Effects of laser peening on maraging steel

Laser Shock Peening (LSP) has the ability to change the mechanical properties of the material. For the purpose of this study, the material in discussion would be additively manufactured maraging steel. Maraging steel is classified as ultra-high strength steel and is most often used in the airforce t...

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Main Author: Wong, Kenneth Zhi Hao
Other Authors: Zhou Wei
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2020
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Online Access:https://hdl.handle.net/10356/141235
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1412352023-03-04T19:43:54Z Effects of laser peening on maraging steel Wong, Kenneth Zhi Hao Zhou Wei School of Mechanical and Aerospace Engineering Advanced Remanufacturing and Technology Centre (ARTC) A*Star MWZHOU@ntu.edu.sg Engineering::Manufacturing Engineering::Materials Engineering::Mechanical engineering Laser Shock Peening (LSP) has the ability to change the mechanical properties of the material. For the purpose of this study, the material in discussion would be additively manufactured maraging steel. Maraging steel is classified as ultra-high strength steel and is most often used in the airforce to manufacture aircraft blades to withstand damage from debris. With technological advancements in additive manufacturing of maraging steel, it has opened the doors for many industries to create strong near net shaped parts to suit their specific needs. Combining this with laser shock peening, it could further improve the properties of additively manufactured maraging steel. For the purpose of this experiment, three samples of maraging steel were prepared. Two samples were laser shock peened, of which one was with an ablative layer and one without. The last sample was kept as-is. The samples undergone similar sample preparation and was examined through a series of tests designed to obtain results from several parameters such as surface profile, residual stress, hardness and microstructure. The results of the tests have shown that laser shock peening improved the surface profile of maraging steel. The hardness of maraging steel was also improved but only up till a certain depth. It was also noted that laser shock peening without an ablative layer will harden the maraging steel while at the same time inducing detrimental tensile residual stress. The difference in internal microstructure of the three samples were not distinct, which suggests that future study is required with more advanced microscopy techniques. Bachelor of Engineering (Mechanical Engineering) 2020-06-05T04:02:42Z 2020-06-05T04:02:42Z 2020 Final Year Project (FYP) https://hdl.handle.net/10356/141235 en B419 application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Manufacturing
Engineering::Materials
Engineering::Mechanical engineering
spellingShingle Engineering::Manufacturing
Engineering::Materials
Engineering::Mechanical engineering
Wong, Kenneth Zhi Hao
Effects of laser peening on maraging steel
description Laser Shock Peening (LSP) has the ability to change the mechanical properties of the material. For the purpose of this study, the material in discussion would be additively manufactured maraging steel. Maraging steel is classified as ultra-high strength steel and is most often used in the airforce to manufacture aircraft blades to withstand damage from debris. With technological advancements in additive manufacturing of maraging steel, it has opened the doors for many industries to create strong near net shaped parts to suit their specific needs. Combining this with laser shock peening, it could further improve the properties of additively manufactured maraging steel. For the purpose of this experiment, three samples of maraging steel were prepared. Two samples were laser shock peened, of which one was with an ablative layer and one without. The last sample was kept as-is. The samples undergone similar sample preparation and was examined through a series of tests designed to obtain results from several parameters such as surface profile, residual stress, hardness and microstructure. The results of the tests have shown that laser shock peening improved the surface profile of maraging steel. The hardness of maraging steel was also improved but only up till a certain depth. It was also noted that laser shock peening without an ablative layer will harden the maraging steel while at the same time inducing detrimental tensile residual stress. The difference in internal microstructure of the three samples were not distinct, which suggests that future study is required with more advanced microscopy techniques.
author2 Zhou Wei
author_facet Zhou Wei
Wong, Kenneth Zhi Hao
format Final Year Project
author Wong, Kenneth Zhi Hao
author_sort Wong, Kenneth Zhi Hao
title Effects of laser peening on maraging steel
title_short Effects of laser peening on maraging steel
title_full Effects of laser peening on maraging steel
title_fullStr Effects of laser peening on maraging steel
title_full_unstemmed Effects of laser peening on maraging steel
title_sort effects of laser peening on maraging steel
publisher Nanyang Technological University
publishDate 2020
url https://hdl.handle.net/10356/141235
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