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α = Ferrite ϒ = Austenite δ = Delta Iron: Liquid+ δ

The iron-carbon diagram shows the phases and phase transformations that occur with changes in temperature and carbon content in iron-carbon alloys. It indicates that ferrite is the dominant phase at low carbon levels and temperatures below 910°C, while austenite is dominant at higher carbon levels and temperatures between 910-1400°C. Eutectic reactions occur at 4.3% carbon at 1148°C and at the eutectoid composition of 0.8% carbon at 727°C where austenite transforms to ferrite and cementite.

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Chaitanya Datta
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140 views1 page

α = Ferrite ϒ = Austenite δ = Delta Iron: Liquid+ δ

The iron-carbon diagram shows the phases and phase transformations that occur with changes in temperature and carbon content in iron-carbon alloys. It indicates that ferrite is the dominant phase at low carbon levels and temperatures below 910°C, while austenite is dominant at higher carbon levels and temperatures between 910-1400°C. Eutectic reactions occur at 4.3% carbon at 1148°C and at the eutectoid composition of 0.8% carbon at 727°C where austenite transforms to ferrite and cementite.

Uploaded by

Chaitanya Datta
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We take content rights seriously. If you suspect this is your content, claim it here.
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IRON CARBON DIAGRAM

Material Science And Metallurgy


Pacific School Of Engineering, Surat

α = Ferrite
ϒ = Austenite
Liquid+ δ
δ = Delta Iron

1495 ˚ C
δ 3000ºF
Liquid
2802ºF
ϒ+ δ
Liquid + ϒ Eutectic 2400ºF

1130 C ϒ + α Liquid+cementite
2000ºF

ϒ+ α 1333 1000˚F

TEMPERATURE ͦ F
α
ͦC

P
e
Pearlite + α
TEMPERATURE

a
Pearlite+
cementite 1000
r
l
i
t
e HYPO HYPER
EUTECTIC EUTECTIC
Hyper 410ºF
Hypo
Hypo Hyper
Eutectoid Eutectic
Eutectoid Eutectoid

Percentage carbon ( By Weight)

Cooling
Liquid
Heating
ϒ + Cementite
Cooling
Liquid α + Cementite
Heating

AUSTENITE LEDEBURITE CEMENTITE Cooling


Austenite α + Cementite
Heating

Prepared By:- Guided By : - Prof. Jenish M. Patel


Sanjay Neolia 151120119022
Prince Kumar 151120119031
Abhishek Mishra 151120119001 (Mechanical Engineering Department)
Pandey Niraj 151120119023

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