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Enhancement of an additive-manufactured austenitic stainless steel by post-manufacture heat-treatment
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Number of Authors: 72019 (English)In: Materials Science & Engineering: A, ISSN 0921-5093, E-ISSN 1873-4936, Vol. 759, p. 65-69Article in journal (Refereed) Published
Abstract [en]

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 degrees 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.

Place, publisher, year, edition, pages
2019. Vol. 759, p. 65-69
Keywords [en]
Additive manufacturing, 316L stainless steel, Heat-treatment, Mechanical properties, Orowan strengthening
National Category
Nano Technology Materials Engineering
Identifiers
URN: urn:nbn:se:su:diva-171097DOI: 10.1016/j.msea.2019.04.111ISI: 000472813900009OAI: oai:DiVA.org:su-171097DiVA, id: diva2:1350109
Available from: 2019-09-10 Created: 2019-09-10 Last updated: 2019-09-10Bibliographically approved

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Shen, ZhijianHuang, Xiaoxu
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Department of Materials and Environmental Chemistry (MMK)
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