Fe-Mn-Al-Ni Shape Memory Alloy Additively Manufactured via Laser Powder Bed Fusion

Fe-Mn-Al-Ni is an Fe-based shape memory alloy (SMA) featuring higher stability and low temperature dependency of superelasticity stress over a wide range of temperatures. Additive manufacturing (AM) is a promising technique for fabricating Fe-SMA with enhanced properties, which can eliminate the lim...

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Bibliographic Details
Published in:Crystals (Basel) 2023-10, Vol.13 (10), p.1505
Main Authors: Alhamdi, Ismail, Algamal, Anwar, Almotari, Abdalmageed, Ali, Majed, Gandhi, Umesh, Qattawi, Ala
Format: Article
Language:English
Subjects:
3D printing
Additive manufacturing
Alloys
Aluminum
Cost control
Densification
densification behavior
Fe-based shape memory alloy
Iron
Laser beam melting
laser remelting
Lasers
Low temperature
Manganese
Melting
Nickel
Optimization
Parameter identification
Porosity
Powder beds
Powders
processing parameters
Shape memory alloys
Superelasticity
surface properties
Surface roughness
Temperature
Temperature dependence
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Summary:Fe-Mn-Al-Ni is an Fe-based shape memory alloy (SMA) featuring higher stability and low temperature dependency of superelasticity stress over a wide range of temperatures. Additive manufacturing (AM) is a promising technique for fabricating Fe-SMA with enhanced properties, which can eliminate the limitations associated with conventional fabrication and allow for the manufacture of complicated shapes with only a single-step fabrication. The current work investigates the densification behavior and fabrication window of an Fe-Mn-Al-Ni SMA using laser powder bed fusion (LPBF). Experimental optimization was performed to identify the optimum processing window parameters in terms of laser power and scanning speed to fabricate Fe-Mn-Al-Ni SMA samples. Laser remelting was also employed to improve the characteristics of Fe-Mn-Al-Ni-fabricated samples. Characterization and testing techniques were carried out to assess the densification behavior of Fe-Mn-Al-Ni to study surface roughness, density, porosity, and hardness. The findings indicated that using a laser power range of 175–200 W combined with a scanning speed of 800 mm/s within the defined processing window parameters can minimize the defects with the material and lead to decreased surface roughness, lower porosity, and higher densification.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst13101505