Skip to main content

LUP Student Papers

LUND UNIVERSITY LIBRARIES

Development and Validation of Process Parameters for Selective Laser Melting

Söderhjelm, Carl (2013) In Diploma work FKM820 20131
Mechanics
Abstract
The possibility to print out metallic components with complex 3D-structures is could revolutionize the industry. In this master’s thesis the cause of process parameters have been investigated for three alloys; stainless steel, 316L, two nickel-based alloys, a derivative of Alloy 738 and 939. Microstructure, porosity, tensile testing, impact toughness, hardness and surface roughness was investigated for 316L. For alloy 738 and alloy 939 the porosity and the crack density was investigated. From the results process maps were created.

It is possible to manufacture stainless steel components with very low porosity. The variations in the mechanical properties tested between the samples is very small also for a large change in process... (More)
The possibility to print out metallic components with complex 3D-structures is could revolutionize the industry. In this master’s thesis the cause of process parameters have been investigated for three alloys; stainless steel, 316L, two nickel-based alloys, a derivative of Alloy 738 and 939. Microstructure, porosity, tensile testing, impact toughness, hardness and surface roughness was investigated for 316L. For alloy 738 and alloy 939 the porosity and the crack density was investigated. From the results process maps were created.

It is possible to manufacture stainless steel components with very low porosity. The variations in the mechanical properties tested between the samples is very small also for a large change in process parameters. This means that the process window for the stainless steel is large and the process is stable for the parameters tested.

For alloy 738 and 939 it was possible to manufacture samples with low porosity but not without cracks. To be able to optimize the process parameters the crack density was measured. No crack free sample was manufactured. However alloy 939 shows much less cracking compared to alloy 738. (Less)
Please use this url to cite or link to this publication:
author
Söderhjelm, Carl
supervisor
organization
alternative title
Utveckling och validering av processparametrar för friformställning med lasersmältning
course
FKM820 20131
year
type
H2 - Master's Degree (Two Years)
subject
publication/series
Diploma work
report number
ISRN LUTFD2/TFMT --13/5041 --SE
ISSN
ISRN
funder
Siemens Industrial Turbomachinery AB
language
English
id
3918324
date added to LUP
2013-07-05 13:15:18
date last changed
2013-07-05 13:15:18
@misc{3918324,
  abstract     = {The possibility to print out metallic components with complex 3D-structures is could revolutionize the industry. In this master’s thesis the cause of process parameters have been investigated for three alloys; stainless steel, 316L, two nickel-based alloys, a derivative of Alloy 738 and 939. Microstructure, porosity, tensile testing, impact toughness, hardness and surface roughness was investigated for 316L. For alloy 738 and alloy 939 the porosity and the crack density was investigated. From the results process maps were created.

It is possible to manufacture stainless steel components with very low porosity. The variations in the mechanical properties tested between the samples is very small also for a large change in process parameters. This means that the process window for the stainless steel is large and the process is stable for the parameters tested.

For alloy 738 and 939 it was possible to manufacture samples with low porosity but not without cracks. To be able to optimize the process parameters the crack density was measured. No crack free sample was manufactured. However alloy 939 shows much less cracking compared to alloy 738.},
  author       = {Söderhjelm, Carl},
  issn         = {ISRN},
  language     = {eng},
  note         = {Student Paper},
  series       = {Diploma work},
  title        = {Development and Validation of Process Parameters for Selective Laser Melting},
  year         = {2013},
}