Determine0 the validity of each of following statements concerning the Fe-Fe_3C

Question

Determine0 the validity of each of following statements concerning the Fe-Fe_3C steel system Toughness in steels' is derived from having a continuous cementite matrix Carbon it generally more soluble in austenite (gamma-Fe) than ferrite (a-Fe) Austenite (gamma-Fe) is more ductile than ferrite (a-Fe) Strength in steels increases with increasing carbon concentration Hardness in steels increases with increasing cementite (Fe_3C) concentration Slow cooling of a steel containing 0 76 wt% carbon will produce a microstructure featuring a protected phase Strength in steels increases with increasing cementite/ferrite interfacial area Marten site is an equilibrium phase of steels

Explanation / Answer

1. true( toughness in steels is derived from having a continuous cementite matrix)

2.true (carbon is generally more soluble in austenite than ferrite)

3. false( austenite is more ductile than ferrite )

4.true

5.false

6.true

7.true

8.false- (martensite is an quilibrium phase of steels.)

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