Impact of Different Heat Treatments on the Mechanical Properties and Microstructure of Precipitation-Hardened Stainless Steel Fabricated by Laser Powder Bed Fusion

The mechanical properties of additively manufactured metal parts are often considered inferior to those of their traditionally manufactured counterparts. These inferior mechanical properties are primarily attributed to prevalent defects inherent in additive manufacturing processes, leading to reduce...

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Bibliographic Details
Published in:Metallography, microstructure, and analysis microstructure, and analysis, 2024, Vol.13 (2), p.317-331
Main Authors: Negron, Juan, Ali, Majed, Almotari, Abdalmageed, Algamal, Anwar, Alafaghani, Ala’aldin, Qattawi, Ala
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Densification
Hardness
Heat treatment
Lasers
Materials Science
Mechanical properties
Metallic Materials
Microstructure
Nanotechnology
Original Research Article
Powder beds
Precipitation hardening steels
Process parameters
Stainless steels
Structural Materials
Surfaces and Interfaces
Thin Films
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Summary:The mechanical properties of additively manufactured metal parts are often considered inferior to those of their traditionally manufactured counterparts. These inferior mechanical properties are primarily attributed to prevalent defects inherent in additive manufacturing processes, leading to reduced performance and durability. Researchers have extensively studied processing parameters and post-processing techniques to determine optimal conditions for improving the mechanical properties of laser powder bed fusion. This study investigates the densification and microstructure characteristics of laser powder bed fusion 15-5 precipitation-hardened stainless steel. The effects of three developed post-heat treatments and three build directions are examined. The results reveal that heat treatment schedules influence material strength and hardness at the cost of reduced ductility, while the fabrication build direction impacts surface porosity. Prolonged heat treatment procedures resulted in the highest hardness values due to enhanced homogenization.
ISSN:2192-9262
2192-9270
DOI:10.1007/s13632-024-01051-8