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Effect of Heat Treatment on Creep Deformation and Fracture Properties for a Coarse-Grained Inconel 718 Manufactured by Directed Energy Deposition

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F23%3AN0000023" target="_blank" >RIV/26316919:_____/23:N0000023 - isvavai.cz</a>

  • Alternative codes found

    RIV/00216208:11320/23:10474189

  • Result on the web

    <a href="https://www.mdpi.com/1996-1944/16/4/1377" target="_blank" >https://www.mdpi.com/1996-1944/16/4/1377</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.3390/ma16041377" target="_blank" >10.3390/ma16041377</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Effect of Heat Treatment on Creep Deformation and Fracture Properties for a Coarse-Grained Inconel 718 Manufactured by Directed Energy Deposition

  • Original language description

    The creep properties of a laser-directed energy deposition (L-DED) technique manufactured Inconel 718 (IN718) was investigated at 650 degrees C/700 MPa. Microstructure and creep properties of L-DED IN718 samples were tailored by various post heat treatments involving homogenization heat treatment with temperature ranging from 1080 to 1180 degrees C + double aging and hot isostatic pressing (HIP). Microstructural changes and their influence on the creep behavior and fracture mechanism were observed and discussed. The results show that L-DED sample heat treated by a simple double aging exhibits a 49% increase in creep lifetime t(r) and a comparable creep elongation e(f) when compared to the wrought material, due to the reserved coarse dislocation cell substructure from the L-DED process. The loss of dislocation cell structure and the coarsening of grains at higher temperature of heat treatments contributes to a shorter t(r,) epsilon(f), but faster epsilon(min) (minimum creep rate). The present work demonstrates that a simultaneous improvement of creep strength and creep elongation can be achieved in the case of a coarse-grained L-DED IN718 by a double aging treatment which can preserve both the strengthening precipitates and an appropriate size of dislocation cells.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    20501 - Materials engineering

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2023

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    MATERIALS

  • ISSN

    1996-1944

  • e-ISSN

    1996-1944

  • Volume of the periodical

    16

  • Issue of the periodical within the volume

    4

  • Country of publishing house

    CH - SWITZERLAND

  • Number of pages

    12

  • Pages from-to

    nestránkováno

  • UT code for WoS article

    000940704100001

  • EID of the result in the Scopus database

    2-s2.0-85149204370