Match the time-temperature cooling paths for a 1080 steel on a TTT diagram that will produce the following microstructures: (1) 100 percent martensite, (2) 50 percent martensite and 50 percent pearlite, (3) 100 percent fine pearlite, (4) 50 percent martensite and 50 percent bainite, and (5) 100 percent lower bainite.
1. Cooling curve (a)
2. Cooling curve (b)
3. Cooling curve (c)
4. Cooling curve (d)
5. Cooling curve (e)
6. Cooling curve (f)
7. Cooling curve (g)
100 percent lower bainite
50 percent martensite and 50 percent bainite
50 percent martensite and 50 percent pearlite
100 percent martensite
100 percent fine pearlite