Development of 316L-0.3Y2O3 ODS steels by selective laser melting

Oxide-Dispersion-Strengthened (ODS) steel has developed into one of the most promising structural materials for advanced nuclear reactors. However, the traditional preparation method of ODS steel, powder metallurgy (PM), has many problems and defects in the manufacturing process. As such, we attempt...

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Main Author: Liang, Penghui
Other Authors: Zhou Wei
Format: Theses and Dissertations
Language:English
Published: 2019
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Online Access:http://hdl.handle.net/10356/76894
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-768942023-03-11T17:32:25Z Development of 316L-0.3Y2O3 ODS steels by selective laser melting Liang, Penghui Zhou Wei School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering Oxide-Dispersion-Strengthened (ODS) steel has developed into one of the most promising structural materials for advanced nuclear reactors. However, the traditional preparation method of ODS steel, powder metallurgy (PM), has many problems and defects in the manufacturing process. As such, we attempt to use an additive manufacturing technology, selective laser melting (SLM), to print out the desired ODS steel. This dissertation investigated the feasibility of SLM for the preparation of ODS steel. Y2O3 powder (mass fraction: 0.3%) was mixed with 316L stainless steel powder by low-energy ball milling method, and then the mixed metal powder was printed using SLM technology. Besides, the microstructure and mechanical properties of the 316L-0.3Y2O3 ODS steel were investigated in comparison with 316L stainless steel. The obtained show that the printing effect on 316L-0.3 Y2O3 ODS steel is quite good by using SLM technology. In addition, the hardness of ODS steel has also been improved. However, it was also observed that there are more pores in the 316L-0.3 Y2O3 ODS steel as compared with 316L steel, and Y2O3 agglomeration was observed on the top surface.   Master of Science (Mechanical Engineering) 2019-04-22T13:19:27Z 2019-04-22T13:19:27Z 2019 Thesis http://hdl.handle.net/10356/76894 en 59 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Mechanical engineering
spellingShingle DRNTU::Engineering::Mechanical engineering
Liang, Penghui
Development of 316L-0.3Y2O3 ODS steels by selective laser melting
description Oxide-Dispersion-Strengthened (ODS) steel has developed into one of the most promising structural materials for advanced nuclear reactors. However, the traditional preparation method of ODS steel, powder metallurgy (PM), has many problems and defects in the manufacturing process. As such, we attempt to use an additive manufacturing technology, selective laser melting (SLM), to print out the desired ODS steel. This dissertation investigated the feasibility of SLM for the preparation of ODS steel. Y2O3 powder (mass fraction: 0.3%) was mixed with 316L stainless steel powder by low-energy ball milling method, and then the mixed metal powder was printed using SLM technology. Besides, the microstructure and mechanical properties of the 316L-0.3Y2O3 ODS steel were investigated in comparison with 316L stainless steel. The obtained show that the printing effect on 316L-0.3 Y2O3 ODS steel is quite good by using SLM technology. In addition, the hardness of ODS steel has also been improved. However, it was also observed that there are more pores in the 316L-0.3 Y2O3 ODS steel as compared with 316L steel, and Y2O3 agglomeration was observed on the top surface.  
author2 Zhou Wei
author_facet Zhou Wei
Liang, Penghui
format Theses and Dissertations
author Liang, Penghui
author_sort Liang, Penghui
title Development of 316L-0.3Y2O3 ODS steels by selective laser melting
title_short Development of 316L-0.3Y2O3 ODS steels by selective laser melting
title_full Development of 316L-0.3Y2O3 ODS steels by selective laser melting
title_fullStr Development of 316L-0.3Y2O3 ODS steels by selective laser melting
title_full_unstemmed Development of 316L-0.3Y2O3 ODS steels by selective laser melting
title_sort development of 316l-0.3y2o3 ods steels by selective laser melting
publishDate 2019
url http://hdl.handle.net/10356/76894
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