Engineering/Materials and Processes -Notch Toughness Sample Test,Sample questions

Question:
As the grain size decreases, the ductile to brittle transition temperature _________

1.increases

2. decreases

3.remains the same

4.no defined relationship between them


Question:
The Ductile fracture depends strongly on strain rate compared with brittle fracture, which is relatively insensitive to strain rate.

1.True

2. False


Question:
The ductile to brittle transition does not depend on the metallurgical feature. It is material-specific property.

1.True

2.False


Question:
The grain size has an effect on the ductile or brittle failure of material.

1.True

2.False


Question:
The presence of notch in material will _______________ the ductile to brittle transition temperature of the material.

1.increase

2.decrease

3.remain constant

4.not dependent on notch


Question:
The presence of second phase particle reduces the ductility of the material. The type of particle which has the least effect in lowering the ductility is __________

1.spherical precipitates

2.platelike precipitates

3.rodlike precipitates

4.acicular precipitates


Question:
Which of the following force is responsible for forcing dislocation together during cracking?

1.Tensile force

2.Shear force

3.Bending force

4.Torsional force


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