TY - GEN
T1 - Creep and thermomechanical fatigue of functionally graded inconel 718 produced by additive manufacturing
AU - Popovich, V. A.
AU - Borisov, E.V.
AU - Heurtebise, V.
AU - Riemslag, T.
AU - Popovich, A.A.
AU - Sufiiarov, V. Sh
PY - 2018
Y1 - 2018
N2 - Inconel 718 is a nickel-based superalloy commonly used in aircraft engine and nuclear applications, where components experience severe mechanical stresses. Due to the typical high temperature applications, Thermo-Mechanical Fatigue (TMF) and creep tests are common benchmarks for such applications. Additive manufacturing offers a unique way of manufacturing Inconel 718 with high degree of design freedom. However, limited knowledge exists regarding the resulting high temperature properties. The objective of this work is to evaluate creep and TMF behaviour of Inconel 718, produced by selective laser melting (SLM). A novel microstructural design, allowing for grain size control was employed in this study. The obtained functionally graded Inconel 718, exhibiting core with coarse and outside shell with fine grained microstructure, allowed for the best trade-off between creep and fatigue performance. The post heat-treatment regimens and resulting microstructures are also evaluated and its influence on creep and TMF is discussed.
AB - Inconel 718 is a nickel-based superalloy commonly used in aircraft engine and nuclear applications, where components experience severe mechanical stresses. Due to the typical high temperature applications, Thermo-Mechanical Fatigue (TMF) and creep tests are common benchmarks for such applications. Additive manufacturing offers a unique way of manufacturing Inconel 718 with high degree of design freedom. However, limited knowledge exists regarding the resulting high temperature properties. The objective of this work is to evaluate creep and TMF behaviour of Inconel 718, produced by selective laser melting (SLM). A novel microstructural design, allowing for grain size control was employed in this study. The obtained functionally graded Inconel 718, exhibiting core with coarse and outside shell with fine grained microstructure, allowed for the best trade-off between creep and fatigue performance. The post heat-treatment regimens and resulting microstructures are also evaluated and its influence on creep and TMF is discussed.
KW - Additive manufacturing
KW - Functional grading Creep
KW - Inconel 718
KW - Thermo-mechanical fatigue
UR - http://www.scopus.com/inward/record.url?scp=85044480105&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-72526-0_9
DO - 10.1007/978-3-319-72526-0_9
M3 - Conference contribution
AN - SCOPUS:85044480105
SN - 9783319725253
T3 - Minerals, Metals and Materials Series
SP - 85
EP - 97
BT - TMS 2018 - 147th Annual Meeting and Exhibition
A2 - The Minerals, Metals & Materials Society Editor, null
PB - Springer
CY - Cham, Switzerland
T2 - 147th Annual Meeting and Exhibition of the Minerals, Metals and Materials Society, TMS 2018
Y2 - 11 March 2018 through 15 March 2018
ER -