1)Which of the following statements is true regarding aluminum / aluminum alloys
ID: 493086 • Letter: 1
Question
1)Which of the following statements is true regarding aluminum / aluminum alloys ?
Aluminum alloys are generally considered to be mechanically inferior compared to pure aluminum in terms of yield strength, because their microstructures contain precipitate phases that strain the lattice and therefore soften the alloy relative to pure aluminum.
Aluminum is extremely rare in abundance within the earth's crust.
Aluminum is very resistant to creep, because its ceramic (Al2O3) oxide layer thermally insulates the base metal and prevents grain sliding due to its high degree of adherence to the base metal.
High-strength aluminum alloys that leverage secondary phase hardening are often less resistant to corrosion compared to pure aluminum.
Aluminum and it alloys are extremely difficult to melt, so they are rarely used as materials for casted parts.
Aluminum alloys are generally considered to be mechanically inferior compared to pure aluminum in terms of yield strength, because their microstructures contain precipitate phases that strain the lattice and therefore soften the alloy relative to pure aluminum.
Aluminum is extremely rare in abundance within the earth's crust.
Aluminum is very resistant to creep, because its ceramic (Al2O3) oxide layer thermally insulates the base metal and prevents grain sliding due to its high degree of adherence to the base metal.
High-strength aluminum alloys that leverage secondary phase hardening are often less resistant to corrosion compared to pure aluminum.
Aluminum and it alloys are extremely difficult to melt, so they are rarely used as materials for casted parts.
Which of the following statements is true regarding aluminum / aluminum alloys?Explanation / Answer
option c is correct
Aluminum is very resistant to creep, because its ceramic (Al2O3) oxide layer thermally insulates the base metal and prevents grain sliding due to its high degree of adherence to the base metal.
on Aluminium alloy surfaces develop a white, protective layer of aluminium oxide (Al2O3) if left unprotected by anodizing or correct painting procedures than a wet environment, galvanic corrosion can occur on aluminium surfaces.
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