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Nanoindentation continuous stiffness measurement has been used to study the hydrogen effect on deformation in stable 310S and metastable 304 stainless steels at room temperature. Both stainless steels are gaseous hydrogen-charged. It is first found that the extent of hydrogen effect on the mechanical property is dependent on the deformation stage. Hydrogen decreases the elastic modulus and increases...
Duplex stainless steels are not easily formable due to the different deformation behaviour of austenite and ferrite. The seamless tube making process cold pilgering provides deformation conditions that enable enormous plastic strains at room temperature. The favourable stress state makes axial elongations of 400 to 600% at cross-sectional reductions of about 80% possible for hollows made of Super...
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