AMCR MODULE 3 Flashcards

1
Q

The term ________ refers to all metals which have elements other than iron as their
base or principal constituent. This group includes such metals as aluminum, titanium,
copper, and magnesium, as well as such alloyed metals as Monel and Babbitt.

A

Non-Ferrous

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2
Q

is a white lustrous metal which stands second in the
scale of malleability, sixth in ductility, and ranks high in its resistance to corrosion.

A

Pure Aluminum

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3
Q

the principal alloying ingredients are manganese, chromium,
or magnesium and silicon show little attack in corrosive environments.

A

Aluminum Alloys

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4
Q

Alloys in which
substantial percentages of copper are used are more?

A

susceptible to corrosive action

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5
Q

The total percentage of alloying elements is seldom more than _____ percent in the
wrought alloys.

A

6 or 7%

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6
Q

one of the most widely used metals in modern aircraft construction. It is
vital to the aviation industry because of its high strength to weight ratio and its
comparative ease of fabrication. The outstanding characteristic of it is its light
weight.

A

Aluminum

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7
Q

Aluminum melts at the comparatively low temperature of ___?

A

1,250 °F

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8
Q

The various types of aluminum

A

Casting Alloys and Wrought Alloys

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9
Q

(those suitable for casting in
sand, permanent mold, or die castings)

A

Casting Alloys

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10
Q

(those which may be shaped
by rolling, drawing, or forging).

A

Wrought Alloys

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11
Q

Aluminum alloy castings are produced by one of
three basic methods:

A

(1) sand mold,
(2) permanent mold, or
(3) die cast.

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12
Q

In ________, it must be remembered that in
most cases different types of alloys must be used
for different types of castings

A

casting aluminum

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13
Q

require different
types of alloys than those used in permanent
molds.

A

Sand casting or sand die castings

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14
Q

are used to obtain higher
mechanical properties, better surfaces, or more
accurate dimensions.

A

Permanent mold castings

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15
Q

two specific types of permanent mold
castings:

A

(1) permanent metal mold with metal cores, and
(2) semi-permanent types containing sand cores.

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16
Q

Two Types of Wrought Alloys

A

non-heat-treatable alloys and heat-treatable
alloys.

17
Q

are those in which the
mechanical properties are determined by the
amount of cold work introduced after the final
annealing operation.

A

Non-heat-treatable Alloys

18
Q

the mechanical properties are obtained by heat treating
to a suitable temperature, holding at that
temperature long enough to allow the alloying
constituent to enter into solid solution, and then
quenching to hold the constituent in solution.

A

Heat Treatable Aluminum Alloy

19
Q

are designated by a four-digit index system. The
system is broken into three distinct groups: 1xxx
group, 2xxx through 8xxx group, and 9xxx group
(which is currently unused).

A

Wrought aluminum and wrought aluminum alloys

20
Q

The first digit of a designation identifies the (aluminum)

A

alloy type

21
Q

The second digit indicates (aluminum)

A

specific alloy
modifications

22
Q

Should the second number be zero, it
would indicate no special control over individual
________. (aluminum)

A

impurities

23
Q

Digits 1 through 9, however, when
assigned consecutively as needed for the second
number in this group, indicate the number of? (aluminum)

A

controls over individual impurities in the metal.

24
Q

1100—99.00 percent

A

pure aluminum
with one control over individual
impurities.

25
Q

1130—99.30 percent

A

pure aluminum
with one control over individual
impurities.

26
Q

1275—99.75 percent

A

pure aluminum
with two controls over individual
impurities.

27
Q

In the 2xxx through 8xxx groups, the first digit indicates
the major alloying element used in the formation of the
alloy as follows:

A

➢ 2xxx—copper
➢ 3xxx—manganese
➢ 4xxx—silicon
➢ 5xxx—magnesium
➢ 6xxx—magnesium and silicon
➢ 7xxx—zinc
➢ 8xxx—other elements

28
Q

In the 2xxx through 8xxx alloy groups, the second digit
in the alloy designation indicates

A

Alloy Modifications

29
Q

If the second digit is zero, it indicates the? (2xxx-8xxx)

A

Original Alloy

30
Q

digits 1 through 9 indicate (2xxx-8xxx)

A

Alloy Modifications

31
Q

The last two of the four digits in the designation identify
the (2xxx-8xxx)

A

different alloys in the group

32
Q
A