Effect of manufacturing parameters on the microstructure and mechanical properties of metal laser sintering parts of precipitate hardenable metals

Ala’aldin Alafaghani, Ala Qattawi, Mauricio Alberto Garza Castañón

Research output: Contribution to journalArticle

Abstract

Additive manufacturing (AM) started as a rapid prototyping (RP) technology to aid in visualizing and validating designs in the design process. However, with the recent improvements in metal AM parts, functional parts can be manufactured using laser-based AM. Currently, metal AM parts have comparable mechanical properties to traditional manufacturing parts. 15-5PH stainless steel and Inconel 718 are two of the most commonly used metals in laser-based AM, and they have a high modulus of elasticity and tensile strength and can be precipitate hardened to increase their strength and hardness by heat treatment. These properties make 15-5PH stainless steel and Inconel 718 suitable for many industrial applications such as aerospace and automotive. However, due to the nature of AM, AM parts usually suffer from anisotropy. In this paper, the mechanical properties such as tensile strength, modulus of elasticity, yield strength, and ductility are investigated at various elevated temperatures up to 350 °C and compared with the mechanical properties at room temperature using specimens printed in three different orientations to capture the effect on the anisotropy. In addition to that, the microstructure of the specimens is studied to investigate the influence of elevated temperature on the specimens.

Original languageEnglish
JournalInternational Journal of Advanced Manufacturing Technology
DOIs
Publication statusAccepted/In press - 1 Jan 2018

Fingerprint

3D printers
Precipitates
Sintering
Mechanical properties
Microstructure
Lasers
Metals
Anisotropy
Tensile strength
Stainless steel
Elastic moduli
Rapid prototyping
Temperature
Industrial applications
Yield stress
Ductility
Hardness
Heat treatment

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Software
  • Mechanical Engineering
  • Computer Science Applications
  • Industrial and Manufacturing Engineering

Cite this

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Effect of manufacturing parameters on the microstructure and mechanical properties of metal laser sintering parts of precipitate hardenable metals. / Alafaghani, Ala’aldin; Qattawi, Ala; Castañón, Mauricio Alberto Garza.

In: International Journal of Advanced Manufacturing Technology, 01.01.2018.

Research output: Contribution to journalArticle

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