TY - GEN

T1 - Effect of Additional Heating of the Substrate on the Phase Composition of Inconel 718 Obtained by Direct Metal Deposition

AU - Gulov, Mikhail A.

AU - Gertsel, Ilya S.

AU - Malikov, Alexander G.

AU - Vitoshkin, Igor E.

AU - Golyshev, Alexander A.

AU - Zavjalov, Alexey P.

N1 - Conference code: 25

PY - 2024

Y1 - 2024

N2 - This work investigates the effect of the temperature of the substrate additional heating on the structural-phase composition of an Inconel 718 coating obtained by direct laser growth. Using synchrotron radiation diffraction in the Debye-Scherrer geometry, it was shown that an additional heating temperature of the substrate of 750 °C leads to a more intense formation of the strengthening γ′′ - phase, as well as Laves phases with the stoichiometry (Ni, Cr, Fe)2(Nb, Mo, Ti). Also, as a result of a decrease in the temperature gradient formed during laser cladding and a decrease in the cooling rate of the melt pool, the structure of the formed material changed. The material obtained without additional heating is characterized by the presence of columnar dendrites in the structure located towards the substrate. Additional heating of the substrate up to 750 °C contributed to a change in the structure of the sample and the formation of larger dendrites without a preferred direction. In both cases, at the boundaries of the dendrites, segregation of a large number of elements forming the Laves phases occurred: Nb, Mo, Ti. The internal material of dendrites is characterized by a high content of Al, Cr, Fe and Ni.

AB - This work investigates the effect of the temperature of the substrate additional heating on the structural-phase composition of an Inconel 718 coating obtained by direct laser growth. Using synchrotron radiation diffraction in the Debye-Scherrer geometry, it was shown that an additional heating temperature of the substrate of 750 °C leads to a more intense formation of the strengthening γ′′ - phase, as well as Laves phases with the stoichiometry (Ni, Cr, Fe)2(Nb, Mo, Ti). Also, as a result of a decrease in the temperature gradient formed during laser cladding and a decrease in the cooling rate of the melt pool, the structure of the formed material changed. The material obtained without additional heating is characterized by the presence of columnar dendrites in the structure located towards the substrate. Additional heating of the substrate up to 750 °C contributed to a change in the structure of the sample and the formation of larger dendrites without a preferred direction. In both cases, at the boundaries of the dendrites, segregation of a large number of elements forming the Laves phases occurred: Nb, Mo, Ti. The internal material of dendrites is characterized by a high content of Al, Cr, Fe and Ni.

KW - direct metal deposition

KW - inconel

KW - phase composition

KW - preheat

KW - synchrotron radiation

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85201965414&origin=inward&txGid=6b46818db2ee839712c3d981c17be34b

UR - https://www.mendeley.com/catalogue/6fee927b-ec36-39a1-90e7-98b81be164b6/

U2 - 10.1109/EDM61683.2024.10614966

DO - 10.1109/EDM61683.2024.10614966

M3 - Conference contribution

SN - 9798350389234

T3 - International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices, EDM

SP - 920

EP - 923

BT - International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices, EDM

PB - IEEE Computer Society

T2 - 25th IEEE International Conference of Young Professionals in Electron Devices and Materials

Y2 - 28 June 2024 through 2 July 2024

ER -