Effect of layer thickness on spatters oxidation of Hastelloy X alloy during powder bed fusion-laser beam processing
Artikel i vetenskaplig tidskrift, 2023

This study investigates the impact of powder layer thickness on spatter generation and oxidation behavior during the processing of Hastelloy X. In-situ monitoring using optical tomography reveals that thicker powder layers result in a higher number of hot spatters generated during laser-melt-powder interaction. Scanning electron microscopy and Auger electron spectroscopy analysis demonstrate the presence of different types of spatters that oxidize differently depending on their origin. X-ray photoelectron spectroscopy analysis further shows that the surface enrichment of oxide-forming elements such as Al, Ti, Cr, and Fe varies with the type of spatter particle. Additionally, depth profile analysis using X-ray photoelectron spectroscopy indicates that the average oxide layer thickness increases from ∼2.5 nm in virgin to ∼68 nm in spatters generated at 150 μm powder layer thickness. The findings suggest that powder layer thickness is a crucial factor in controlling spatter generation and oxidation behavior during powder bed fusion-laser beam processing.

Oxidation

XPS

AES

In-situ monitoring

Spatters formation

Författare

Ahmad Raza

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Claudia de Andrade Schwerz

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Camille Nicole Géraldine Pauzon

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Université Grenoble Alpes

Lars Nyborg

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Eduard Hryha

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Powder Technology

0032-5910 (ISSN) 1873-328X (eISSN)

Vol. 422 118461

Additive Manufacturing using Metal Pilot Line (MANUELA)

Europeiska kommissionen (EU) (EC/H2020/820774), 2018-10-01 -- 2022-09-30.

Ämneskategorier

Bearbetnings-, yt- och fogningsteknik

Materialkemi

Annan fysik

Styrkeområden

Materialvetenskap

DOI

10.1016/j.powtec.2023.118461

Mer information

Senast uppdaterat

2023-04-13