Characteristics of Laser Aided Direct Metal Powder Deposition Process for Nickel-Based Superalloy

Abstract

Laser additive direct deposition of metals is a new rapid manufacturing technology, which combines with computer aided design, laser cladding and rapid prototyping. The advanced technology can build fully-dense metal components directly from CAD files without a mould or tool. With this technology, a promising rapid manufacturing system called “Laser Metal Deposition Shaping (LMDS)” is being constructed and developed. Through the LMDS technology, fully-dense and near-net shaped metallic parts can be directly obtained through melting coaxially fed powder with a laser. In addition, the microstructure and mechanical properties of the as-formed samples were tested and analyzed synthetically. The results showed significant processing flexibility with the LMDS system over conventional processing capabilities was recognized, with potentially lower production cost, higher quality components, and shorter lead time.

The Hardness of Additively Manufactured Alloys

“…As-deposited HV [67,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125] as a function of φ, which depends on the chemical composition of nickel-based AM alloys. Reprinted from [17] with permission from Elsevier.…”

Microstructure and Properties of Thin-Wall Part by Laser Metal Deposition Shaping

“…675-677 565 the contrary instance. This phenomenon can be explained by the grain boundary strengthening mechanism, which was explained in detail in reference [8]. Consequently, originated from the distribution feature of microstructure, the anisotropy of the mechanical properties of deposited parts should be properly utilized so as to meet requirement of the mechanical properties.…”

The Hardness of Additively Manufactured Alloys

“…Ni60ALMDS Not reported Not reported[156] *EBM = Electron beam melting, DMD = Direct metal deposition, SLM = Selective laser melting, 3D-GMAW = Gas metal arc welding 3D printing, DMLS = Direct metal laser sintering, EBF3 = Electron beam freeform fabrication, DMLS = Direct metal laser sintering, SLS = Selective laser sintering, LRM = Laser Rapid Manufacturing, LC = Laser Cladding, SMD = Shaped Metal Deposition, LMD = Laser Metal Deposition † Values in parenthesis signify processes where it is more common to report the voltage and current Preprints (www.preprints.org) | NOT PEER-REVIEWED | Posted: 5 October 2018 doi:10.20944/preprints201810.0096.v1…”

“…As-deposited HV[105,[140][141][142][143][144][145][146][147][148][149][150][151][152][153][154][155][156] as a function of φ, which depends on the chemical composition of nickel-based AM alloys.…”