Test 2

studied byStudied by 8 people
5.0(2)
get a hint
hint

High stiffness and strength

1 / 91

Tags and Description

92 Terms

1

High stiffness and strength

can be alloyed for high rigidity, strength, and hardness

New cards
2

Toughness

capacity to absorb energy better than other classes of materials

New cards
3

Good electrical conductivity

metals are conductors

New cards
4

Good thermal conductivity

conduct head better than ceramics or polymers

New cards
5

Cost

the price of steel is very competitive with other engineering materials

New cards
6

Cast metal

starting form is a casting

New cards
7

Wrought metal

the metal has been worked or can be worked after casting

New cards
8

Powdered metal

starting form is very small powders for conversion into parts using powder metallurgy techniques

New cards
9

Ferrous

Those based on iron, steels, cast irons

New cards
10

Nonferrous

all other metals, aluminum, magnesium, copper, nickel, titanium, zinc, lead, tin, gold, silver

New cards
11

Alloy

a mixture or compound of two or more elements, at least one of which is metallic

New cards
12

The phase of Iron at room temperature

alpha, α, called ferrite

New cards
13

What does ferrite transform to as temperature rises?

Ferrite, alpha, to austenite, gamma, to delta

New cards
14

Steel

an iron-carbon alloy containing from 0.02% to 2.1% carbon

New cards
15

Cast iron

an iron-carbon alloy containing from 2.1% to about 4% or 5% carbon

New cards
16

Ductile iron

is formed by special melting and pouring treatment of gray cast iron

New cards
17

Malleable iron

is formed by heat treatment of white cast iron

New cards
18

THIS IS START OF CH 6 ASSIGNMENT

IGNORE

New cards
19

What are some of the general properties that distinguish metals from ceramics and polymers?

Typical metallic properties include: high strength and stiffness, good electrical and thermal conductivity, and higher density than ceramics or polymers

New cards
20

What are the two major groups of metals? Define them.

Ferrous metals, which are based on iron; and nonferrous, which includes all others.

New cards
21

What is a solid solution in the context of alloys?

A solid solution is an alloy in which one of the metallic elements is dissolved in another to form a single phase.

New cards
22

Distinguish between a substitutional solid solution and an interstitial solid solution.

A substitutional solid solution is where the atoms of the dissolved element replace atoms of the solution element in the lattice structure of the metal. An interstitial solid solution is where the dissolved atoms are small and fit into the vacant spaces (the interstices) in the lattice structure of the solvent metal.

New cards
23

What is an intermediate phase in the context of alloys?

An intermediate phase is an alloy formed when the solubility limit of the base metal in the mixture is exceeded and a new phase, such as a metallic compound (e.g., Fe3C) or intermetallic compound (e.g., Mg2Pb) is formed.

New cards
24

What is the range of carbon percentages that defines an iron‑carbon alloy as a steel?

The carbon content ranges from 0.02% to 2.11%.

New cards
25

What is the range of carbon percentages that defines an iron‑carbon alloy as cast iron?

The carbon content ranges from 2.11% to about 5%.

New cards
26

Identify some of the common alloying elements other than carbon in low alloy steels.

The common alloying elements in low alloy steel are Cr, Mn, Mo, Ni, and V. at least two

New cards
27

What is the predominant alloying element in all of the stainless steels?

Chromium

New cards
28

Besides high carbon content, what other alloying element is characteristic of the cast irons?

Silicon

New cards
29

Identify some of the properties for which aluminum is noted?

Aluminum is noted for its low density, high electrical and thermal conductivity, formability, good corrosion resistance due to the formation of a tough oxide film on its surface, and ability to be alloyed and strengthened to achieve good strength‑to‑weight ratios.

New cards
30

What are some of the noteworthy properties of magnesium?

Magnesium is noted for its very low density (lightest of the structural metals), propensity to oxidize (which can cause problems in processing), and low strength; however, it can be alloyed and strengthened by methods similar to those used for aluminum alloys to achieve respectable strength‑to‑weight ratios

New cards
31

What is the most important engineering property of copper that determines most of its applications?

Its high electrical conductivity (low resistivity).

New cards
32

What elements are traditionally alloyed with copper to form (a) bronze and (b) brass?

The elements are (a) tin and (b) zinc, respectively.

New cards
33

What are some of the important applications of nickel?

The important applications of Ni are (1) as an alloying ingredient in steel, e.g., stainless steel; (2) for plating of steel to resist corrosion; and (3) to form nickel‑based alloys noted for high‑temperature performance and corrosion resistance

New cards
34
New cards
35

What are the noteworthy properties of titanium?

Titanium is noted for its high strength‑to‑weight ratio, corrosion resistance (due to the formation of a thin but tough oxide film), and high temperature strength.

New cards
36

Identify some of the important applications of zinc.

The important applications of Zn are (1) die castings ‑ zinc is an easy metal to cast; (2) as a coating in galvanized steel; (3) as an alloying element with copper to form brass.

New cards
37

What important alloy is formed from lead and tin?

Solder

New cards
38

What is so special about the superalloys? What distinguishes them from other alloys?

The superalloys are generally distinguished by their strength and resistance to corrosion and oxidation at elevated temperatures.

New cards
39

What are the three basic methods by which metals can be strengthened?

The three basic methods are (1) alloying to form solid solutions and two‑phase structures which are stronger than the elemental metals; (2) cold working, in which the strain‑hardened metal is stronger and harder than the unstrained metal; and (3) heat treatment ‑ most of the commercial heat treatments are designed to increase the strength of the metal.

