Chapter 9: Neutron Irradiation

Question 1

What is irradiation softening?

Answer 1

Irradiation causes yield strength to increase but failure occurs sooner.

Question 2

What does IGSCC stand for?

Answer 2

Intergranular stress corrosion cracking

Question 3

What is IGSCC?

Answer 3

Occurs when applied stress intensity is below Kic and requires i) specimen loading, ii) susceptible alloy, and an iii) aggresive environment.

Question 4

What does HAZ stand for in welds?

Answer 4

Heat affected zone

Question 5

Is the HAZ crack susceptible or resistance?

Answer 5

suceptible

Question 6

What does IASCC stand for?

Answer 6

Irradiation-assisted stress corrosion cracking

Question 7

What is IASCC?

Answer 7

Occurs in components that have not been thermally sensitized but are exposed to fast neutron fluxes

Question 8

What is senzitation?

Answer 8

Carbon and chromium in solution form carbides that remove cr from the matrix and occurs preferentially near grain boundaries.