Observation of Microstructures in a Light-Optical Microscope.
1. What is the standard etchant used for observing the microstructure of plain carbon steel?
2. What two phases would you expect to see in the microstructure of a slowly cooled hypoeutectoid steel?
3. Which of the following image is a structure of ‘annealed’ condition of a 0.45 %C hypoeutectoid steel?
4. The distinguishing microstructural feature of nodular cast iron (or ductile iron) is the presence of:
5. The matrix microstructure of as-cast nodular iron can consist of:
6. For brass with approximately 40% zinc (Muntz metal), what is the typical microstructure at room temperature?