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The positive influence of microadmixtures of rare-earth metals on the strength, plasticity, impact toughness, and cyclic crack-growth resistance of 17G1S pipe steel is discovered. The decomposition of the impact toughness into the work of crack initiation $$ {a_i} $$ and the work of crack propagation $$ {a_p} $$ made it possible to discover the following specific features in the temperature...
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