Discontinuous yielding with remarkable Lüders deformation in a duplex stainless steel during tensile deformation at 77 K

Ming Chen, Wenlong Deng,MengMeng Wang,Jiansheng Li,Shilong Xing

Materials Science and Engineering: A（2023）

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摘要

Duplex stainless steels with ultrafine- or fine-grained microstructures showed pronounced discontinuous yielding and Lüders banding behavior during tensile deformation at 77 K. In particular, sample with high-stability "eye"-shaped structures and ultrafine grains exhibited a yield strength of 1750 MPa, a yield drop of 87 MPa and a Lüders strain of 0.23.

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关键词

Duplex stainless steel, Discontinuous yielding, Scanning electron microscopy (SEM), Electron backscattering diffraction (EBSD)

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