MSE 280 final | Questions with 100% Verified Answers |
Latest Update
Question:
What are typical properties of metals?
Answer:
Shiny, strong, ductile, relatively high melting point (lower than ceramics, higher than polymers),
relatively high stiffness, dense, many prone to corrosion
Question:
What is the difference between a wrought and cast metal?
Answer:
Usually metal is cast - melted and poured into a shape. Wrought steel is also deformed during
processing. Both can be machined (and mostly are!!!)
Question:
What is the definition of a ferrous alloy?
Answer:
It is made primarily of iron
Question:
What is a steel?
Answer:
Alloy of iron and carbon that DOES NOT solidify as a eutectic (below about 2.1 wt% carbon). Base
alloy (without significant alloying) is BCC
Question:
How is most steel produced?
Answer:
Continuous casting
Question:
Why is steel the most recycled material in the world?
Answer:
Most is magnetic, easy to separate
Question:
What is the most common metal used (by far)?
Answer:
, steel
Question:
Why is steel so common?
Answer:
It is cheap, it has outstanding fracture toughness, it's complicated - in other words, you can alloy it
and heat treat it and get widely different properties. You can make ultra high strength steel and
softer, ductile steel. You can alloy it for corrosion resistance. You can alloy it to make it fcc instead
of bcc. (FCC more ductile and no DBTT). It has a high operating temperature and a high modulus.
Question:
How can you minimize corrosion in steel?
Answer:
Alloying (around 11-12% Cr), paint, galvanizing (coat with zinc-aluminum)
Question:
What is the most common numerical system for steels (except high alloy steels)?
Answer:
XYY or XXYYY; first two numbers indicate main alloying elements, second two or three numbers
indicate the carbon concentration times 100.
Question:
What is cast iron
Answer:
alloy of iron, carbon and most always silicon (for added fluidity)
Question:
What are the major differences between steel and cast iron?
Answer:
Silicon higher, carbon higher, always solidifies with some eutectic, never deformed into shape-
always cast.
Question:
What are the main forms of cast iron?
Answer:
Ductile (aka spheroidal), gray, white, compacted graphite (CG)
Question:
What is the main difference between the forms of cast iron?
Latest Update
Question:
What are typical properties of metals?
Answer:
Shiny, strong, ductile, relatively high melting point (lower than ceramics, higher than polymers),
relatively high stiffness, dense, many prone to corrosion
Question:
What is the difference between a wrought and cast metal?
Answer:
Usually metal is cast - melted and poured into a shape. Wrought steel is also deformed during
processing. Both can be machined (and mostly are!!!)
Question:
What is the definition of a ferrous alloy?
Answer:
It is made primarily of iron
Question:
What is a steel?
Answer:
Alloy of iron and carbon that DOES NOT solidify as a eutectic (below about 2.1 wt% carbon). Base
alloy (without significant alloying) is BCC
Question:
How is most steel produced?
Answer:
Continuous casting
Question:
Why is steel the most recycled material in the world?
Answer:
Most is magnetic, easy to separate
Question:
What is the most common metal used (by far)?
Answer:
, steel
Question:
Why is steel so common?
Answer:
It is cheap, it has outstanding fracture toughness, it's complicated - in other words, you can alloy it
and heat treat it and get widely different properties. You can make ultra high strength steel and
softer, ductile steel. You can alloy it for corrosion resistance. You can alloy it to make it fcc instead
of bcc. (FCC more ductile and no DBTT). It has a high operating temperature and a high modulus.
Question:
How can you minimize corrosion in steel?
Answer:
Alloying (around 11-12% Cr), paint, galvanizing (coat with zinc-aluminum)
Question:
What is the most common numerical system for steels (except high alloy steels)?
Answer:
XYY or XXYYY; first two numbers indicate main alloying elements, second two or three numbers
indicate the carbon concentration times 100.
Question:
What is cast iron
Answer:
alloy of iron, carbon and most always silicon (for added fluidity)
Question:
What are the major differences between steel and cast iron?
Answer:
Silicon higher, carbon higher, always solidifies with some eutectic, never deformed into shape-
always cast.
Question:
What are the main forms of cast iron?
Answer:
Ductile (aka spheroidal), gray, white, compacted graphite (CG)
Question:
What is the main difference between the forms of cast iron?
