Influence of stacking direction on the local cyclic plastic behavior of selective laser melted TC4 alloy notched parts
In this paper the influence of stacking direction on the local cyclic plastic behavior of select-ive laser melted(SLM)TC4 alloy notched parts had been investigated through digital image correlation technology.The results indicate that the plastic deformation near the root of the notched parts can be in-fluenced by the stacking direction and notch radius,thereby affecting the fatigue life of the notched parts.The ratcheting strain and strain rate near the root of the notch decrease with the change of stack-ing direction(from 0° to 90°),and also decrease with the change of the notch radius.Compared with ef-fect by notch radius,stacking direction cause less influence on the ratchet strain,strain rate and fatigue life.The research results will provide a certain theoretical reference for the fatigue design of SLM parts.
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