What is a material selection chart?

Materials selection charts are used to screen out materials which do not meet the design constraints, and materials indices are used for ranking the shortlisted materials in order of excellence.

How do you select material for mechanical design?

The materials selection process for a component or joint between components involves these steps:

  1. Identify the design requirements.
  2. Identify the materials selection criteria.
  3. Identify candidate materials.
  4. Evaluate candidate materials.
  5. Select materials.

What is Ashby method?

A useful method of doing this is by plotting them as Material Property Charts, sometimes called ‘bubble’ or ‘Ashby’ charts, with one property on one axis and another property on the other. Each material has a range of values for each property, depending on the exact composition, grade, heat treatment, supplier etc.

How is material selection done?

Thus in the selection of a material: First, we decide on the requirements of the application. Second, we decide on the possible materials we can use in the application. Third, we decide what changes in the material properties are needed.

Why do we select materials?

When it comes to material selection, design engineers you hire for your projects will more than likely have certain specific factors they look for as well. The fact is, material selection is very important because engineers have to plan for any potential consequences that certain materials may present.

What is procedure of material selection?

Material selection is the foundation of all engineering applications and design. This selection process can be defined by application requirements, possible materials, physical principles, and selection.

How do you test material?

  1. Mechanical testing. Static tension and compression tests. Static shear and bending tests.
  2. Measurement of thermal properties. Thermal conductivity. Specific heat.
  3. Measurement of electrical properties.
  4. Testing for corrosion, radiation, and biological deterioration. Corrosion. Radiation.
  5. Nondestructive testing. Liquids. Radiation.

What are the criteria for material selection?

Materials selection criteria

  • Availability. One of the baseline requirements for any material is consistently reliable availability.
  • Design flexibility.
  • Cost per unit.
  • Performance properties.
  • Regulatory compliance.
  • Biocompatibility.
  • Aesthetics and usability.
  • Manufacturing efficiency.

What are the three criteria that are important in the materials selection process?

What is the purpose of a material selection chart?

Ashby’s materials selection charts (Ashby, 1992, 1997b) are helpful for the initial screening of materials, and aimed at comparing different materials on the basis of more than one material property. Materials selection charts are very useful in showing trade-offs between two material properties as shown in Fig.

How are merit indices used in material selection?

Material selection chart, showing Young’s modulus E against density ?. Two index lines are shown for stiffness-limited lightweight design. On logarithmic scales, constant values of the merit indices plot graphically as straight lines – for example, E /? = constant is a line of slope 1, while for E1/3 /? = constant the slope will be 3.

What is the piping material selection guide for Process Systems?

The Piping Material Selection Guide for Process Systems, as the title states, is a guide for the piping engineer who is faced with the challenge of choosing the correct piping materials of construction. The list of codes and standards in ASME B31.3 that apply to process plant design is huge, and it is impossible to cover them all in one book.

What are the stages of the materials selection process?

Stages of the selection process are: • analysis of the performance requirements and creating alternative solutions, • initial screening of solutions, • comparing and ranking alternative solutions, and • selecting the optimum solution.