Engineering Board Exam Reviewer · Engineering Materials · medium
Strengthening a metal by plastic deformation at room temperature is called:
- Precipitation hardening
- Strain hardening (work hardening, cold working)
- Solid solution strengthening
- Quench hardening
Answer
B. Strain hardening (work hardening, cold working)
Solution
Dislocation density increases, impeding further dislocation motion.
More Engineering Materials questions
- Prolonged heating of pearlitic steel just below the eutectoid temperature produces a very soft structure called:
- Isothermal transformation of austenite at temperatures between those forming pearlite and martensite produces:
- The ability of a steel to be hardened to a depth by quenching is called:
- The diagram that shows the time needed for austenite to transform at a constant temperature is the:
- Reheating quenched (martensitic) steel to a temperature below the eutectoid temperature to reduce brittleness is called:
- Rapid cooling of steel from the austenite region in water, oil or brine is called:
- Heating steel into the austenite region and cooling it in still air is called:
- Heating steel into the austenite region and cooling it slowly in the furnace is called:
- A steel with less than 0.76% carbon is called a:
- The very hard, brittle microconstituent formed by rapidly quenching austenite is: