding to the constant request to minimize production and assembly costs is a huge challenge to engineers. One approach is to enhance the coefficient of static friction in friction joints. When friction joints are designed, physical parameters such as overall size and surface pressure usually can only be varied in a tight window. Load transmission capability in friction joints is thus limited by the friction coefficient of the mating materials. An efficient solution for these limitations is to apply a nickel diamond coating either to the actual parts of the joints or to friction shims for installation in the joint. In…
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ACCESSORY, F ADAPTER, ROTATABLE, CONNECTOR, ELECTRICAL, CIRCULAR, HIGH DENSITY, QUICK DISCONNECT, ENVIRONMENT RESISTING, TYPE 1, (SERIES 1 OR 2)

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS81511/13
  • Current
Published 2019-12-26 by SAE International in United States
No Abstract Available.
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ACCESSORY, DUMMY STOWAGE RECEPTACLE, CONNECTOR, ELECTRICAL, CIRCULAR, HIGH DENSITY, QUICK DISCONNECT, ENVIRONMENT RESISTING (FOR SERIES 2 CONNECTORS)

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS81511/19
  • Current
Published 2019-12-26 by SAE International in United States
No Abstract Available.
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Influence of cutting fluid on reliability of threaded fastener joints

Atlas Copco Industrial Technique AB, Sickla Industrial 19, 1-Erik Persson
System and Component Design, Department of Machine Design, K-Mayank Kumar, Sergei Glavatskih
  • Technical Paper
  • 2019-01-2300
Published 2019-12-19 by SAE International in United States
This study reports on the effect of cutting fluids on friction behavior of the threaded fasteners. Underhead and thread friction are measured during tightening process of the hex-head threaded fasteners coated with different zinc-based coatings: electroplated zinc, zinc flake, and electroplated zinc nickel, commonly used in the automotive industry. The tests and data analysis are conducted considering ISO 16047 as a baseline. Test conditions are set close to the actual production conditions found in the motor vehicle industry. Water-based and ester-based cutting fluids are selected to unveil their impact on the reliability of the threaded fastener joints. It is shown that a change in the underhead interface conditions from dry to lubricated drastically reduces friction for the electroplated zinc and zinc nickel coatings.
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Nickel-Iron Alloy, Corrosion and Heat-Resistant, Welding Wire 12.5Cr - 42.5Ni - 6.0Mo - 2.7Ti - 0.015B - 35Fe

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS5830C
  • Current
Published 2019-11-12 by SAE International in United States
This specification covers a corrosion and heat-resistant nickel-iron alloy in the form of welding wire.
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Trace Element Control Nickel Alloy Castings

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS2280D
  • Current
Published 2019-11-05 by SAE International in United States
This specification establishes testing methods and maximum permissible limits for trace elements in nickel alloy castings.
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Tolerances Nickel, Nickel Alloy, and Cobalt Alloy Sheet, Strip, and Plate

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS2262H
  • Current
Published 2019-11-05 by SAE International in United States
This specification covers established manufacturing tolerances applicable to sheet, strip, and plate of nickel, nickel alloys, and cobalt alloys ordered to inch/pound dimensions. These tolerances apply to all conditions, unless otherwise noted. The term "excl" is used to apply only to the higher figure of a specified range.
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Experimental Study on Tool Wear and Cutting Temperature during Machining of Nimonic C-263 and Waspaloy Based on Taguchi Method and Response Surface Methodology

Sri Sairam Engineering College-Vetri Velmurugan Kannan
Vellore Institute of Technology-Venkatesan Kannan, Devendiran Sundararajan
Published 2019-10-11 by SAE International in United States
Nickel based materials of Nimonic C-263 and Waspaloy are used nowadays for aerospace applications owing to its superior strength properties that are maintained at a higher temperature. Tool wear and cutting temperature in the vicinity of cutting edge are two essential machinability characteristics for any cutting tool. In this regard, this study is pursued to examine the influence of factors on measuring of tool wear (Vba) and cutting temperature (Ts) during dry machining of two alloys studied experimentally based on Taguchi method and response surface methodology. Taguchi’s L16 orthogonal array is used to design the experiment and a PVD (TiAlN), CVD (TiN/Al2O3/TiCN) coated carbide inserts are used on turning of two alloys. The factor effect on output responses are studied using analysis of variance, empirical models, and responses surface 3D plots. To minimize the response and to convert into one single optimum level, responses surface desirability function approach is applied. The results show that progress of flank wear associated with Waspaloy is faster that of Nimonic C-263 due to high cutting temperature for Waspaloy that…
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Corrosion and Corrosive Wear of Steel for Automotive Exhaust Application

Crescent Institute of Science and Technology-Tiruvannamalai Rajendra Prasad Tamilarasan
SRM Institute of Science and Technology-Raj Rajendran
Published 2019-10-11 by SAE International in United States
In the current scenario, durable exhaust system design, development and manufacturing are mandatory for the vehicle to be competitive and challenging in the automotive market. Material selection for the exhaust system plays a major role due to the increased warranty requirements and regulatory compliances. The materials used in the automotive exhaust application are cast iron, stainless steel, mild steel. The materials of the exhaust systems should be heat resistant, wear and corrosion resistant. Stainless steel is the most commonly used material in the automotive exhaust system. Due to increasing cost of nickel and some other alloying elements, there is a need to replace the stainless steel with EN 8 steel. Recent trends are towards light weight concepts, cost reduction and better performance. In order to reduce the cost and to achieve better wear and corrosion resistance, the surface of the EN 8 steel is modified with coatings. This work focuses on the evaluation of corrosion and corrosive wear resistance of hard chrome plating (HCP), hot dip aluminized coatings (HDA), spray aluminized coatings (SA), electroless nickel…
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Turning of Inconel 825 with Coated Carbide Tool Applying Vegetable-Based Cutting Fluid Mixed with CuO, Al2O3 and CNT Nanoparticles by MQL

Vellore Institute of Technology-Venkatesan Kannan, Devendiran Sundararajan
Published 2019-10-11 by SAE International in United States
Inconel 825 is nickel (Ni)-iron (Fe)-chromium (Cr) alloy with additions of copper (Cu), molybdenum (Mo), and titanium (Ti). The alloy has excellent resistance to corrosion and is often the most cost-effective alloy in sulphuric acid piping vessels and chemical process equipment. No attempt of applying MQL with three nanofluids was reported conferring to the works accessed. The present study is focused on evaluating the effect of the addition of three nanoparticles (CuO, Al2O3, and CNT) in vegetable oil applied by MQL mode during turning of Inconel 825 with coated carbide tool. Cutting force, surface roughness, and tool wear are evaluated. The results showed that the addition of nCNT substantially improved the machining performance and smaller flank the tool edge, while the adhesion and abrasion are observed as wear mechanism and better results are obtained at 0.5% of nCNT+ vegetable oil to produce the lowest values.
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