1. Establish the best association: (10 pts). a) Stress resistance to localized d

Question

1. Establish the best association: (10 pts). a) Stress resistance to localized deformation b) Elastic deformation critical crack extension value e) Modulus of elasticity due to cyclic loading application stress / strain d) Fracture point e) Plastic deformation f) Fatigue nonpermanent deformation rotational motion force g) Hardness load / area h) Torsion time-dependent elastic behavior i) Poisson's ratio permanent deformation lateral strain/ axial strain j) Anelasticity 2. TRUE or FALSE? (5 pts) a) Grain size reduction reduce the strength of a material. b) After "cold working" the material becomes harder. c) Mohs scale provides a qualitative elastic indexing test. d) After recrystallization a new set of strain-free grains is obtained. e) Ductile fracture takes place with non appreciable deformation.

Explanation / Answer

1) a: load /area

b:non permanent deformation

c:stress/strain

d:critical crack extension value

e: permanent deformation

f:due to cyclic loading application

g:resistance to locolized deformation

h:rotational motion force

i:lateral strain/axial strain

j:time dependent elastic behavior

2)

a:False;Strength increase with decreasing grain size

b:True;Cold working is a process of making a metal harder and stronger through plastic deformation.

c:False;it is a scale of hardness based on the ability of one mineral to scratch another

d:True

e:True

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