Make a copy of the isothermal transformation diagram for an iron???carbon alloy of eutectoid composition (Figure) and then sketch and label time???temperature paths on this diagram to produce the following microstructures:

(a) 100% fine pearlite

(b) 100% tempered martensite

(c) 50% coarse pearlite, 25% bainite, and 25%martensite

Transcribed Image Text:

800 Eutectoid temperature 1400 700 1200 600 1000 500 800 400 300 600 M(start) 200 50% M+A 400 M(50%) M190%) 100 200 10-1 102 103 10 104 105 Time (s) Temperature (C) Temperature ("F)