What are the important properties of a material
Answers
Answer:
The important properties of material are:
- Physical properties: It includes luster, color, size and shape, density, elastic and thermal conductivity, and melting point.
- Chemical properties: It includes chemical composition, structure, etc.
- Mechanical properties:
Answer:
. Physical properties:
It includes luster, color, size and shape, density, elastic and thermal conductivity, and melting point.
2. Chemical properties:
It includes chemical composition, structure, etc.
3. Mechanical properties:
The mechanical properties of materials are the properties which describe the behavior of the material under the action of external forces. They usually relate to elastic and plastic behavior of the materials. Some mechanical properties are as follows:
A. Strength: It is the ability of material to resist the externally applied force without breaking or yielding. It is expressed as tensile strength, a compressive strength or shear strength.
B. Stiffness: It is the ability of material to resist the deformation under stress.
C. Elasticity: It is defined as the ability of the material to regain its original shape and size after the deformation, when the external forces are removed. All engineering metals are elastic but the degree of elasticity varies from metal to metal. Steel is perfectly elastic within elastic limit. This property is desirable for materials used in tools and machines.
D. Plasticity: It is defined as the ability of of the material to retain the deformation produced under the load on permanent basis. It is necessary for forgings, in stamping images on coins and ornamental work.
E. Resilience: The ability of a material to absorb energy within its elastic limit without any permanent deformation is called Resilience. It is measured by a quantity called modulus & resilience. It is essential for spring material.
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