ferrous metals

0.3-0.8 %.

a high carbon steel

ferrite and cementite

Strong but hard and brittle

It is likely to be high carbon steel

is the opposite to elasticity

brittleness

Shear strength

toughness

impact tests

a steel ball indenter

decrease in internal stress ,softening of the metal

relieves internal stress suffered after engineering processes

either on individual components or on complete aircraft structure

heat-treating process of metal produces a hard, wear-resistant surface over a strong, tough core

ability of a material to conduct a certain amount of heat within a given time, copper is a good example.

ammonia gas

a lower VPN than the steel

bauxite to alumina

2000 series of aluminum alloy

made of C-110M titanium

high temperature , corrosion resistance alloys

1668˚C

Wrought (worked) and Cast

silvery white metal which is soft and ductile

decrease corrosion resistance of the aluminum

5% of alloy thickness

three (3) times

to make rivets

7

magnesium and silicon

7 Seconds

90% nitrate and 10% sodium nitrate

the process of heating aluminium at prescribed temperature for a prescribed time and then cooling rapidly usually by quenching in water

speed up age hardening process

a plastic resin matrix and reinforcing fibres of various materials

are the most widely used resin types for aerospace adhesive and composite applications

do not react with the solvents and dopes used for fabric coverings

the material’s has dielectric properties for manufacturing

the original

strength

strain hardening

Strain hardening

delamination

●Tap test ●Ultrasonic inspection ●Radiography/ X ray ●Vibration method and ●Thermal imaging

Structural Repair Manual

for the structure

●Tensile ●Shear ●Cleavage and ●Peel

is the name of the ability to support load without breaking

is the ability of a material to withstand impact without shattering

is the ability of a material to support a load without bending too much

warp

is a standard soda glass in common use for windows , etc

is high resistance to corrosive materials. It is normally produced and used only as a surface matt

of glass

do not resist flame well and burn through more quickly than other fibres

are made from pure carbon and are black in colour

high temperature application is required ,e.g. a firewall

to150˚C

strings or by use of fabric adhesives

is a simple structure built-up from layers of cloth impregnated with resin

animal or vegetable products and coal or petroleum by-products

Tufnol

Sitka Spruce

Spruce

rate should be more than 6 rings per inch(25 mm)

fitting steel bushes

annular rings

this may indicate glue deterioration

soaking or steaming wood strips

surface contamination with oil, wax or silicone products

durability to adhesion

covered with tape

60 Ib

blush

is the only inspection method for identifying excess tension in aircraft fabric covering

usually caused by excessive dope film on new covering

direct combination of a metal with the oxygen in the atmosphere

increase with an increase in temperature

the anode always corrodes

the bottom of the crevice

microbiological corrosion is a present danger

incorrect heat treatment

are not susceptible to intergranular corrosion

is a microbial fungal growth in kerosene fuel

often cannot be detected and has no visual surface indication

can be recognized on aluminum alloys by the appearance of grayish powder fuzzy

non-porous

high temperatures

intergranular

attack along the grain boundaries, or immediately adjacent to grain boundaries

X-ray inspection

corrosion due to fretting

is another name for electrolytic, electro‑chemical or dissimilar metal corrosion

localized damage to protective coating

contact between two dissimilar metals

biological organisms

is NOT one of the conditions for corrosion to occur