Properties of Metal

Question 1

It is determined by the percentage of parent metal and other elements used to make an alloy.

Answer 1

metal’s strength

Question 2

Stress Strain Curve
U -
R -
Y -
E -
P -

Answer 2

Ultimate Strength
Rupture Strength
Yield point
Elastic limit
Proportial limit

Question 3

It is the maximum tensile load per unit area which a material can withstand

Answer 3

Tensile Strength

Question 4

It is the ability of metal to resist deformation.

Answer 4

Yield Strength

Question 5

It is the maximum stress a material can
sustain without rupture.

Answer 5

Ultimate Strength

Question 6

It is the maximum stress expected in any
structural member.

Answer 6

Limit Strength

Question 7

describes a metal’s ability to
resist opposing forces.

Answer 7

Shear Strength

Question 8

the ability of a joint to withstand any
form of crushing or excessive compressive distortion.

Answer 8

Bearing Strength

Question 9

It is defined as a material’s ability to resist
deformation under load.

Answer 9

Flexural Strength

Question 10

is the greatest stress a material can withstand without a permanent deformation remaining
upon complete release of the load.

Answer 10

Elastic Limit

Question 11

is the load per unit are acting on a materials

Answer 11

Stress

Question 12

is the deformation of a material caused by an applied load

Answer 12

Strain

Question 13

is the greatest stress at which strain (deformation) is directly proportional to
stress.

Answer 13

Proportional Limit

Question 14

is a stress a material can withstand without resulting in permanent elongation of more than 0.0001 inch per inch of gage length after complete release of stress.

Answer 14

Proof Stress

Question 15

– is the difference in gage length before being subjected to any strength and after rupture.

Answer 15

Elongation

Question 16

– is the difference between the original cross-sectional area and the least cross-sectional area after rupture.

Answer 16

Reduction of Area

Question 17

This is any strain remaining after removing the stress.

Answer 17

Permanent Set

Question 18

– is the ratio of ultimate stress to limit stress. For nearly all aircraft design, the ultimate factor is 1.5

Answer 18

Ultimate Factor (Factor of Safety)

Question 19

– ultimate factor minus 1

Answer 19

Margin of Safety

Question 20

– the ratio of maximum to minimum stress applied in one cycle of loading in fatigue test.

Answer 20

Stress Ratio

Question 21

– is the ratio of applied load per deformation

Answer 21

Stiffness Ratio

Question 22

– is the ratio of lateral strain to axial strain

Answer 22

Poisson’s Ratio

Question 23

refers to its ability to resist cutting,
penetration, or abrasion.

Answer 23

Hardness

Question 24

Some metals are hardened through ________ ,
while others are softened by a process called
__________.

Answer 24

heat-treating or work-hardening, annealing

Question 25

describes a material's tendency to break or shatter when exposed to stress, and is the opposite of ductility and malleability

Answer 25

Brittleness

Question 26

A material's ability to be bent, formed, or shaped without cracking or breaking

Answer 26

Malleability

Question 27

The ability of metal to be drawn into wire stock, extrusions, or rods

Answer 27

Ductility

Question 28

a material's ability to resist tearing or breaking, when it is bent or stretched

Answer 28

Toughness

Question 29

describes a metal's tendency to return to its original shape after normal stretching and bending

Answer 29

Elasticity

Question 30

the property which enables a metal to carry heat or electricity

Answer 30

Conductivity

Question 31

The property of a metal to expand when heated and shrink when cooled

Answer 31

Expansion and Contraction

Question 32

The ability of metal to be joined by heating and melting is

Answer 32

Fusibility

Question 33

material's mass per unit volume.

Answer 33

Density