Master thesis: The effect of process parameters on the microstructure and
Siemens Energy AB / Maskiningenjörsjobb / Finspång
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Additive manufacturing (AM) is changing the way components are produced making it possible to build complex geometries with improved performance. In AM, for example Powder Bed Fusion - Laser Beam (PBF-LB), components are built by using laser to melt a selective volume of sub-micron thick layer of powder. Process parameters like laser power, scanning speed, hatch distance and layer thickness are set appropriately to enable a stable process without the formation of defects. After melting, the selective volume solidifies, and a new powder layer is spread. The melting / solidification is repeated in successive layers until the desired component is produced. Using this approach, most complex geometries created with CAD can be manufactured.
Siemens Energy is interested in developing high layer thickness L-PBF processes for superalloys. A high layer thickness increases the efficiency and reduces the cost of the process. Certainly, the produced superalloy component must possess suitable properties that ensure high performance in our gas turbine engines. Thus, the knowledge of process-microstructure-property relationship will aid such developments.
Aims
The aim of the thesis is to investigate how variations of the combination of laser power, scanning speed and hatch distance influence the microstructure of Hastelloy X parts manufactured by 120 um layer thick L-PBF process. This layer thickness is higher than those of many processes in the literature. With certain combinations of process parameters, there are risks that defects will be formed or that the required properties are not attained. With other combinations, the required microstructure and properties could be attained. You will investigate samples manufactured in our innovative art L-PBF equipment. You will show how the process influence the microstructure and properties of these samples after heat-treatment. Your results will be valuable for us. It will provide the knowledge necessary for Siemens Energy to eventually optimize the manufacturing of our components.
The student will perform the following activities:
* Literature review of L-PBF of Hastelloy X
* Microstructure characterization of porosity and phases using optical and scanning electron microscopy. More advanced microscopy methods could be arranged.
* Testing the mechanical property of interest which will be either tensile, fatigue or creep rupture.
* Statistical analysis of the process-microstructure-property relationship
* Interpretation of useful results of the process-microstructure-property relationship.
Let's talk about you
We are looking for a MSc level student in either Material science, Mechanical Engineering, Manufacturing Engineering, or related programs. Previous work involving microscopy and/ or mechanical testing will be beneficial for your investigation. Knowledge of statistics will help you analyze your results systematically. To succeed in your studies we believe you have following attributes:
* Passion about the newest technology.
* Willingness to learn new things.
* Curiosity about the transformation of theory to practice.
* Interest in systematic ways of performing tasks.
Let's talk about us
We have the right skills and environment to help you succeed. You will have access to sample preparation and characterization equipment at the Materials Technology Department at Siemens Energy. Our field emission scanning electron microscope with attached electron backscattered diffraction can reach resolutions up to the nanometer scale. There are also tensile, fatigue and creep rupture test equipment. You will be a part of an experienced and supportive team that has expertise in materials science and data analysis and will assist you in every stage of the research. You will work in a friendly team, learn leadership skills, and establish valuable network necessary to accelerate your career. Working on this thesis with Siemens energy gives you an opportunity to gain industry experience in additive manufacturing technology that is crafting the new ways of making things.
Our Gas Services division offers Low-emission power generation through service and decarbonization. Zero or low emission power generation and all gas turbines under one roof, steam turbines and generators. Decarbonization opportunities through service offerings, modernization, and digitalization of the fleet.
Check out this page to learn more about our Gas Service business
https://www.siemens-energy.com/global/en/offerings/power-generation.htmlWe can offer you employment benefits such as: reduction of working hours, advance vacation, health care allowance and an eventual possibility to a flexible working place.
What's it like to work at Siemens Energy? Take a look:
https://bit.ly/3hD9pvK Who is Siemens Energy?
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Ersättning Fixed salary
Så ansöker du Sista dag att ansöka är 2023-05-21
Klicka på denna länk för att göra din ansökan Arbetsgivarens referens Arbetsgivarens referens för detta jobb är "244000".
Omfattning Detta är ett deltidsjobb.
Arbetsgivare Siemens Energy AB (org.nr 556606-6048)
Arbetsplats Siemens Energy
Jobbnummer 7716310
Observera att sista ansökningsdag har passerat.