New cards
40

THIS IS START OF CH 21 SLIDES

IGNORE

New cards
41

Machining

a material removal process in which a sharp cutting tool is used to mechanically cut away material so that the desired part geometry remains

New cards
42

Turning

<p></p>
New cards
43

Facing

knowt flashcard image
New cards
44

Contour Turning

instead of feeding tool parallel to axis of rotation, tool follows a contour that is other than straight, thus creating a contoured shape

New cards
45

Chamfering

cutting edge cuts an angle on the corner of the cylinder, former a chamfer

New cards
46

Cutoff

tool is fed radically into rotating work at some location to cut off end of part

New cards
47

threading

pointed form tool is fed linearly across surface of rotating work part parallel to axis of rotation at a large feed rate, thus creating threads

New cards
48

MANUAL LATHE

knowt flashcard image
New cards
49

Reaming

knowt flashcard image
New cards
50

tapping

knowt flashcard image
New cards
51

counterboring

knowt flashcard image
New cards
52

countersinking

knowt flashcard image
New cards
53

center drilling

knowt flashcard image
New cards
54

spot facing

knowt flashcard image
New cards
55

DRILL PRESS

knowt flashcard image
New cards
56

Vertical milling machine

knowt flashcard image
New cards
57

THIS IS START OF CH 6 QUIZ

RECHECK ANSWERS

New cards
58

Sand casting is which of the following types:

expendable mold

New cards
59

The upper half of a sand casting mold is called which of the following:

cope

New cards
60

In foundry work, a runner is which one of the following:

channel in the mold leading from the downsprue to the main mold cavity

New cards
61

A riser in casting is NOT described by which of the following:

an insert in the casting that inhibits buoyancy of the core

New cards
62

Which one of the following casting processes is the most widely used:

sand casting

New cards
63

For which one of the following reasons is a green mold named:

moisture is contained in the mold

New cards
64

Shell molding is best described by which one of the following:

casting process in which the mold is a thin shell of sand binded by a thermosetting resin

New cards
65

Which of the following qualifies as a precision casting process:

investment casting

New cards
66

Which of the following metals would typically be cast in die casting

aluminum

New cards
67

A misrun is which one of the following defects in casting:

metal solidifies before filling the cavity

New cards
68

START OF CH 39 40

New cards
69

The manufacturing engineering department in an organization is best described as which one of the following:

technical staff function

New cards
70

Which of the following is NOT a usual responsibility of the manufacturing engineering department?

marketing the product

New cards
71

Which of the following is considered a basic process, as opposed to a secondary process?

impression die forging

New cards
72

Which of the following would be considered a secondary process, as opposed to a basic process?

machining a metal casting

New cards
73

In a make or buy situation, the decision should always be to purchase the component if the vendor ’s quoted price is less than the in-house estimated cost of the component:

False

New cards
74

Which of the following is an operation to enhance physical properties?

annealing

New cards
75

A route sheet is a document whose principal function is which one of the following?

specifies the process plan

New cards
76

Which one of the following types of computer-aided process planning relies on parts classification and coding in group technology?

retrieval CAPP

New cards
77

Start of Jeopardy

jeopardy

New cards
78

For what is aluminum not noted

poor corrosion resistance. Has good corrosion resistance

New cards
79

CHECK PHOTOS

New cards
80

RANGE OF CARBON PERCENTAGES

New cards
81

the distance the tool advances into or along the workpiece each time the tool point passes a certain position in its travel over the surface is called

Feed

New cards
82

Ch 21 quiz

ch 21 quiz

New cards
83

In a turning operation, the change in diameter of the workpart is equal to which one of the following:

2 x depth of cut

New cards
84

A lathe can be used to perform which of the following machining operations:

boring

New cards
85

A facing operation is normally performed on which one of the following machine tools:

lathe

New cards
86

Knurling is performed on a lathe, but it is a metal forming operation rather than a metal removal operation:

true

New cards
87

Which one of the following cutting tools cannot be used on a turret lathe:

broach

New cards
88

Which one of the following turning machines permits very long bar stock to be used:

screw machine

New cards
89

Reaming is used for which of the following functions:

enlarge a drilled hole

New cards
90

End milling is most similar to which one of the following:

face milling

New cards
91

A planing operation is best described by which one of the following:

a workpart moves linearly past a single-point tool

New cards
92

A broaching operation is best described by which one of the following:

a tool with multiple teeth moves linearly past a stationary workpart

New cards

Explore top notes

note Note
studied byStudied by 20 people
Updated ... ago
5.0 Stars(2)
note Note
studied byStudied by 284 people
Updated ... ago
5.0 Stars(7)
note Note
studied byStudied by 18 people
Updated ... ago
4.3 Stars(3)
note Note
studied byStudied by 5 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 3 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 4 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 9 people
Updated ... ago
5.0 Stars(1)

Explore top flashcards

flashcards Flashcard34 terms
studied byStudied by 8 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard69 terms
studied byStudied by 15 people
Updated ... ago
5.0 Stars(2)
flashcards Flashcard25 terms
studied byStudied by 5 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard32 terms
studied byStudied by 11 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard350 terms
studied byStudied by 45 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard21 terms
studied byStudied by 99 people
Updated ... ago
5.0 Stars(2)
flashcards Flashcard49 terms
studied byStudied by 25 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard254 terms
studied byStudied by 27 people
Updated ... ago
5.0 Stars(1)