Unformatted text preview: a. logarithmic region b. steady state region c. stage III of deformation with time ( b ) 4. A hardness testing machine that has capability for testing microhardness testing is a. Brinnel hardness test b. Vickers diamond pyramid test c. Rockwell hardness test ( c ) 5. Critical fracture toughness is a function of a. stress applied b. crack size c. grain size ( c ) Bonus DBTT is observed only in materials with crystal structure of a. fcc b. bcc c. hcp ( b )...
View Full Document
- Fall '08
- Materials Science, Tensile strength, Rockwell scale