The malleability is the property of a material by virtue of which a material-
Can be rolled or hammered into thin sheets
Understanding Malleability: A Key Material Property
The question asks us to identify the property of a material known as malleability. Malleability is one of the important mechanical properties that describes how a material behaves under compressive stress.
What is Malleability?
Malleability is the ability of a material to deform under compressive stress without fracturing. This deformation typically involves changing shape, such as being flattened or spread out.
Analyzing the Options
Let's look at each option provided to determine which one accurately defines malleability:
- Can be rolled or hammered into thin sheets: This statement describes a material that can be flattened or spread out under impact or pressure (compressive forces) without breaking. This aligns perfectly with the definition of malleability.
- Regains its shape and size after the removal of external forces: This property is known as elasticity. Elastic materials return to their original form once the deforming force is removed.
- Retains the deformation produced under load permanently: This property describes plasticity. A plastic material undergoes permanent deformation when subjected to stress beyond its elastic limit.
- Can be drawn into wires with the application of a tensile force: This property is called ductility. Ductility is the ability of a material to be stretched into a wire under tensile stress.
Based on the definitions, the property by which a material can be rolled or hammered into thin sheets is indeed malleability.
Conclusion on Malleability
Malleability is a desirable property in many applications, especially where materials need to be shaped by hammering, pressing, or rolling. Metals like gold, silver, aluminum, and copper are known for their high malleability.
Revision Table: Material Properties
| Property | Description | Type of Force | Example Process |
|---|---|---|---|
| Malleability | Ability to be hammered or rolled into thin sheets without fracturing | Compressive | Rolling, hammering |
| Ductility | Ability to be drawn into wires without fracturing | Tensile | Wire drawing |
| Elasticity | Ability to regain original shape after load removal | Any (within elastic limit) | Stretching a rubber band |
| Plasticity | Ability to undergo permanent deformation under load | Any (beyond elastic limit) | Bending a metal rod permanently |
Additional Information on Material Properties
Understanding material properties is crucial in engineering and manufacturing. Materials are selected for specific jobs based on how they will perform under expected conditions. While malleability and ductility are often discussed together as they both relate to a material's ability to deform plastically, they describe deformation under different types of stress – malleability under compression and ductility under tension.
Materials can possess varying degrees of these properties. For instance, some materials might be highly malleable but not very ductile, and vice versa, although many metals tend to be both malleable and ductile.
Important Questions from Mechanical Properties
Compressibility is the reciprocal of -
The ability of a material to absorb energy in the elastic region is called-
The failure of the material due to cyclic loads is known as-
Charpy’s V notch test is done on a building material to determine
Which of the following is the CORRECT relationship between the Young's modulus(E) and Bulk modulus(K) of a material?
(Here: μ = Poisson's ratio) (Symbols and notations carry their usual meaning)
