Bainite

Question 1

Bainite is a mixture of

Answer 1

ferrite and carbide

Question 2

Bainite transf. has some attributes of

Answer 2

martensitic transf and some of nuc and growth

Question 3

Bs temp ______ with increase in CC

Answer 3

decrease

Question 4

Alloys ______ Bs

Answer 4

decrease

Question 5

Bainite formation _____ ____

Answer 5

requires time (at any given temperature (below Bs),
amount of bainite increases with time till it reaches the saturation value)

Question 6

Bainite has a ____ ____ ___ unlike martensite

Answer 6

finite growth rate

Question 7

Kinetics are _____ than pearlite transf

Answer 7

faster

Question 8

Upper bainite

Answer 8

long laths of ferrite, fine particles of cemetite

Question 9

Lower bainite

Answer 9

lenticular ferrite plates, ε-carbide particles have a rod like shape

Question 10

Bainite has strength and hardness _____ than fine

pearlite,but _____ than that of martensite.

Answer 10

higher; lower

Question 11

lower the transformation temperature, the

____ are the strength and hardness.

Answer 11

higher

Question 12

Ductility and toughness of bainite are_____ than those of martensite

Answer 12

higher

Question 13

Austempering:

Answer 13

heat treatment designed to produce bainite during an isothermal transformation, minimizes distortion and cracking