Effect of Alloying Composition on Microstructure and Mechanical Properties of Ultranarrow Gap Welded Joints of U71Mn Rail Steel

Figure 8

The macromorphology of impact fracture of the notch at different temperatures in the center of the weld. (a) 20°C, (b) 0°C, (c) −20°C, (d) −40°C, (e) −60°C, and (f) −80°C.

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(b)

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(f)