Microstructure evolution and gradient performance of 24CrNiMo steel prepared via laser melting deposition

Investigation of the Microstructure and Mechanical Properties of an Ultrahigh Strength Martensitic Steel Fabricated Using Laser Metal Deposition Additive Manufacturing

“…It utilizes a laser as the energy source. The metal powders are simultaneously delivered by a nozzle to the molten pool under computer-aided control [13], and the metal parts designed by the CAD model are obtained. A large number of metal parts made out of different metal alloys, including Ti-6Al-4V [14,15], Al-Si-Mg alloys [16], Cu alloys [17], nickel-based Metals 2022, 12, 1646 2 of 15 superalloys [18,19], steels [20,21], and numerous other advanced alloys [22][23][24], have been successfully manufactured by laser metal deposition.…”

Tailoring microstructure evolution and mechanical properties of a high-performance alloy steel through controlled thermal cycles of a direct laser depositing process

“…This reduces the ratio of austenite to martensite and the strength of DLD parts. Kang et al [15] found that in the DLD process of high strength low alloy steel, the bottom layers were tempered by the subsequent deposition layers, which caused the bottom layers to present a tempered microstructure, and the yield strength was decreased.…”