High cycle and very high cycle fatigue of TC17 titanium alloy: Stress ratio effect and fatigue strength modeling

G Li, L Ke, X Ren, C Sun - International Journal of Fatigue, 2023 - Elsevier
The fracture surface of TC17 alloy tends to exhibit facet characteristic at R> 0, but it presents
rough area morphology at R=− 1 for the internal crack initiation and early growth region. The …

Characteristic and mechanism of crack initiation and early growth of an additively manufactured Ti-6Al-4V in very high cycle fatigue regime

C Sun, W Chi, W Wang, Y Duan - International Journal of Mechanical …, 2021 - Elsevier
In this paper, very high cycle fatigue (VHCF) behavior of an additively manufactured (AM) Ti-
6Al-4V by selective laser melting process and post-heat treated by hot-isostatic pressing is …

In situ SEM investigation of slip transfer in Ti-6Al-4V: Effect of applied stress

S Hémery, P Nizou, P Villechaise - Materials Science and Engineering: A, 2018 - Elsevier
Slip transfer is a major concern to understand fatigue behavior and damage, especially in
titanium alloys. The presently reported investigation focused on the influence of the applied …

On the mechanism of fatigue and dwell-fatigue crack initiation in Ti-6Al-4V

C Lavogiez, S Hémery, P Villechaise - Scripta Materialia, 2020 - Elsevier
In the present study, the mechanism of fatigue and dwell-fatigue crack initiation was
investigated in Ti-6Al-4V with a bi-modal microstructure. While substantial dwell-fatigue life …

The mechanism of internal fatigue-crack initiation and early growth in a titanium alloy with lamellar and equiaxed microstructure

X Pan, S Xu, G Qian, A Nikitin, A Shanyavskiy… - Materials Science and …, 2020 - Elsevier
Traditionally, equiaxed α grains rather than lamellar microstructure (LM) domains in titanium
alloys are regarded as potential internal crack origins in high-cycle fatigue (HCF) and very …

Experimental investigation and crystal plasticity simulation for the fatigue crack initiation of the equiaxed Ti-6Al-4V alloy in the very high cycle regime

C Chen, T Gao, T Chen, B Li, Z Qin, R Chen… - Engineering Failure …, 2023 - Elsevier
This work investigated the fatigue crack initiation mechanism of the equiaxed Ti-6Al-4V alloy
in the very high cycle fatigue (VCHF) regime. Ultrasonic fatigue experiments were carried …

Gas pore-based fatigue strength and fatigue life prediction models of laser additive manufactured Ti-6Al-4V alloy in very high cycle fatigue regime

G Sun, J Zheng, Z Zhao - Materials Science and Engineering: A, 2025 - Elsevier
Due to the high-density energy input characteristics of laser additive manufacturing (AM),
gas pores are often as high-frequency defects in additive manufacturing materials, which …

[HTML][HTML] Characteristics and micromechanisms of fish-eye crack initiation of a Ti-6Al-4V alloy in very high cycle fatigue regime

T Gao, X Zhao, H Xue, Z Sun - Journal of Materials Research and …, 2022 - Elsevier
The fracture surface characteristics and the associated micromechanisms governing the fish-
eye crack initiation of a Ti-6Al-4V alloy under very high cycle fatigue (VHCF) loading are …

Characterization of internal fatigue crack initiation in Ti‐6Al‐4V alloy via synchrotron radiation X‐ray computed tomography

F Yoshinaka, T Nakamura, H Oguma… - Fatigue & Fracture of …, 2023 - Wiley Online Library
The initiation of internal fatigue cracks in very high cycle fatigue of Ti‐6Al‐4V alloy was
investigated using synchrotron radiation X‐ray computed tomography (SR‐CT). Micro‐CT …

[HTML][HTML] Effect of surface high-density twinned structure on the fatigue crack initiation of Ti–6Al–4V

Z Niu, G Hu, P Gai, D Wei, C Wang, W Zhou… - Journal of Materials …, 2024 - Elsevier
Fatigue crack initiation sites would transfer from surface to subsurface of metal specimens
through shot peening (SP) or laser shock surface strengthening. This phenomenon is …