Study on small crack growth behavior of laser powder bed fused Ti6Al4V alloy

Wu, Liangliang; Jiao, Zehui; Yu, Huan

doi:10.1111/ffe.13725

Cited by 10 publications

(2 citation statements)

References 38 publications

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“…All these studies show that the fatigue performance of the SLM-printed Ti-6Al-4V is entirely different from the other standard (α-β) Ti-6Al-4V, which affects both the static and dynamic life of the components. [14][15][16][17] Furthermore, studies on the fatigue behavior of SLM-printed Ti-6Al-4V lattice structures are limited. 18,19 Different methods have been used to enhance the fatigue life of the SLM-printed Ti-6Al-4V components like heat treatment, sand-blasting, and surface modification.…”

Section: Introductionmentioning

confidence: 99%

“…There have been many studies on the compressive fatigue behavior of the selective laser melting (SLM)‐printed Ti‐6Al‐4V component. All these studies show that the fatigue performance of the SLM‐printed Ti‐6Al‐4V is entirely different from the other standard (α‐β) Ti‐6Al‐4V, which affects both the static and dynamic life of the components 14–17 . Furthermore, studies on the fatigue behavior of SLM‐printed Ti‐6Al‐4V lattice structures are limited 18,19 .…”

Section: Introductionmentioning

confidence: 99%

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Effect of heat treatment on the variable amplitude fatigue life and microstructure of the novel bioinspired Ti‐6Al‐4V thin tubes fabricated using Selective Laser Melting process

Sharma

Hiremath

Kenchappa

2022

Fatigue Fract Eng Mat Struct

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In this study, thin tubes are mimicked based on the architecture of Euplectella aspergillum and studied for fatigue performance under variable amplitude loading. The thin tubes are fabricated with Ti-6Al-4V material using the selective laser melting (SLM) process. SLM printed components are always subjected to residual stresses, which can reduce fatigue performance of the components. Heat treatment effect on the fatigue performance, microstructure, and residual stress is studied. Complex geometry and sharp corners in the bioinspired tubes result in stress concentration, which further reduces the fatigue performance. The value of residual stresses at the sharp corners is dependent on the height of the tube, thickness of struts, and intersection of different struts. Heat treatment significantly reduces the residual stresses and increases the fatigue life of the thin tubes; however, strength decreases after heat treatment. Heat-treated thin tubes showed a higher concentration of (α + β) phase, which results in decreased residual stress and improved ductility of the thin tubes. Advanced bionic thin tubes can be used for lightweight crash boxes, sandwich panels, bio-implants, grid stiffened structures, etc.

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