Materials

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  • Topic: Austenite, Steel, Iron
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  • Published : December 30, 2012
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UNIVERSITI MALAYSIA PERLIS
PUSAT PENGAJIAN KEJURUTERAAN MEKATRONIK
School of Mechatronics Engineering

Assignment
Material Engineering ENT 145

Name: Ahmad Huzaifah Bin Azahari
No. Matrik: 121110055
Course: Mechanical  
QUESTION 1
DESCRIBE CHARACTHERISTICS OF (a) AN ALLOY (b) PEARLITE (c) AUSTENITE (d) MARTENSITE (e) CEMENTITE (f) SPHERODITE AND (g) TEMPERED MARTENSITE. (a)ALLOY
Alloy steel is often subdivided into two groups: high alloy steels and low alloy steels. The difference between the two is defined somewhat arbitrarily. However, most agree that any steel that is alloyed with more than eight percent of its weight being other elements beside iron and carbon, is high alloy steel. Low alloy steels are slightly more common. The physical properties of these steels are modified by the other elements, to give them greater hardness, durability, corrosion resistance, or toughness as compared to carbon steel. To achieve such properties, these alloys often require heat treatment..Example of an alloy Alloy of aluminium:

Duralumin,nambe,silumin

Alloy of cobalt:
Megallium,alnico,vitallium

Alloy of copper:
billon,brass,berryllium copper,bronze.

Charactheristics of an alloy:
Hardenability: the capability of the alloy to be hardened through heat treatment Hardness/strength: the capability to resist pressure, force or other stress Heat resistance: the capability to resist heat

Thermal conductivity: the capability to conduct heat
Electrical conductivity: the capability to conduct an electrical current Machinability: the capability to be worked to a particular finish Ductility: the capability to deform under tensile stress (be stretched) Malleability: the capability to be worked under compressive stress (be compacted) Weldability/joinability: the capability to be welded

Elasticity: the capability to return it to its original form after stress Plasticity: the capability to undergo permanent shape...
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