12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Direct laser deposition with different types of...
View graph of relations

« Back

Direct laser deposition with different types of 316L steel particle: a comparative study of final part properties

Research output: Contribution to journalJournal article

Published

Journal publication date04/2013
JournalProceedings of the Institution of Mechanical Engineers - Part B: Journal of Engineering Manufacture
Journal number4
Volume227
Number of pages12
Pages520-531
Original languageEnglish

Abstract

This paper investigates the role that particle size and morphology have in determining the final characteristics of a part produced by Direct Laser Deposition. Stainless steel 316L in the form of traditional gas-atomised powder or metal shavings in two size ranges were deposited into multiple-layer thin-walled parts at different process parameters. The walls were characterised, considering properties such as geometry, microstructure, composition, physical and corrosive properties. and results matched to the type of build material. Results showed that using particles of > 150 um ESD offered few functional advantages, leading to a process with lower deposition efficiency and part with lower mechanical properties. Using machined shavings increases deposition efficiency and can reduces gas porosity compared with powder in the same size range, but also results in higher surface oxidation, thought to be due to higher oxidation on the original shavings. This is a barrier for some applications, but the deposition of machined shavings offers significant economic advantages.