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Abstract
The effect of post-manufacture heat-treatment on the mechanical strength of an additively-manufactured austenitic stainless steel has been investigated. Microstructural investigations revealed that the as-manufactured material exhibited a multi-scale structure, composed of grains, cells, dislocations and nano-sized particles. Annealing at 400°C resulted in a 10% increase in yield strength, associated with the additional precipitation of a population of nano-sized silicates. Annealing at higher temperatures resulted in a decrease in strength, attributed primarily to the thermal instability of the cell structure in the as-manufactured material. The results demonstrate that by careful control of annealing conditions the structure and mechanical properties of additively-manufactured austenitic stainless steel can be optimized by post-manufacture heat-treatment.
Original language | English |
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Journal | Materials Science and Engineering: A - Structural Materials: Properties, Microstructure and Processing |
Volume | 759 |
Pages (from-to) | 65-69 |
ISSN | 0921-5093 |
DOIs | |
Publication status | Published - 2019 |
Keywords
- 316L stainless steel
- Additive manufacturing
- Heat-treatment
- Mechanical properties
- Orowan strengthening
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Dive into the research topics of 'Enhancement of an additive-manufactured austenitic stainless steel by post-manufacture heat-treatment'. Together they form a unique fingerprint.Projects
- 1 Finished
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M4D: Metal Microstructures in Four Dimensions
Juul Jensen, D. (PI) & Hede, L. G. (Other)
01/10/2018 → 30/09/2023
Project: Research