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380                                             Chapter 8  Fracture of Cracked Members


                                          σ   = 820 MPa
                                           o
                                    150


                                 K   , MPa  m  Ic  Charpy Energy, J  100  K Ic  Charpy




                                     50




                                      0
                                       -100   -50     0     +50   +100
                                                          o
                                                Temperature,   C
            Figure 8.38 Comparison of temperature-transition behaviors for K Ic and Charpy tests
            on a 2.25Cr-1Mo steel. (Adapted from [Marandet 77]; copyright c   ASTM; reprinted
            with permission.)


































            Figure 8.39 Effect of sulfur content on the fracture toughness of AISI 4345 steel.
            (From [Wei 65]; copyright c   ASTM; reprinted with permission.)
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