The study and improvement of material extrusion additive manufacturing process for manufacturing of lightweight components

Name: Pasut Promsuwan

LCSH: Metals -- Extrusion

LCSH: Manufacturing processes

LCSH: Extrusion process

LCSH: Finite element method

LCSH: Additive Manufacturing

LCSH: Stainless Steel -- Heat Treatment

LCSH: Three-dimensional printing

Abstract: The aim of this thesis was to study the metal 3D printing technology and the materials extrusion additive manufacturing (MEAM) process. The work in this thesis was divided into two parts. In the first part, the effects of process parameters including infill percentage and wall thickness on microstructure and mechanical properties of 17-4PH stainless steel fabricated by MEAM process were investigated by the experimental study. The experimental process consists of specimen preparation, material characterization, and testing. During the specimen preparation process, the specimens were separated into original and heat treated specimens. The heat treated specimens in the experimental study were performed under H900 HT condition. In material characterization and testing, optical microscopes, micro Vickers hardness tests, and tensile tests were used. The results of the experiment showed that the original specimen’s microstructure is composed of martensite and δ-ferrite, both of which contain porosity. Subsequently, the H900 HT increased the strength of the specimen due to the precipitation hardening of 17-4PH stainless steel. The micro Vickers hardness values and tensile properties of H900 HT specimen are higher than those of the original specimen are consistent with the microstructure of H900 HT specimen. In the second part of the thesis, the numerical study was applied to study the effect of process parameters on mechanical properties in MEAM process of 17-4PH stainless steel. The results from the simulation were in good agreement with the experimental results. The findings from this research can be used to predict mechanical properties in lightweight components fabricated by the MEAM process.

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Name: Pruet Kowitwarangkul

Role: thesis advisor

Email : pruet.k.mme@tggs-kangkok.org

Created: 2022

Modified: 2567-08-21

Issued: 2024-08-21

วิทยานิพนธ์/Thesis

application/pdf

eng

DegreeName: Master of Engineering

Level: Master's Degree

Descipline: Materials and Production Engineering (International Program)

Grantor: King Mongkut's University of Technology North Bangkok

©copyrights King Mongkut's University of Technology North Bangkok

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