A Study on the Microstructures and Properties of Selective Laser Melted Babbitt Metals

Babbitt metal cubes were prepared by means of selected laser melting (SLM) process using Sn—11% Sb—6% Cu alloy powders; their microstructures were studied using optical microscope (OM), SEM, EDS, XRD and DSC; and their mechanical properties were tested using Vickers hardness and tensile methods. The...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials engineering and performance 2019-09, Vol.28 (9), p.5433-5440
Main Authors: Zhao, Xingke, Lai, Rui, Hai, Xusheng
Format: Article
Language:English
Subjects:
ALLOYS
Characterization and Evaluation of Materials
Chemistry and Materials Science
COPPER
Corrosion and Coatings
Engineering Design
LASERS
MATERIALS SCIENCE
MELTING
MICROSTRUCTURE
OPTICAL MICROSCOPES
Quality Control
Reliability
Safety and Risk
SCANNING ELECTRON MICROSCOPY
SCANNING LIGHT MICROSCOPY
SOLID SOLUTIONS
TENSILE PROPERTIES
Tribology
VICKERS HARDNESS
X-RAY DIFFRACTION
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Babbitt metal cubes were prepared by means of selected laser melting (SLM) process using Sn—11% Sb—6% Cu alloy powders; their microstructures were studied using optical microscope (OM), SEM, EDS, XRD and DSC; and their mechanical properties were tested using Vickers hardness and tensile methods. The results show that fully dense Babbitt metal components can be prepared by using appropriate SLM process parameters and an interlayer staggered laser scanning strategy. Anisotropy characteristics appear in both the microstructure and mechanical properties of SLM-Babbitt cubic specimens. The average hardness was in the range of 32.5 HV0.05 to 35.3 HV0.05. Both tensile strength and elongation were somewhat higher in a direction parallel to the laser scanning speed (Y axis) than in a direction perpendicular to the laser scanning speed (X axis). The strengthening mechanism is suggested to include solid solution strengthening of oversaturated Sb in the Sn matrix, as well as dispersion strengthening of finely dispersed SnSb and Cu 6 Sn 5 particles. The overgrown acicular Cu 6 Sn 5 phases at low laser scanning speeds and void formation at higher laser scanning speeds seriously deteriorate the mechanical properties of the SLM-Babbitt specimens.
ISSN:1059-9495
1544-1024
DOI:10.1007/s11665-019-04332-4