Analysis reveals fatigue resistance in 17-4 PH stainless steel MBJ parts, suggesting time-efficient testing methods.
This study applies rapid fatigue testing, the stiffness method, to assess the fatigue resistance of 17-4 PH metal binder jetting (MBJ) precipitation-hardened martensitic stainless steel. Traditional fatigue tests are costly and time-consuming, limiting the generation of comprehensive data about the different stages of the fatigue mechanism. Especially for additive manufacturing (AM) parts in which the process-induced defects and anisotropy could result in different fatigue resistance and pending to be characterized compared to conventionally fabricated counterparts. The stiffness method has been validated for metal sheets and AM products recently and can estimate the fatigue limit within a day. This brings instrumental value for accelerating the AM industrial adoption ramp when fatigue performance is required. In this work, the method was used to evaluate the fatigue limit of MBJ specimens printed in different directions, showing its ability to estimate the fatigue limit with 90% time and cost savings compared to conventional methods.
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Lirgeshas et al. (2025) studied this question.
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