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Metallurgy gary g > FINAL > Flashcards

FINAL Flashcards

1
Q

Common forms of atomic bonding:

A

Covalent bonding
Ionic bonding
Metallic bonding

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2
Q

A subatomic particle with a neutral electrical charge

A

Either electron or neutron…

Find the answer

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3
Q

A type of atomic bonding that occurs in a solid metal when valence electrons leave individual atoms and are shared between all atoms in a free electron cloud

A

Metallic bonding

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4
Q

Substance consisting of atoms of only one type. May be a solid liquid or gas.

A

Element

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5
Q

A configuration of atoms, common to metals, as they add to one another in an orderly and repeating three dimensional pattern.

A

Crystal structure

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6
Q

Crystal structures common to metals:

A

Face centered cubic
Close packed hexagonal
Body centered cubic

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7
Q

The crystal structure associated with delta iron, chromium, tungsten and vanadium:

A

Close packed hexagonal

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8
Q

One of the most common microstructural measurements:

A

Grain size

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9
Q

An austenite transformation product that forms when austenite is COOLED RAPIDLY, resulting in no time for the carbon to diffuse and form pearlier structures.

A

It’s either..

Cementite
Martensite
Austenite

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10
Q

A compound of iron and carbon referred to as iron carbide

A

Ce entire

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11
Q

A lamellar aggregate of ferrite and cementite formed from the eutectoid decomposition of austenite during SLOW COOLING

A

Pear lite

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12
Q

Common families of stainless steels consist of:

A

Cast, ferritic, precipitation hardening

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13
Q

Aluminums main ingredient

A

Bauxite

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14
Q

The largest and most widely used family of stainless steels. They have excellent corrosion resistance, weldability, high-temp. Strength, and low-temp toughness and are generally no magnetic

A

Austeniticstainless

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15
Q

Are the least corrosion resistant family of stainless steels but are known for high levels of strength and abrasion resistance

A

Mertensitic stainless

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16
Q

A metal designation system consisting of 3 numbers sometimes followed by a letter, such as 304, 304L and 410 stainless steels

A

AISI

17
Q

Cast stainless steel structures can be:

A

Martensitic
Ferritic
Austenitic and duplex

18
Q

Similar to other metal applications, the desired metallurgical structures of stainless steels are influenced by:

A

Alloying elements

19
Q

A stainless steel that has a 2 phase microstructure consisting of ferrite and austenite

A

Duplex stainless

20
Q

The precipitation of chromium carbide in austenitic stainless steels. Occurs during operations such as welding or stress relieving. Can severely reduce corrosion resistance.

A

Sensitization

21
Q

A key characteristic for a steel to be considered stainless:

A

Increased immunity to corrosion

22
Q

The state of matter which exhibits the least amount of energy is:

A

Solid

23
Q

A problem occurring in weldments caused by the non-uniform heating produced by the welding operation is:

A

Distortion

24
Q

A family of stainless steel zit that can be heat treated to higher rank than any other Steals and are used in critical high strength applications where resistance to fracture propagation is of extreme importance

A

Precipitation hardening stainless

25
Q

Principal element influencing the corrosion resistance of stainless steel

A

Chromium

26
Q

Adding concentrations of Blank or more of chromium to iron or steel makes the material stainless

A

12%

27
Q

A film on the outer surface layer of a stainless steel that has a superior corrosion resistance

A

Passive surface film

28
Q

Family of stainless steel zit that contains more chromium than martensitic Stainless steel and is strongly ferromagnetic

A

Martensitic stainless

29
Q

Properties commonly considered for this selection of aluminum as a material

A

Low density, high strength to weight ratio, high thermal conductivity

30
Q

Grade of aluminum consisting of manganese as the principal alloying element

A

3xxx

31
Q

Grade of Eminem consisting of 99% minimum aluminum as the principal alloying element

A

1xxx

32
Q

This series of alloy is most often used in making welding electrodes and filler metals

A

4340

4xxx

33
Q

Alloying Element that substantially lowers the melting point of the aluminum alloy

A

Silicone

34
Q

Alloy that improves the machine ability of aluminum alloys

A

Tin

35
Q

Alloying element That improves the weld ability of aluminum alloys

A

Magnesium

36
Q

Form of corrosion that includes a selective attack of one Metal when it is electrically Coupled with To another metal in a conductive environment

A

Galvanic corrosion

37
Q

Aluminum and aluminum alloys are strengthened by

A

Precipitation hardening, solid solution or dispersion hardening, Cold working

38
Q

Common grojan resistant treatment used for aluminum

A

? Anodizing or cladding

Metallurgy gary g (5 decks)

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