Question

What kind of metals are used for milling operations?

(a) Soft and brittle

(b) Soft and elastic

(c) Hard and brittle

(d) Hard and elastic

This question was posed to me during an interview.

I need to ask this question from Fabrication of Nanomaterials in division Nanomaterials of Engineering Physics II

Answer 1

Correct answer is (c) Hard and brittle

Explanation: For the milling operation, normally hard brittle materials with fracture, deform and cold weld are used. The reason for choosing dense materials is the fact that the kinetic energy of balls depends upon their mass and velocity.