On the Influence of Material Selection Decisions on Second Order Cost Factors

2013 ◽  
pp. 59-79
Author(s):  
Marco Leite ◽  
Arlindo Silva ◽  
Elsa Henriques
Keyword(s):  
Material Selection ◽  
Second Order ◽  
Selection Decisions ◽  
Cost Factors

Demonstration of a 300°C Capable Directional Drilling Steering Tool (DM300)

2013 ◽  
Vol 2013 (HITEN) ◽  
pp. 000166-000173
Author(s):  
D MacGugan
Keyword(s):  
Material Selection ◽  
Silicon On Insulator ◽  
Sensor Technology ◽  
Directional Drilling ◽  
Applied Physics ◽  
Directional Sensors ◽  
Selection Decisions ◽  
Bottom Hole Assembly ◽  
Flux Gate ◽  
Processing Techniques

Honeywell Aerospace, along with Applied Physics Systems, Sunnyvale, CA, has developed 300°C capable directional sensor technology in support of the U.S. Department of Energy's Enhanced Geothermal Technologies initiative. The development has culminated in fabrication of custom silicon-on-insulator IC's, fabrication and assembly of ceramic hybrid electronics, and the directional sensors, accelerometers and flux-gate magnetometers, all capable of operating at temperatures up to 300°C. The sensors and supporting hybrid electronics have been integrated into a non-magnetic chassis designed for inclusion in a directional drilling bottom-hole assembly. This paper presents the technology approach, material selection decisions, processing techniques, final sensor and electronics configuration, and initial testing of the integrated directional module.

Selection of Heat Treat Process for Optimum Gear Design

2000 ◽  
pp. 185-188
Keyword(s):  
Material Selection ◽  
Material Design ◽  
Heat Treating ◽  
Gear Design ◽  
Successful Design ◽  
Design Requirements ◽  
The Cost ◽  
Design And Manufacture ◽  
Cost Factors ◽  
Selection Of

Abstract The successful design and manufacture of gears are influenced largely by design requirements, material selection, and proper heat treatment. This chapter addresses the cost factors and tradeoffs involved in selecting a material, design features, and a heat treating process to optimize gear performance for a particular application.

Material Selection Using TOPSIS Combined with Grey Relation Analysis

2014 ◽  
Vol 540 ◽  
pp. 476-479 ◽  
Author(s):  
Xue Jun Xie
Keyword(s):  
Material Selection ◽  
Selection Problem ◽  
Grey Relation Analysis ◽  
Real Material ◽  
Selection Decisions ◽  
Multi Attribute Decision Making ◽  
Relation Analysis ◽  
Optimal Material ◽  
Grey Relation ◽  
Selection Of

The selection of an optimal material is an important aspect of design for mechanical, electrical, thermal, chemical or other application. Material selection problem is a multi-attribute decision making (MADM) problem, which has several evaluation attributes. The selection decisions are complex, as material selection is more challenging today. This paper proposes a new MADM method for material selection problem. Combining the TOPSIS with grey relation analysis, the method proposed a comprehensive value to evaluate and select the best alternative. A real material selection case is used to demonstrate that the proposed method is effectiveness and feasibility.

A Design Based Approach to Material Selection for Advanced High Temperature Reactor Components

2017 ◽  
Author(s):  
T.-L. Sham ◽  
Robert I. Jetter
Keyword(s):  
Material Properties ◽  
Material Selection ◽  
Thermal Gradients ◽  
Performance Goal ◽  
Relative Ability ◽  
Sustained Loading ◽  
Selection Decisions ◽  
Simple Consideration ◽  
High Temperature Reactor ◽  
Selection For

Material selection decisions for advanced reactor concepts are frequently based on simple consideration of required wall thickness for a particular component and the resultant cost based on averaged cost per unit, usually by weight. However, this approach does not take into consideration the overall impact of other material properties on design feasibility. An example would be the interrelated roles of thermal conductivity, thermal expansion and creep-strength on the design of components to withstand cyclic and sustained loading. The problem is that this would nominally require a detailed design and loading definition. However, as presented herein, a meaningful comparison can be achieved by selective evaluation of the ratios of the material properties required to achieve a particular performance goal for a particular design objective; for example, the relative ability to accommodate axial thermal gradients in a pressurized cylindrical vessel. This paper covers the development of such critical parametric ratios for a number of component elements and loadings and illustrates their application.

Development of a Sustainability Scoring Method for Manufactured Automotive Products: A Case Study of Auto Body Panels

2007 ◽  
Author(s):  
C. A. Ungureanu ◽  
S. Das ◽  
I. S. Jawahir
Keyword(s):  
Material Selection ◽  
Consumer Products ◽  
Evaluation Methodology ◽  
Motor Vehicles ◽  
Automotive Application ◽  
Contributing Factors ◽  
Scoring Method ◽  
Traditional Use ◽  
Selection Decisions ◽  
Auto Body

Undoubtedly, motor vehicles are among the most important, yet difficult to maintain and environmentally damaging consumer products on the planet. In light of the ongoing climate change discussion, sustainability considerations are currently taking a more prominent role in material selection decisions for automotive applications. This paper presents a new sustainability evaluation methodology for computing the potential benefits of using lighter materials, such as aluminum, in auto body applications, through a “Sustainability Scoring” method. When evaluating the “level of sustainability” built in any product, several major contributing factors (sustainability elements) need to be taken into consideration. Six major integral sustainability elements considered in this work are: product’s environmental impact, societal impact, functionality, resource utilization and economy, manufacturability and recyclability/remanufacturability. Each of these elements has corresponding sub-elements and influencing factors which are categorized as having varying levels of importance to the product. The paper compares the use of aluminum with the traditional use of steel alloys in a given automotive application using the newly developed comprehensive sustainability scoring method by considering all sustainability elements and sub-elements associated with a vehicle over its total life-cycle.

Disappearance Voltage Determinations Using a Convergent Beam

1971 ◽  
Vol 29 ◽  
pp. 184-185
Author(s):  
W. L. Bell
Keyword(s):  
Second Order ◽  
Objective Method ◽  
Uniform Thickness ◽  
Rocking Curve ◽  
Crystal Perfection ◽  
Kikuchi Line ◽  
Central Maximum ◽  
Diffraction Patterns ◽  
Convergent Beam ◽  
Beam Technique

Disappearance voltages for second order reflections can be determined experimentally in a variety of ways. The more subjective methods, such as Kikuchi line disappearance and bend contour imaging, involve comparing a series of diffraction patterns or micrographs taken at intervals throughout the disappearance range and selecting that voltage which gives the strongest disappearance effect. The estimated accuracies of these methods are both to within 10 kV, or about 2-4%, of the true disappearance voltage, which is quite sufficient for using these voltages in further calculations. However, it is the necessity of determining this information by comparisons of exposed plates rather than while operating the microscope that detracts from the immediate usefulness of these methods if there is reason to perform experiments at an unknown disappearance voltage.The convergent beam technique for determining the disappearance voltage has been found to be a highly objective method when it is applicable, i.e. when reasonable crystal perfection exists and an area of uniform thickness can be found. The criterion for determining this voltage is that the central maximum disappear from the rocking curve for the second order spot.

Sign in / Sign up

Export Citation Format

Share Document