Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
3 Cards in this Set
- Front
- Back
|
What type of corrosion may attack the grain boundaries of aluminum alloys when the heat treatment process has been improperly accomplished? ~ An aluminum alloy part is heat-treated by being heated in an oven and then removed and immediately quenched in cold water. If there is a delay between the time the part is removed from the oven and the time it is quenched, the grains in the metal will grow. Because of this, there is a good probability that intergranular corrosion will develop along the boundaries of the grains within the metal. @ An aluminum alloy part is heat-treated by being heated in an oven and then removed and immediately quenched in cold water. If there is a delay between the time the part is removed from the oven and the time it is quenched, the grains in the metal will grow. Because of this, there is a good probability that intergranular corrosion will develop along the boundaries of the grains within the metal. a. Concentration cell. b. Intergranular. c. Fretting. |
Intergranular |
|
|
Which of the following describe the effects of annealing steel and aluminum alloys? ~ Steel and aluminum alloys may be annealed to decrease internal stresses and soften the metal. Annealing does not improve corrosion resistance. @ Steel and aluminum alloys may be annealed to decrease internal stresses and soften the metal. Annealing does not improve corrosion resistance. a. Decreasing internal stresses and softening of the metal. b. Softening of the metals and improved corrosion resistance. c. Improved corrosion resistance. |
Decreasing internal stresses and softening of the metal |
|
|
Which heat-treating process of metal produces a hard, wear-resistant surface over a strong, tough core? ~ Case hardening is a heat treatment process for steel in which the surface is hardened to make it wear resistant, but the inside of the metal remains strong and tough. Annealing is a heat treatment process for either ferrous or nonferrous metal that makes the metal softer. Tempering is a method of heat treatment in which some of the hardness is removed from a hardened metal. Removing some of the hardness makes the metal less brittle. @ Case hardening is a heat treatment process for steel in which the surface is hardened to make it wear resistant, but the inside of the metal remains strong and tough. Annealing is a heat treatment process for either ferrous or nonferrous metal that makes the metal softer. Tempering is a method of heat treatment in which some of the hardness is removed from a hardened metal. Removing some of the hardness makes the metal less brittle. a. Case hardening b. Annealing. c. Tempering. |
Case hardening |
