Answered step by step
Verified Expert Solution
Question
1 Approved Answer
Diffusional transformation in solids ( 1 0 P ) a . Write the four different energy terms involved in the calculation of the free energy
Diffusional transformation in solids P
a Write the four different energy terms involved in the calculation of the free energy change in heterogeneous nucleation in solids. p
b List the sequence of various nucleation sites in order of increasing order of free energy change due to defect destruction:
c List the structure and size range of GP Zone, Theta Double PrimeTheta Prime and Theta which evolve during the aging process after solution treatment and quenching in alloys. p
d How does partitioning affect the growth of pearlite in alloys? p
Diffusionless Martensitic Transformation P
a Write at least six important features associated with martensitic transformation. p
b What are the differences between lath and plate martensite with respect to morphology and formation temperature?
c Martensitic transformation is diffusionless, ie the change in crystal structure is achieved by a homogeneous deformation of austenite. The strain needed was first proposed by Bain in and is known as the "Bain strain". What is Bain strain? p
d What is autotempering? What are the two factors that the first laths form are thicker than those forming at lower temperatures in autotempering? p
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started