Unformatted text preview: for an iron-carbon alloy of eutectoid composition (Figure 10.17) because by the time a cooling curve has passed into the bainite region, the entirety of the alloy specimen will have transformed to pearlite. 10.24 This problem asks for the microstructural products that form when specimens of a 4340 steel are continuously cooled to room temperature at several rates. Figure 10.20 is used for these determinations. (a) At a cooling rate of 10 ° C/s, only martensite forms. (b) At a cooling rate of 1 ° C/s, both martensite and bainite form. (c) At a cooling rate of 0.1 ° C/s, martensite, proeutectoid ferrite, and bainite form....
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- continuous cooling transformation