Processes and applications of metal additive manufacturing

Mahale, Rayappa Shrinivas; Shamanth, V.; Hemanth, K.; Nithin, S.K.; Sharath, P.C.; Shashanka, Rajendrachari; Patil, Adarsh; Shetty, Darshan P

doi:10.1016/j.matpr.2021.08.298

Cited by 33 publications

(14 citation statements)

References 43 publications

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“…Their main limitations stem from the high thermal gradients across the part that may cause residual stresses, product warping, and may limit the maximum build size [11]. Fused Deposition processes include Direct Energy Deposition (DED), also known as LENS (Laser Engineered Net Shaping), and DMD (Direct Metal Deposition) [13]. The metal, in the form of a powder or a metallic filament, comes from the top of the machine and it is molten with a plasma arc, a laser, or an electron beam.…”

Section: Conventional Processes Vs Am Technologymentioning

confidence: 99%

Additive Manufacturing of Metal Load‐Bearing Implants 1: Geometric Accuracy and Mechanical Challenges

Zanetti,

Fragomeni,

Sanguedolce

et al. 2024

Chemie Ingenieur Technik

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Additive manufacturing (AM) of load‐bearing metal implants allows sustainable production of personalized implants with complex shapes and inner architectures. Implants must meet strict requirements to not harm patients, and production technique must certify their performance. Available materials, many production parameters and implant personalization on patient's needs represent limits of AM. Layer‐by‐layer material deposition and repeated thermal cycles typical of AM may also cause discontinuities between layers affecting implant mechanical features, and its match to the host body. In this paper the mechanical challenges that AM must overcome to replace traditional manufacturing techniques are discussed, in order to better understand whether AM has to be limited to implant personalization for exceptional cases.

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Section: Conventional Processes Vs Am Technologymentioning

confidence: 99%

Additive Manufacturing of Metal Load‐Bearing Implants 1: Geometric Accuracy and Mechanical Challenges

Zanetti,

Fragomeni,

Sanguedolce

et al. 2024

Chemie Ingenieur Technik

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“…Additive manufacturing (AM) continues to be an interesting topic in the manufacturing and engineering world due to its positive impact both on both the global economy and the environment [1]. AM potentially decreases global energy demand by up to 25% in addition to substantial raw materials savings [2].…”

Section: Introductionmentioning

confidence: 99%

Optimisation of precipitation hardening for 15-5 PH martensitic stainless steel produced by wire arc directed energy deposition

Ščetinec

Klobčar

Nagode

et al. 2023

Science and Technology of Welding and Joining

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This paper discusses directed energy deposition of 15-5 PH, which was successfully tailored with precipitation hardening (PH) to achieve the desired properties. Parametric analysis of solution annealing and aging at various time and temperature combinations was performed. Material characterisation was done in the as-deposited, solution annealed, and PH states. Investigations included microscopy, SEM/EDS, fractography, hardness, tensile, and impact toughness test. The as-deposited microstructure was composed of martensite laths along with delta ferrite. Optimisation of solution annealing was mandatory to achieve homogeneous austenite, which allowed PH. PH resulted in similar properties compared to conventionally produced steel. Peak aging resulted in 450 HV10 and an Rm of 1350 MPa, while the over-aged condition resulted in an impact toughness of over 77 J/cm 2 .

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“…[ 9 ] AM technologies for metals include powder bed fusion (PBF) technology and direct energy deposition (DED) technology. [ 10 ] The PBF technology manufactures the parts by laying powder, preheating, and selective sintering in the powder bed. It can obtain high surface quality, but its molding size is limited by the powder bed.…”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Treatment on Fracture Behavior of AISI 630 Alloy Manufactured by Directed Energy Deposition

et al. 2023

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AISI 630 alloy is widely used in the manufacture of CFM56 series aeroengine fan casing because of its high strength and excellent ductility. Herein, AISI 630 alloy is directly manufactured by directed energy deposition. The microstructural evolution, mechanical properties, and fracture behavior of AISI 630 alloy in as‐deposition, solution, and aging conditions are analyzed. Scanning electron microscopy, X‐ray diffraction, and electron backscattering diffraction are used to characterize the microstructure and phase characteristics. Mechanical tensile and Vickers hardness tests are performed. The results show that the samples as‐deposited, solution, and solution and aging samples are all composed of α phase and small amount γ phase, where γ phase proportions are 10.6%, 0.2%, and 10.8%, respectively. Due to transformation‐induced plasticity effect, the as‐deposited specimens have the highest strain hardening coefficient (0.410–0.432), which results in the tensile strength of 1121–1143 MPa, the yield strength of 279–293 MPa, and the fracture elongation of 14.9%. After solution and aging treatment, the tensile strength is increased by about 8% (1206–1239 MPa), the elongation at break is decreased by about 30% (9.6–11.4%), and the yield strength is increased by more than one time (740–907 MPa).

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Processes and applications of metal additive manufacturing

Cited by 33 publications

References 43 publications

Additive Manufacturing of Metal Load‐Bearing Implants 1: Geometric Accuracy and Mechanical Challenges

Additive Manufacturing of Metal Load‐Bearing Implants 1: Geometric Accuracy and Mechanical Challenges

Optimisation of precipitation hardening for 15-5 PH martensitic stainless steel produced by wire arc directed energy deposition

Effect of Heat Treatment on Fracture Behavior of AISI 630 Alloy Manufactured by Directed Energy Deposition

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