ENGM 445 Mid Term Study Set (Chapter
11)
Study online at https://quizlet.com/_cvy9b6
1. What is casting? A manufacturing process where liquid metal is
poured into a mold which has a hollow cavity
of the desired shape and allowed to solidify.
2. What are some of the
advantages and disadvantages Pros: Can create complex part geometries and
of the casting process? external and internal shapes, can product very
large parts, can be used in mass production.
Cons: Limitations on mechanical properties,
poor di- mensional accuracy/surface in some
3. What factors determine (sand casting), safety hazard to workers, and
pouring success?
environmental problems.
4. Properties of solidified alloy are
de- pendent on: Pouring temperature, pouring rate, turbulence.
Composition, grain size, shape, and distribution of
phases.
5. To allow for shrinkage that occurs in
Oversized. the metal during solidification
and shrinkage, the size of the mold cav-
ity must be made which of the
fol- lowing: (a) oversized or (b)
under- sized?
6. A factory that performs casting
op- erations is called which one Foundry.
of
the following: (a) casting plant,
(b) foundry, (c) ingot-making
plant, (d) metal working plant, or
(e) molding plant?
7. Turbulence during pouring of
the molten metal is
undesirable for
1/
9
, ENGM 445 Mid Term Study Set (Chapter
11)
Study online at https://quizlet.com/_cvy9b6
which two of the following It increases erosion of the mold surfaces and it
reasons: increas- es the formation of metallic oxides that
(a) it causes discoloration of the can become entrapped during solidification.
mold surfaces, (b) it dissolves
the binder used to hold together
the sand mold, (c) it increases
erosion of the mold surfaces, (d)
it increases the formation of
metallic oxides that can become
entrapped during so- lidification,
(e) it increases the mold filling
time, and (f) it increases total
solidification time?
8. During solidification of an alloy
when a mixture of solid and liq- Mushy zone.
uid metals is present, the solid-
liq- uid mixture is referred to as
which one of the following: (a)
eutectic composition, (b) ingot
segregation,
(c) liquidus, (d) mushy zone, or
(e) solidus?
9. Macroscopic segregation: When the elements of a mixture don't completely
dif-
fuse.
10. What are the three kinds
of macro-segregation? Normal, inverse, and gravity segregation.
11. Normal segregation: When plane-front solidification drives the lower-
melt- ing constituent towards the center.
12. Inverse segregation: Typical of solid solution alloys with a dendritic
solidifi- cation pattern. Dendrite arms form first
and have lower alloying element concentration,
hence, the interden-
2/
9
11)
Study online at https://quizlet.com/_cvy9b6
1. What is casting? A manufacturing process where liquid metal is
poured into a mold which has a hollow cavity
of the desired shape and allowed to solidify.
2. What are some of the
advantages and disadvantages Pros: Can create complex part geometries and
of the casting process? external and internal shapes, can product very
large parts, can be used in mass production.
Cons: Limitations on mechanical properties,
poor di- mensional accuracy/surface in some
3. What factors determine (sand casting), safety hazard to workers, and
pouring success?
environmental problems.
4. Properties of solidified alloy are
de- pendent on: Pouring temperature, pouring rate, turbulence.
Composition, grain size, shape, and distribution of
phases.
5. To allow for shrinkage that occurs in
Oversized. the metal during solidification
and shrinkage, the size of the mold cav-
ity must be made which of the
fol- lowing: (a) oversized or (b)
under- sized?
6. A factory that performs casting
op- erations is called which one Foundry.
of
the following: (a) casting plant,
(b) foundry, (c) ingot-making
plant, (d) metal working plant, or
(e) molding plant?
7. Turbulence during pouring of
the molten metal is
undesirable for
1/
9
, ENGM 445 Mid Term Study Set (Chapter
11)
Study online at https://quizlet.com/_cvy9b6
which two of the following It increases erosion of the mold surfaces and it
reasons: increas- es the formation of metallic oxides that
(a) it causes discoloration of the can become entrapped during solidification.
mold surfaces, (b) it dissolves
the binder used to hold together
the sand mold, (c) it increases
erosion of the mold surfaces, (d)
it increases the formation of
metallic oxides that can become
entrapped during so- lidification,
(e) it increases the mold filling
time, and (f) it increases total
solidification time?
8. During solidification of an alloy
when a mixture of solid and liq- Mushy zone.
uid metals is present, the solid-
liq- uid mixture is referred to as
which one of the following: (a)
eutectic composition, (b) ingot
segregation,
(c) liquidus, (d) mushy zone, or
(e) solidus?
9. Macroscopic segregation: When the elements of a mixture don't completely
dif-
fuse.
10. What are the three kinds
of macro-segregation? Normal, inverse, and gravity segregation.
11. Normal segregation: When plane-front solidification drives the lower-
melt- ing constituent towards the center.
12. Inverse segregation: Typical of solid solution alloys with a dendritic
solidifi- cation pattern. Dendrite arms form first
and have lower alloying element concentration,
hence, the interden-
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9
