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Published in: Physics of Metals and Metallography 14/2021

01-12-2021 | STRENGTH AND PLASTICITY

Effect of Gadolinium Addition on Microstructure, Mechanical Properties and Corrosion Resistance of 316L Austenitic Stainless Steels

Authors: H. Wang, T. Wang, J. Peng

Published in: Physics of Metals and Metallography | Issue 14/2021

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Abstract

316L austenitic stainless steels containing 0.2–2.0 wt % gadolinium (Gd) were prepared through vacuum arc melting and subsequent hot rolling. Submicron and micron-sized Gd-rich phases precipitate along the grain boundaries and inside the grains in the as-cast samples. After hot rolling, the Gd-rich phases of an average size below 3 μm are homogeneously distributed when the Gd content is less than 1.5 wt %. When the Gd content increases to 2.0 wt %, some of the Gd-rich particles coarsen to about 6 μm and tend to aggregate. The hardness monotonously improves from 387 to 442 HV with increasing the Gd content from 0.2 to 2.0 wt % in the hot-rolled samples. The maximum yield strength and tensile strength, 635 and 741 MPa, respectively, were found in the hot-rolled 0.5 wt % Gd sample, which exhibits the optimum corrosion resistance as well.
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Metadata
Title
Effect of Gadolinium Addition on Microstructure, Mechanical Properties and Corrosion Resistance of 316L Austenitic Stainless Steels
Authors
H. Wang
T. Wang
J. Peng
Publication date
01-12-2021
Publisher
Pleiades Publishing
Published in
Physics of Metals and Metallography / Issue 14/2021
Print ISSN: 0031-918X
Electronic ISSN: 1555-6190
DOI
https://doi.org/10.1134/S0031918X21140246