Revision (Chapter 5a b)2

8/16/2019 Revision (Chapter 5a b)2

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Revision (Chapter 5a)

Based on Ge-Ag phase diagram below,

1Prepared by : Kow Kien Woh



L

αL+α

L + Ge

α + Ge

0olutions1(a)



L

α

L+αL + Ge

α + Ge



Revision (Chapter 5b)

3.g.

Based on 444diagram,determine the

struture !orm A43AC 04AG3 asmarternsite is1

eated to 6**C,7uenhed to 5**C, hold !or * s,and !urther7uenhed to roomtemperature. 7

Prepared by : Kow Kien Woh




(a) eated to 6**C Austenite

(b) 8uenhed to

5** C, hold !or *s

**+ Bainite

() 9urther7uenhed to roomtemperature

**+ Bainite





3.g. $


struture !orm A43AC 04AG3 aspearlite is1

eated to 5*C,7uenhed to :* Chold !or * s, then7uenhed to * Chold !or #*s, and;nall 7uenhed to9





3.g.



eated to **C,7uenhed to $5* Chold !or ***s,and ;nall7uenhed to roomtemperature 11





(a)eated to **C

4he allo is lowerthan $C, thus noaustenite !orm. 4he

struture will remainsas pearlite.





3.g. %



eated to %*C,7uenhed to $5* Chold !or ***s,and ;nall7uenhed to roomtemperature 13





(a) eated to %*C Austenite

(b) 8uenhed to

$5* C, hold !or*** s

5*+ Bainite

5*+ Austenite

() 9urther7uenhed to roomtemperature

5*+ Bainite, 14Prepared by : Kow Kien Woh




3.g. 5



eated to %*C,7uenhed to $* Chold !or $* hours,and ;nall7uenhed to roomtemperature 15


Revision (Chapter 5a b)2

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