The fracture strength of a brittle material like a ceramic i

The fracture strength of a brittle material, like a ceramic increases by increasing the number of internal cracks and notches, which may increase the resistance to fatigue of the material. T Crazing is a very localized plastic deformation in thermoplastic polymers. In a heat treated alloy the precipitate enhances the dislocation movement and thereby decreases the strength of the alloy. As Cold work increases yield strength and tensile strength decreases. Meta-stable state is a very slow, imperceptible change in structure with time. Metal parts subjected to repetitive stresses will fail due to fatigue loading at a much lower stress than that which the material can withstand under the application of a single static stress. Carburizing or nitriding (case hardening technique) enhances both surface hardness and fatigue life for steel alloys. Creep is a form of failure that occurs in structures subjected to dynamic and fluctuating stress. Plagiarism involves using the works of others and not giving due credit. It is a form of cheating or theft and should be avoided. Prior deformation of the metal, time and temperature affect the recrystallization process in metals and alloys.

Solution

c)true

d)false

e)true

g)true

i)false

j)true