Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7978366 | Materials Science and Engineering: A | 2015 | 24 Pages |
Abstract
Controlled martensitic reversion annealing was applied to a heavily cold-worked metastable austenitic low-Ni Cr-Mn austenitic stainless steel (Type 201) to obtain different ultrafine austenite grain sizes to enhance the mechanical properties, which were then compared with the conventional coarse-grained steel. Characterization of the deformed and reversion annealed microstructures was performed by electron back scattered diffraction (EBSD), X-ray diffraction (XRD) and light and transmission electron microscopy (TEM). The steel with a reverted grain size ~1.5 μm due to annealing at 800 °C for 10 s showed significant improvements in the mechanical properties with yield stress ~800 MPa and tensile strength ~1100 MPa, while the corresponding properties of its coarse grained counterpart were ~450 MPa and ~900 MPa, respectively. However, the fracture elongation of the reversion annealed steel was ~50% as compared to ~70% in the coarse grained steel. A further advantage is that the anisotropy of mechanical properties present in work-hardened steels also disappears during reversion annealing.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
A.S. Hamada, A.P. Kisko, P. Sahu, L.P. Karjalainen,