CAMT Material Properties & Characterization 3

Question 1

Which non-destructive evaluation (NDE) method is best suited to detect internal voids and delaminations in an AM metal part?

Accepted Answer

Industrial computed tomography (CT) scanning

Answer

Dye penetrant inspection

Answer

Magnetic particle inspection

Answer

Visual inspection

Question 2

The elongation at break of a material is a measure of its:

Accepted Answer

Ductility

Answer

Stiffness

Answer

Hardness

Answer

Thermal conductivity

Question 3

Which phenomenon in metal powder bed fusion causes parts to warp and detach from the build plate?

Accepted Answer

Thermal deformation caused by residual stress buildup during solidification

Answer

Over-sintering of the powder

Answer

Insufficient laser power

Answer

Excess powder in the chamber

Question 4

Stainless steel 316L is commonly used in metal AM for medical and chemical applications because it offers:

Accepted Answer

Excellent corrosion resistance due to molybdenum content

Answer

The highest strength of all stainless steels

Answer

The lowest melting point among stainless steels

Answer

Superior magnetic properties

Question 5

The purpose of Hot Isostatic Pressing (HIP) post-processing on metal AM parts is primarily to:

Accepted Answer

Eliminate internal porosity and improve mechanical properties through heat and pressure

Answer

Increase surface roughness

Answer

Remove support structures

Answer

Apply a surface coating

Question 6

Which property indicates a material's ability to absorb energy and deform plastically before fracturing, relevant to impact resistance?

Accepted Answer

Toughness

Answer

Yield strength

Answer

Modulus of elasticity

Answer

Hardness

Question 7

In FDM printing, the inter-layer adhesion strength is primarily influenced by:

Accepted Answer

Print temperature, cooling rate, and layer height

Answer

The color of the filament

Answer

The build volume of the printer

Answer

The brand of the printer