1.A materials fatigue resistance can be improvedby
| | removing sharp corners in the geometric design of thecomponent |
| | introducing a residual compressive stress on the surfaceof the component. |
| | operating the component at temperatures above itsmelting point |
| | introducing surface flaws to the component |
2.What test is used to determine the toughness of amaterial under shock loading?
| | hardness test |
| | Impact test |
| | compression test |
| | tensile test |
3.Martensite
| | is a phase that consists of lamellar arrangement of ironand cementite |
| | is harder than pearlite |
| | is harder than ferrite |
| | has a high level of ductility |
