PSI - Issue 33

Costanzo Bellini et al. / Procedia Structural Integrity 33 (2021) 498–508 Author name / Structural Integrity Procedia 00 (2019) 000–000

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a Hot Isostatic Pressing (HIP) treatment. The crack length decreased with increasing HIP temperature, because the high-temperature diffusion process-induced uniform composition and structure (Zhou et al., 2020).

Figure 7 - a) Long cracks; b) short crack [Reproduced from (Zhao et al., 2009), with permission of Elsevier]

4.3. Surface roughness The surface roughness is one of the most important features in AM components, and it is also one of the most influential defects that could increase the local stress level and affect the crack initiation behavior.

Figure 8 - Effect of the process parameters on surface roughness (Maamoun et al., 2018)