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Ceramic Bound Materials: A Suitable Solution for Light Brakes

2Dto3D S.r.l.s.-Marco Dastrù
Chilches Materials S.A.-José Carlos Serrano-Posada
  • Technical Paper
  • 2019-01-2109
To be published on 2019-09-15 by SAE International in United States
A ceramic bound matrix has been investigated to be used as a friction material. The materials were produced by means of ceramic technology using frits containing silicates, and ceramic friction modifiers such as tin oxide, zircon, iron oxide, magnesium oxide. Four formulations were tested by means of a tribometer (pin-on-disc tester) using a gray cast iron counterpart. Test section included speeds between 1 and 12 ms-1, and loads between 25 and 400 N. The coefficient of friction of the tested specimens were between 0.7 and 0.4, and exhibited sensitivity to speed at low loads (25 N), while they are quite stables at high loads (400N). The characterization of the tribolayers was carried out by means of scanning electron microscopy. The four developed materials were named A, B, C, and D. They exhibited different wear rates and coefficients of friction. All the materials exhibited sensitivity to speed, while showed a lower sensitivity to load. The coefficient of friction level seems to be suitable for brake applications, oscillating between 0.6 and 0.4, depending on the test section.…
 

Shear Assisted Processing and Extrusion

  • Magazine Article
  • TBMG-34754
Published 2019-07-01 by Tech Briefs Media Group in United States

Shear Assisted Processing and Extrusion (ShAPE™) allows creation of wire, bar, and tubular extrusions that show significant improvement in material properties; for example, magnesium extrusions have been manufactured with unprecedented ductility (how far the material can stretch before it breaks) and energy absorption (how much energy can be absorbed during compression of a tubular extrusion) over conventional methods.

 

Aluminum Alloy, Plate 3.5Cu - 1.0Li - 0.40Mg - 0.35Mn - 0.45Ag - 0.12Zr (2050-T34) Solution Heat Treated and Stress Relieved

AMS D Nonferrous Alloys Committee
  • Aerospace Material Specification
  • AMS4372A
  • Current
Published 2019-05-23 by SAE International in United States
This specification covers an aluminum-lithium alloy in the form of plate 0.500 to 6.500 inches (12.70 to 165.00 mm) in nominal thickness (see 8.5).
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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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Aluminum Alloy Plate (7081-T7451) 7.2Zn - 1.5Cu - 2.0Mg - 0.10Zr Solution Heat Treated, Stress Relieved and Overaged

AMS D Nonferrous Alloys Committee
  • Aerospace Material Specification
  • AMS4410A
  • Current
Published 2019-05-07 by SAE International in United States
This specification covers an aluminum alloy in the form of plate.
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Aluminum Alloy Plate (7081-T7651) 7.2Zn - 1.5Cu - 2.0Mg - 0.10Zr Solution Heat Treated, Stress Relieved and Overaged

AMS D Nonferrous Alloys Committee
  • Aerospace Material Specification
  • AMS4411A
  • Current
Published 2019-05-07 by SAE International in United States
This specification covers an aluminum alloy in the form of plate.
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Nonferrous Metals Bundle

  • Professional Development
  • PD281944
Published 2019-04-24

Nonferrous materials are malleable, are non-magnetic, and have no iron content which gives them higher resistance to rust and corrosion. The following five on-demand courses are included in the Nonferrous  Metals bundle.  Each course is approximately one-hour in duration. See Topics/Outline for additional details.

 

INSERT - THIN WALL, SHORT AND LONG HOLE PREPARATION FOR

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS3508A
  • Current
Published 2019-04-09 by SAE International in United States
No Abstract Available.
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Multi-Material Topology Optimization as a Concept Generation and Design Tool

General Motors of Canada-Manish Pamwar, Balbir Sangha
Queen's University-Garrett Vierhout, Stephen Roper, Daozhong Li, Il Yong Kim
Published 2019-04-02 by SAE International in United States
Conventional vehicle design is continually being pushed by consumers and regulations to reach higher level of fuel efficiency and system performance. New methods such as use of alternative structural materials and structural optimization are being utilized heavily in the automotive industry. Currently, materials such as advanced composites, polymers, aluminum and magnesium are all being considered as candidates for alternatives to conventional steel parts to help meet lightweight performance targets.While topology optimization has proven to be a powerful in many case studies for automotive light weighting studies, it is currently constrained for use with one material in the optimization algorithm. Multi-material topology optimization (MMTO) methods presented in this paper demonstrate the tools capability to optimize material selection simultaneously alongside material layout for a given design space and desired weight target. Extensions to MMTO methodology demonstrate the ability to manipulate the mathematical problem statement for optimization in order to achieve a desired amount of each material in the final solution.Discussed in this paper is the application of MMTO to an automotive case study and the examination of…
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Multi-Material Topology Optimization: A Practical Method for Efficient Material Selection and Design

General Motors-Balbir Sangha, Manish Pamwar
Queen's University-Garrett Vierhout, Stephen Roper, Daozhong Li, Il Yong Kim
Published 2019-04-02 by SAE International in United States
As conventional vehicle design is adjusted to suit the needs of all-electric, hybrid, and fuel-cell powered vehicles, designers are seeking new methods to improve system-level design and enhance structural efficiency; here, multi-material optimization is suggested as the leading method for developing these novel architectures. Currently, diverse materials such as composites, high strength steels, aluminum and magnesium are all considered candidates for advanced chassis and body structures. By utilizing various combinations and material arrangements, the application of multi-material design has helped designers achieve lightweighting targets while maintaining structural performance requirements. Unlike manual approaches, the multi-material topology optimization (MMTO) methodology and computational tool described in this paper demonstrates a practical approach to obtaining the optimum material selection and distribution of materials within a complex automotive structure.Discussed in this paper is the application of MMTO and the examination of results obtained from 1-material, 2-material and 3-material optimization. First the effect of number of materials in the design and its effect on design performance is analyzed. Next individual material combinations and their effect on the final design performance are…
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