A Review on Microstructure and Mechanical Properties of L-PBF 17-4PH and 15-5PH SS

Sarma, I. Kartikeya; Selvraj, N.; Kumar, Adepu

doi:10.1007/978-981-16-7787-8_4

Cited by 4 publications

(3 citation statements)

References 46 publications

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“…The main advantages of AM are that this technology produces near net shapes in less time compared to conventional manufacturing processes [49]. Also, this technology can fabricate parts with extremely complicated structures that cannot be fabricated by traditional methods [50].…”

Section: Of 17mentioning

confidence: 99%

Characterization of Microstructural and Mechanical Properties of 17-4 PH Stainless Steel by Cold Rolled and Machining vs. DMLS Additive Manufacturing

Moreno-Garibaldi,

Alvarez-Vera,

Beltrán-Fernández

et al. 2024

JMMP

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The 17-4 PH stainless steel is widely used in the aerospace, petrochemical, chemical, food, and general metallurgical industries. The present study was conducted to analyze the mechanical properties of two types of 17-4 PH stainless steel—commercial cold-rolled and direct metal laser sintering (DMLS) manufactured. This study employed linear and nonlinear tensile FEM simulations, combined with various materials characterization techniques such as tensile testing and nanoindentation. Moreover, microstructural analysis was performed using metallographic techniques, optical microscopy, scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). The results on the microstructure for 17-4 PH DMLS stainless steel reveal the layers of melting due to the laser process characterized by complex directional columnar structures parallel to the DMLS build direction. The mechanical properties obtained from the simple tension test decreased by 17% for the elastic modulus, 7.8% for the yield strength, and 7% for the ultimate strength for 17-4 PH DMLS compared with rolled 17-4 PH stainless steel. The FEM simulation using the experimental tension test data revealed that the 17-4 PH DMLS stainless steel experienced a decrease in the yield strength of ~8% and in the ultimate strength of ~11%. A reduction of the yield strength of the material was obtained as the grain size increased.

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Section: Of 17mentioning

confidence: 99%

Characterization of Microstructural and Mechanical Properties of 17-4 PH Stainless Steel by Cold Rolled and Machining vs. DMLS Additive Manufacturing

Moreno-Garibaldi,

Alvarez-Vera,

Beltrán-Fernández

et al. 2024

JMMP

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“…17-4 PH stainless steel is widely used in the aerospace, medical, and marine industries. 1–8 Very few studies have been carried out on the effect of design parameters on the microstructure, mechanical, and residual stress of parts fabricated by selective laser melting (SLM). 9–12…”

Section: Introductionmentioning

confidence: 99%

“…17-4 PH stainless steel is widely used in the aerospace, medical, and marine industries. [1][2][3][4][5][6][7][8] Very few studies have been carried out on the effect of design parameters on the microstructure, mechanical, and residual stress of parts fabricated by selective laser melting (SLM). [9][10][11][12] Ali et al 10 reported that there were fewer residual stresses with 90°scan rotation direction and they also stated there was no correlation between the variation of mechanical properties and scan strategy for Ti6A l4 V. Lashgari et al 13 investigated the influence of hexagon and concentric scan strategies on microstructure and mechanical properties of additively manufactured 17-4PH stainless steel.…”

Section: Introductionmentioning

confidence: 99%

Influence of scanning strategies on microstructure, residual stress, and corrosion behavior of 17-4 PH stainless steel fabricated by selective laser melting

Sarma

Selvaraj

Kumar

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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In the present study, the effect of hexagonal (inside out and outside in), rectangular (horizontal, vertical, alternate, and both), and strip (horizontal, vertical, alternate, and both) scan strategies on the microstructure, residual stresses, and the corrosion behavior of 17-4 PH stainless steel samples fabricated by selective laser melting were investigated. The results indicate that through hexagonal inside-out scanning strategy, the sample density and hardness are double than that of wrought and cast alloys. Microstructure consists of small and large molten pools on the side and front surface of each sample generated using a different scan strategy. Austenite phase and ferrite peak at the highest intensity were observed by X-ray diffraction for hexagonal inside-out sample. Electron back scattered diffraction (EBSD) orientation maps showed a high-density of ɣ-austenite phase (43%) in the finer grain size area of the hexagonal inside-out scan strategy sample. Low residual stresses and high corrosion resistance (<0.5 mpy) were obtained for the hexagonal inside-out scan strategy sample compared to other two strategies because of lower defects, lower thermal gradient, and smaller scan tracks.

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Selective Laser Melting of Stainless Steels: A review of Process, Microstructure and Properties

Mansoura,

Omidi,

Barka

et al. 2024

Met. Mater. Int.

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A Review on Microstructure and Mechanical Properties of L-PBF 17-4PH and 15-5PH SS

Cited by 4 publications

References 46 publications

Characterization of Microstructural and Mechanical Properties of 17-4 PH Stainless Steel by Cold Rolled and Machining vs. DMLS Additive Manufacturing

Characterization of Microstructural and Mechanical Properties of 17-4 PH Stainless Steel by Cold Rolled and Machining vs. DMLS Additive Manufacturing

Influence of scanning strategies on microstructure, residual stress, and corrosion behavior of 17-4 PH stainless steel fabricated by selective laser melting

Selective Laser Melting of Stainless Steels: A review of Process, Microstructure and Properties

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