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Effect of Heat Treatment on SLM Maraging C-300 Steel Parts.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Effect of Heat Treatment on SLM Maraging C-300 Steel Parts./
Author:	Oliveira, Abel Loureiro.
Description:	1 online resource (72 pages)
Notes:	Source: Masters Abstracts International, Volume: 84-01.
Contained By:	Masters Abstracts International84-01.
Subject:	Metals. -
Online resource:	click for full text (PQDT)
ISBN:	9798835533213

Effect of Heat Treatment on SLM Maraging C-300 Steel Parts.
Oliveira, Abel Loureiro.

Effect of Heat Treatment on SLM Maraging C-300 Steel Parts. - 1 online resource (72 pages)

Source: Masters Abstracts International, Volume: 84-01.

Thesis (M.E.)--Universidade do Porto (Portugal), 2019.

Includes bibliographical references

This dissertation has been executed as part of a broader investigation on Additive Manufacturing of components for the automotive industry, for the conclusion of the master's degree in Metallurgical and Materials Engineering at the Faculty of Engineering of the University of Porto. The purpose of this work has been to evaluate the response of Maraging C-300 steel parts produced by Laser Powder Bed Fusion Metal Additive Manufacturing to age hardening heat treatment requiring the least resources possible and to assess the quality of the structures produced.Initially, this work introduces Additive Manufacturing and emphasizes the advantages of its implementation on an industrial environment and the particular challenges and limitations of Metal Additive Manufacturing, especially the reproducibility of parts and microstructures. Secondly, the processing issues of LPBF (SLM) are exposed highlighting the physical mechanisms that rule metal laser-fusion, the resulting structures and the structural defects, particularly those encountered in the parts under study. Thirdly, the materials and experimental procedures of this work are described, followed by the results obtained, which are then discussed.The objective of this dissertation was to assess the structure of SLM processed components with a specific geometry, used in cable harness production for the automotive industry. These parts were then used to optimize the aging treatment conditions to maximize the mechanical response of SLM tensile test parts built in two different orientations.The parts exhibited vertical surfaces with high roughness and a very thin microstructure with few process-induced pores and a considerable amount of Ti-Al oxides, likely due to an excess of oxygen in the melt. These parts were cut into small samples for test aging treatments and the highest hardness condition (6 hours at 490 ºC) was chosen for the aging heat treatment of the tensile test samples. The tensile test samples yielded mechanical resistance similar to conventionally fabricated parts, although with considerably less ductility. No significant anisotropy was measured between specimens built with the major axis perpendicular or parallel to the powder bed.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798835533213Subjects--Topical Terms:

563369
Metals.
Index Terms--Genre/Form:

554714
Electronic books.

Effect of Heat Treatment on SLM Maraging C-300 Steel Parts.
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504 $a Includes bibliographical references
520 $a This dissertation has been executed as part of a broader investigation on Additive Manufacturing of components for the automotive industry, for the conclusion of the master's degree in Metallurgical and Materials Engineering at the Faculty of Engineering of the University of Porto. The purpose of this work has been to evaluate the response of Maraging C-300 steel parts produced by Laser Powder Bed Fusion Metal Additive Manufacturing to age hardening heat treatment requiring the least resources possible and to assess the quality of the structures produced.Initially, this work introduces Additive Manufacturing and emphasizes the advantages of its implementation on an industrial environment and the particular challenges and limitations of Metal Additive Manufacturing, especially the reproducibility of parts and microstructures. Secondly, the processing issues of LPBF (SLM) are exposed highlighting the physical mechanisms that rule metal laser-fusion, the resulting structures and the structural defects, particularly those encountered in the parts under study. Thirdly, the materials and experimental procedures of this work are described, followed by the results obtained, which are then discussed.The objective of this dissertation was to assess the structure of SLM processed components with a specific geometry, used in cable harness production for the automotive industry. These parts were then used to optimize the aging treatment conditions to maximize the mechanical response of SLM tensile test parts built in two different orientations.The parts exhibited vertical surfaces with high roughness and a very thin microstructure with few process-induced pores and a considerable amount of Ti-Al oxides, likely due to an excess of oxygen in the melt. These parts were cut into small samples for test aging treatments and the highest hardness condition (6 hours at 490 ºC) was chosen for the aging heat treatment of the tensile test samples. The tensile test samples yielded mechanical resistance similar to conventionally fabricated parts, although with considerably less ductility. No significant anisotropy was measured between specimens built with the major axis perpendicular or parallel to the powder bed.
520 $a Este trabalho de dissertacao em engenharia metalurgica e de materiais e parte de um projeto de investigacao mais vasto sobre fabrico aditivo de componentes para a industria automovel. O principal objetivo foi avaliar a resposta de componentes em aco Maraging C-300, produzidos por fabrico aditivo, a tratamentos termicos de envelhecimento. Com estes tratamentos procurou-se minimizar o tempo e temperaturas exigidos mantendo as propriedades dos componentes produzidos. Este trabalho comeca por introduzir o processamento de componentes metalicos por fabrico aditivo enfatizando as vantagens da sua implementacao na industria, mas tambem as suas limitacoes e desafios a superar, especialmente a reprodutibilidade de microestruturas e componentes. E tambem apresentado o processo de fabrico por laser em cama de po (SLM), destacando os mecanismos fisicos que controlam a fusao de metal por laser, as estruturas resultantes e os defeitos estruturais, particularmente os que foram encontrados nas pecas analisadas.Seguidamente, descrevem-se os materiais e o procedimento experimental e sao apresentados e discutidos os resultados obtidos. Foi caracterizada a microestrutura de componentes usados no fabrico de cabos para a industria automovel; desses componentes foram cortadas amostras para o teste das condicoes de tratamento termico de envelhecimento a serem aplicadas a provetes de tracao, os quais foram produzidos em duas direcoes diferentes e solicitados a tracao.As superficies verticais dos componentes exibiam uma maior rugosidade, tendo sido observada alguma porosidade e a presenca de oxidos de Ti-Al, provavelmente devido a um excesso de oxigenio no banho. Os componentes foram cortados em pequenas amostras que foram submetidas a tratamento termico. As condicoes associadas a maior dureza (6 horas a 490ºC) foram selecionadas para tratar os provetes de tracao que apresentaram uma resistencia mecanica semelhante a de materiais produzidos por processos convencionais, mas com menor ductilidade. Os provetes de tracao construidos com o eixo de solicitacao mecanica perpendicularmente a cama de po apresentaram resultados semelhantes aos produzidos com esse eixo paralelo a cama de po.
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