Question

What are the values of thickness of recast layers in Electro discharge machining?

(a) 0.001 to 0.025 µm

(b) 0.01 to 0.25 µm

(c) 1 to 25 µm

(d) 10 to 250 µm

The question was posed to me in quiz.

This question is from EDM-Heat Affected Zone (HAZ) in chapter Thermal Processes of Advanced Machining

Answer 1

The correct answer is (c) 1 to 25 µm

The best I can explain: In Electro discharge machining, the value of thickness of recast layers ranges from 1 to 25 µm.