Investigations on strength and ductility of base metals and welded joints of steels for power plants at elevated temperatures |
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Authors: | W. Dahl C. Kalwa |
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Abstract: | Dynamic strain aging can appear at low alloyed ferritic steels and their welded joints. It influences the strength as well as toughness of the steels. It causes a relative maximum of impact energy at temperatures around 300°C. It also causes a distinct dependence of the strain rate on the shape of crack resistance curves. A lower slope of JR-curves is to be found at higher deformation rates. The technical initiation JIc has a relative minimum in the range between 200 and 300°C. |
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