Abstract
The current study focuses on the influence of single point incremental forming (SPIF) process on the low-cycle fatigue (LCF) performance of AA6061-T6 sheet. The base material (BM) displays a saturated cyclic response for all strain amplitudes. The SPIF-formed specimens show similar behavior, especially at lower strain amplitudes; however, they exhibit significant cyclic softening at higher strain amplitudes. The LCF life of SPIF specimens (considered in rolling and transverse directions) for all strain amplitudes is slightly reduced due to overlapping/repeated sheet deformation and scallops formed during tool movement. Overlapping affects strain accumulation during SPIF, and scallops affect strain accumulation during cyclic loading and act as a stress concentration site. The texture alteration during the incremental forming also influences the ductility and the subsequent LCF life of the SPIF components.
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