Effects of specimen geometry and surface defect on high and very high cycle fatigue of TC17 alloy

Wu, Han; Chi, Weiqian; Xu, Wei; Wang, Wenjing; Sun, Chengqi

doi:10.1016/j.engfracmech.2022.108940

Cited by 5 publications

(1 citation statement)

References 43 publications

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“…Zhang et al's research emphasized the influential role of specimen geometry in the fatigue performance and crack initiation of alloys [42]. Specifically, specimens with the same geometry but different reduced working section lengths demonstrate a noteworthy influence on fatigue life [24,43].…”

Section: Strain-life Relationshipmentioning

confidence: 99%

Low-Cycle Fatigue Behavior and the Combined Cyclic Hardening Material Model of Plate-Shaped Zn-22Al Alloy for Seismic Dampers

Liu,

Han,

Yang

2024

Materials

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This study investigates the potential of the plate-shaped Zn-22 wt.% Al (Zn-22Al) alloy as an innovative energy dissipation material for seismic damping devices, since plate-shaped material is more suitable to fabricate large-scale devices for building structures. The research begins with the synthesis of Zn-22Al alloy, given its unavailability in the commercial market. Monotonic tensile tests and low-cycle fatigue tests are performed to analyze material properties and fatigue performance of plate-shaped specimens. Monotonic tensile curves and cyclic stress–strain curves, along with SEM micrographs for microstructure and fracture surface analysis, are acquired. The combined cyclic hardening material model is calibrated to facilitate finite element analysis. Experimental results reveal exceptional ductility in Zn-22Al alloy, achieving a fracture strain of 200.37% (1.11 fracture strain). Fatigue life ranges from 1126 to 189 cycles with increasing strain amplitude (±0.8% to ±2.5%), surpassing mild steel by at least 6 times. The cyclic strain–life relationships align well with the Basquin–Coffin–Manson relationship. The combined kinematic/isotropic hardening model in ABAQUS accurately predicts the hysteretic behavior of the material, showcasing the promising potential of Zn-22Al alloy for seismic damping applications.

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Section: Strain-life Relationshipmentioning

confidence: 99%