Journal
MATERIALS LETTERS
Volume 214, Issue -, Pages 240-242Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2017.12.040
Keywords
Metals and alloys; Nanocrystalline materials; Annealing; Microstructure; Deformation and fracture
Funding
- Hungarian Scientific Research Fund, OTKA [K 109021]
- European Research Council [267464-SPDMETALS]
- NRF-Fostering Core Leaders of the Future Basic Science Program/Global Ph.D. Fellowship Program [2016H1A2A1909161]
- National Research Foundation of Korea [2016H1A2A1909161] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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An investigation was conducted to evaluate the effect of annealing at different temperatures on the tensile properties of ultrafine-grained 316L stainless steel processed by high-pressure torsion (HPT). A moderate-temperature annealing at 740 K resulted in reduced strength and elongation due to the annihilation of mobile dislocations. A high-temperature annealing at 1000 K yielded a remarkably good combination of yield strength (similar to 1330 MPa) and elongation to failure (similar to 43%) which can be attributed to the almost full reversion of alpha'-martensite formed during HPT into gamma-austenite while the grain size remained very fine with a value of about 200 nm. (C) 2017 Elsevier B.V. All rights reserved.
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