Question

1 Check if the statement is true (U) or false (F). (3 point each, total 30 points) 1) Material properties can be changed through alloying, processing, and heat treatment. Alloying is during material production, processing is during manufacturing or material shaping, and heat treatment can be done any time without changing the shape. (T , F) 2) Finer grain of the crystalline materials makes material stronger. ( T F ) 3) During punching process, high clearance between the punch and the die results in higher punching forces. (T , F) 4) Annealing a material can be used to make it more formable. (T. F) 5) Fine blanking is used to reduce forces compared to conventional sheet metal blanking. (T , F) 6) During the casting process, larger surface area of the casted product results in faster cooling. (T , F) 7) The main advantage of hydrostatic extrusion is reduced friction forces. ( T F ) 8) Explosion welding uses explosion energy to melt two materials. (T , F) 9) As the friction angle increases, the shear plane angle decreases in the metal cutting. (T, F) 10) As cutting ratio increases, shear plane angle decreases. (T, F)

Answer 1

I Material properties com be changed through albying processing and heat treatment. Alloying is done during material Production, processing during manufacturing and heat treatment any time with changine the shape. Hence, the statement is Twe. 2. The smaller the grain size, the strength is higher. Hence, finer the grain of the crystalline material, stronger is the material . Hence, option statement is Twe. E

3. The statement that higher the dearance, higher the punching forces is False 4 As annealing increases the ductility of the material, hence it makes the material more formable. Hence, given statement is True