Influence of single tensile overload on fatigue crack propagation behavior of the selective laser melting inconel 625 superalloy

2020 ◽  
Vol 239 ◽  
pp. 107305
Author(s):  
Duqiang Ren ◽  
Zhiyuan Xue ◽  
Yun Jiang ◽  
Xiaoan Hu ◽  
Yu Zhang
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Selective Laser Melting ◽  
Fatigue Crack Propagation ◽  
Inconel 625 ◽  
Laser Melting ◽  
Fatigue Crack Propagation Behavior ◽  
Propagation Behavior ◽  
Inconel 625 Superalloy ◽  
Crack Propagation Behavior

scholarly journals On the Dwell-Fatigue Crack Propagation Behavior of a High-Strength Ni-Base Superalloy Manufactured by Selective Laser Melting

2019 ◽  
Vol 51 (2) ◽  
pp. 962-972 ◽  
Author(s):  
Dunyong Deng ◽  
Robert Eriksson ◽  
Ru Lin Peng ◽  
Johan Moverare
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Selective Laser Melting ◽  
Fatigue Crack Propagation ◽  
Fatigue Cracking ◽  
Laser Melting ◽  
Fatigue Crack Propagation Behavior ◽  
Propagation Behavior ◽  
Dwell Fatigue ◽  
Crack Propagation Behavior

AbstractThis study focuses on the dwell-fatigue crack propagation behavior of IN718 manufactured via selective laser melting (SLM). The dwell-fatigue test condition is 823 K (550 $$^{\circ }$$∘C) with a long 2160-s dwell-holding period. Effects of heat treatment and loading direction on dwell-fatigue crack propagation rates are studied. A grain boundary $$\delta $$δ precipitate seems to be slightly beneficial to the dwell-fatigue cracking resistance of SLM IN718. A comparison has been made between SLM IN718 and forged counterparts at different temperatures, indicating that a creep damage mechanism is likely dominant for SLM IN718 under the present test condition. A general discussion of the inferior creep resistance of SLM IN718 is also included. The anisotropic dwell-fatigue cracking resistance has also been studied and rationalized with the effective stress intensity factor calculated from finite element modeling.

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