PSI - Issue 38

Alok Gupta et al. / Procedia Structural Integrity 38 (2022) 40–49

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Author name / Structural Integrity Procedia 00 (2021) 000 – 000

load carrying struts. Due to expected scatter in the mechanical and fatigue properties of the SLM processed metallic materials [Li et al. (2016)], ensuring some level of load path redundancy provides a good option to build confidence for the practicing engineers.

Lip

(a)

(b)

Lip

Initiation Crack growth region

Crack growth region

(d)

(c)

Initiation

First Failure Point Fig. 8. Failure location of a straight strut during BT2 LCF test on the bracket

Fig. 9. Fracture surface examination of LCF specimens through SEM: (a) fracture surface of LT1, (b) Fracture surface of LT2, (c) initiation point for LT1, and (d) initiation point for LT2

Loc. 2 Loc. 1

(b) Loc. 2

(a) Loc. 1

50  m

(d) Loc. 2

(c) Loc. 1

Fig. 10. EBSD scan of fractured LCF LT2 specimen (longitudinal sections): (a) IPF-Z0 map for Location 1, (b) IPF-Z0 map for Location 2, (c) KAM map for Location 1, and (d) KAM map for Location 2, where KAM: Kernel Average Misorientation, IPF: Inverse Pole Figure