Post heat-treatment enhancement of additive manufactured 316L stainless steel

Guilin Wu*, Nan Chen, Andrew Godfrey, Zhijian Shen, Xiaoxu Huang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

29 Downloads (Pure)

Abstract

The effect of heat-treatment on an additively manufactured austenitic stainless steel 316L was investigated in samples annealed at various temperatures. A multi-scale structure was observed in the as-manufactured material, composed of grains, cell blocks and dislocation cells with low boundary misorientation angles, dislocations and nano-sized particles. After annealing for 1 h at 400ºC, a 10% increase in yield strength and little loss of tensile elongation was observed, associated with the formation of nano-sized silicates. With further increase of annealing temperature, the strength was decreased, attributed to thermal instability of the cell structure. The results demonstrate that by careful controlling of annealing conditions the structure and mechanical properties of the additive manufactured austenitic stainless steel can be optimized by post-manufacturing heat-treatment.
Original languageEnglish
Title of host publicationProceedings of the 40th Risø International Symposium on Materials Science: Metal Microstructures in 2D, 3D and 4D
PublisherDTU Mechanical Engineering
Publication date2019
Pages335-342
Publication statusPublished - 2019
Event40th Risø International Symposium on Material Science: Metal Microstructures in 2D, 3D, and 4D - Roskilde, Denmark
Duration: 2 Sep 20196 Sep 2019

Conference

Conference40th Risø International Symposium on Material Science: Metal Microstructures in 2D, 3D, and 4D
CountryDenmark
CityRoskilde
Period02/09/201906/09/2019

Fingerprint Dive into the research topics of 'Post heat-treatment enhancement of additive manufactured 316L stainless steel'. Together they form a unique fingerprint.

Cite this