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Build Strategy and Influence of Oxygen Content on Strength and Impact Properties Anistropy
Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
2020 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The project aims to distinguish the mechanical properties of the powder bed and the printed material for Maraging steel (1.2709) in a powder bed fusion (PBF-L) process. The specimens will process in a 3Dsystems Prox300 equipment. The powder bed properties are unknown factors and are vital as it provides the conditions for the optical interaction with the laser beam, and this controls heat absorption. The samples are Fractured for testing impact strength, and then the specimen is tested for other mechanical properties to see the influence of the build parameters on it. The results from the experimental works show the oxygen content in the powder bed is predefined, and the influence of the build parameters on the mechanical properties. The microstructure and SEM tests are performed to investigate the ductile behavior of the printed sample and defects like porosity influence concerning build parameters. The Hexagonal build strategy mainly influences the porosity. The mechanical properties like Hardness, Surface texture, Impact strength are discussed concerning various build parameters like Hatch Spacing and degree of interlayer rotation. The gas content test is performed to check out the influence to build parameters. Also, the impact strength of the specimen is discussed with build direction as the sample shows anisotropic behavior. The analysis indicates that the build direction of the sample has less impact strength compared to the other sides.

Place, publisher, year, edition, pages
2020. , p. 87
Keywords [en]
Additive Manufacturing, Scan speed
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:hj:diva-50700ISRN: JU-JTH-PRU-2-20200219OAI: oai:DiVA.org:hj-50700DiVA, id: diva2:1471061
Subject / course
JTH, Product Development
Supervisors
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Available from: 2020-09-28 Created: 2020-09-28 Last updated: 2020-09-28Bibliographically approved

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Yepuri, Hrushi KailashHospalya Shashidhar, Akash Chikke Gowda
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CiteExportLink to record
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