Multi-material additive manufacturing of steels using laser powder bed fusion

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Abstract

Most commercially available laser powder bed fusion (L-PBF) systems are limited to process one material at a time. The ability to spatially apply multiple materials within the same component will strongly expand the available design space for engineers. A typical problem with multi-material components is stress concentration at discrete material interfaces. Functionally graded interfaces could be used to overcome this limitation. In this work, an open-architecture L-PBF system from Aurora Labs was used to mix and process stainless steel 316L and maraging steel MS1 powder. Thereby, continuous and discrete interfaces between both materials were generated and characterized regarding microstructure, micro-hardness, and elemental composition. An L-PBF process window was found to gradually change the composition of 316L to MS1 creating a continuous interface. The controlled mixing of the powders in each layer indicates the versatility of the powder dispensation setup for multi-material combinations. This contribution will further pave the way towards the development of functionally graded L-PBF components.
Original languageEnglish
Title of host publicationProceedings of the 19th International Conference and Exhibition (EUSPEN 2019)
EditorsC. Nisbet, R. K. Leach , D. Billington, D. Phillips
PublisherThe European Society for Precision Engineering and Nanotechnology
Publication date2019
Pages240-243
ISBN (Electronic)978-099577514-5
Publication statusPublished - 2019
Eventeuspen's 19th International Conference & Exhibition - Bilbao, Spain
Duration: 3 Jun 20197 Jun 2019

Conference

Conferenceeuspen's 19th International Conference & Exhibition
Country/TerritorySpain
CityBilbao
Period03/06/201907/06/2019

Keywords

  • Metal additive manufacturing
  • Multi-material
  • Functionally graded components
  • Adaptive process control
  • MS1
  • 316L

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