Multilayer materials (1.2–0.25 mm thick) are produced by sintering in a container at 850°C and cold rolling of ten-layer briquettes of commercially pure iron. It is shown that the tensile strength of the materials studied is proportional to the total true strain value by rolling and reaches 1400 MPa at percentage extension 1%. Endurance limit increases up to 670 MPa. With increasing strain degree by rolling, the structural elements inside layers reduce in size, when high interlayer strength between macro layers. The best correlation of endurance limit of materials with micro yield strength is observed, when 0.01% of residual strain.
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Translated from Poroshkovaya Metallurgiya, Vol. 56, Nos. 5–6 (515), pp. 10–19, 2017.
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Lugovskoi, Y.F., Podrezov, Y.N., Nazarenko, V.A. et al. Mechanical Properties and Fracture Mechanisms of Commercially Pure Multilayer Iron Produced by Strip Joint Rolling. Powder Metall Met Ceram 56, 245–252 (2017). https://doi.org/10.1007/s11106-017-9892-6
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DOI: https://doi.org/10.1007/s11106-017-9892-6