scholarly journals Laser Powder Bed Fusion of Potential Superalloys: A Review

Metals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 58
Author(s):  
Prince Valentine Cobbinah ◽  
Rivel Armil Nzeukou ◽  
Omoyemi Temitope Onawale ◽  
Wallace Rwisayi Matizamhuka
Keyword(s):  
Computer Aided Design ◽  
Value Added ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
High Entropy ◽  
Controlled Processing ◽  
Structural Applications ◽  
Aided Design ◽  
Sintering Processes

The laser powder bed fusion (LPBF) is an additive manufacturing technology involving a gradual build-on of layers to form a complete component according to a computer-aided design. The LPBF process boasts of manufacturing value-added parts with higher accuracy and complex geometries for the transport, aviation, energy, and biomedical industries. TiAl-based alloys and high-entropy alloys (HEAs) are two materials envisaged as potential replacements of nickel-based superalloys for high temperature structural applications. The success of these materials hinge on optimization and implementation of tailored microstructures through controlled processing and appropriate alloy manipulations that can promote and stabilize new microstructures. Therefore, it is important to understand the LPBF technique, and its associated microstructure-mechanical property relationships. This paper discusses the metallurgical sintering processes of LPBF, the effects of process parameters on densification, microstructures, and mechanical properties of LPBFed TiAl-based alloys and HEAs. This paper also, presents updates and future studies recommendations on the LPBFed TiAl-based alloys and HEAs.

Powder Bed Fusion of Biomedical Co-Cr-Mo and Ti-6Al-4V Alloys: Microstructure and Mechanical Properties

2019 ◽  
Vol 1151 ◽  
pp. 3-7 ◽  
Author(s):  
Eleonora Santecchia ◽  
Paolo Mengucci ◽  
Andrea Gatto ◽  
Elena Bassoli ◽  
Lucia Denti ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Tensile Tests ◽  
Layer By Layer ◽  
Powder Bed Fusion ◽  
X Ray Diffraction ◽  
Powder Bed ◽  
Mechanical Parts ◽  
Aided Design ◽  
Microscopy Techniques ◽  
High Degree

Powder bed fusion (PBF) is an additive manufacturing technique, which allows to build complex functional mechanical parts layer-by-layer, starting from a computer-aided design (CAD) model. PBF is particularly attractive for biomedical applications, where a high degree of individualization is required. In this work, the microstructure of two biomedical alloys, namely Co-Cr-Mo and Ti-6Al-4V, were studied by X-ray diffraction and electron microscopy techniques. Hardness and tensile tests were performed on the sintered parts.

Compositionally graded AlxCoCrFeNi high-entropy alloy manufactured by laser powder bed fusion

Materialia ◽  
2021 ◽  
pp. 101308
Author(s):  
Fengxia Wei ◽  
Siyuan Wei ◽  
Kwang Boon Lau ◽  
Wei Hock Teh ◽  
Jing Jun Lee ◽  
...  
Keyword(s):  
High Entropy Alloy ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
High Entropy

scholarly journals Rapid Alloy Development of Extremely High-Alloyed Metals Using Powder Blends in Laser Powder Bed Fusion

Materials ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1706 ◽  
Author(s):  
Simon Ewald ◽  
Fabian Kies ◽  
Steffen Hermsen ◽  
Maximilian Voshage ◽  
Christian Haase ◽  
...  
Keyword(s):  
Microstructural Characterization ◽  
Chemical Compositions ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Alloy Development ◽  
Large Space ◽  
Powder Bed ◽  
High Entropy ◽  
Powder Blends ◽  
Rapid Alloy Development

The design of new alloys by and for metal additive manufacturing (AM) is an emerging field of research. Currently, pre-alloyed powders are used in metal AM, which are expensive and inflexible in terms of varying chemical composition. The present study describes the adaption of rapid alloy development in laser powder bed fusion (LPBF) by using elemental powder blends. This enables an agile and resource-efficient approach to designing and screening new alloys through fast generation of alloys with varying chemical compositions. This method was evaluated on the new and chemically complex materials group of multi-principal element alloys (MPEAs), also known as high-entropy alloys (HEAs). MPEAs constitute ideal candidates for the introduced methodology due to the large space for possible alloys. First, process parameters for LPBF with powder blends containing at least five different elemental powders were developed. Secondly, the influence of processing parameters and the resulting energy density input on the homogeneity of the manufactured parts were investigated. Microstructural characterization was carried out by optical microscopy, electron backscatter diffraction (EBSD), and energy-dispersive X-ray spectroscopy (EDS), while mechanical properties were evaluated using tensile testing. Finally, the applicability of powder blends in LPBF was demonstrated through the manufacture of geometrically complex lattice structures with energy absorption functionality.

scholarly journals Printability and microstructure of the CoCrFeMnNi high-entropy alloy fabricated by laser powder bed fusion

2018 ◽  
Vol 224 ◽  
pp. 22-25 ◽  
Author(s):  
A. Piglione ◽  
B. Dovgyy ◽  
C. Liu ◽  
C.M. Gourlay ◽  
P.A. Hooper ◽  
...  
Keyword(s):  
High Entropy Alloy ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
High Entropy

Bimetal printing of high entropy alloy/metallic glass by laser powder bed fusion additive manufacturing

2022 ◽  
Vol 141 ◽  
pp. 107430
Author(s):  
Hao Wang ◽  
Junquan Chen ◽  
Hailu Luo ◽  
Di Wang ◽  
Changhui Song ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Metallic Glass ◽  
High Entropy Alloy ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
High Entropy
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