- published: 24 Dec 2013
- views: 61309
In materials science, ductility is a solid material's ability to deform under tensile stress; this is often characterized by the material's ability to be stretched into a wire. Malleability, a similar property, is a material's ability to deform under compressive stress; this is often characterized by the material's ability to form a thin sheet by hammering or rolling. Both of these mechanical properties are aspects of plasticity, the extent to which a solid material can be plastically deformed without fracture. Also, these material properties are dependent on temperature and pressure (investigated by Percy Williams Bridgman as part of his Nobel Prize–winning work on high pressures).
Ductility and malleability are not always coextensive – for instance, while gold has high ductility and malleability, lead has low ductility but high malleability. The word ductility is sometimes used to encompass both types of plasticity.
Ductility is especially important in metalworking, as materials that crack, break or shatter under stress cannot be manipulated using metal-forming processes such as hammering, rolling, and drawing. Malleable materials can be formed cold using stamping or pressing, whereas brittle materials may be cast or thermoformed.
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Master your vocabulary by watching this Interactive way of Learning NEW English Words. Learn the meaning and the usage of the word 'Malleable' in a fun filled way!
I created this video for use in my Chemistry course. I use it to illustrate two important properties of metals: malleability and ductility. Malleability is the ability to be bent or molded into different forms. Ductility is the ability to be drawn out into a thin wire form.
The Paper Kites - Malleable Beings from "States" (2013)
Malleability:Place any one metal on a block of iron and strike it four or five times with a hammer. Observe the change in the shape of the metal?You will find that some metals can be beaten into thin sheets. This property is called malleability. Gold and silver are the most malleable metals.Ductility:The ability of metals like iron,copper and aluminium to be drawn into thin wires is called ductility.Gold is the most ductile metal. From one gram of gold we can be drawn a wire of 2 km length. Can you name some metals that are used for making cooking vessels?Let us do the experimental activity to find out the answer. 7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customize the content as per your requirement for companies platform provi...
This 4 minute flash video attempts to explain why metals are both malleable and ductile - in terms of layers of cations that can slide over one another - while delocalised electrons prevent repulsions between them.
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Music: Love, Corgan, Erlandson Lyrics: Love
Crash and burn
All the stars explode tonight
How'd you get so desperate
How'd you stay alive
Help me please
Burn the sorrow from your eyes
Oh, come on be alive again
Don't lay down and die
Hey, hey
You know what to do
Oh, baby, drive away to Malibu
Get well soon
Please don't go any higher
How are you so burnt when
You're barely on fire
Cry to the angels
I'm gonna rescue you
I'm gonna set you free tonight, baby
Pour over me
Hey, hey
We're all watching you
Oh, baby, fly away to Malibu
Cry to the angels
And let them swallow you
Go and part the sea, yeah, in Malibu
..And the sun goes down
I watch you slip away
And the sun goes down
I walk into the waves
And I knew
Love would tear you apart
Oh and I knew
The darkest secret of your heart
I'm gonna follow you
Oh baby, fly away, yeah, to Malibu
Oceans of angels
Oceans of stars
Down by the sea is where you
Drown your scars
..I can't be near you
The light just radiates
I can't be near you