A Ductile Fracture Criterion of Ti-6Al-4V at Room Temperature

Vilotić, Dragiša; Movrin, Dejan; Alexandrov, Sergei

doi:10.1007/s11340-016-0210-x

Cited by 1 publication

(3 citation statements)

References 37 publications

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“…On the contrary, there are many experimental evidences in literature of failure occurring under STR lower than −1/3, (see e.g. Longère and Dragon (2015) or Vilotic et al. (2016)) , so that shear decohesion is not bounded in the negative stress triaxiality range by a value of −1/3.…”

Section: Discussionmentioning

confidence: 97%

“…On the contrary, there are many experimental evidences in literature of failure occurring under STR lower than -1/3, (see e.g. Longère and Dragon (2015) or Vilotic et al (2016) ), so that shear decohesion is not bounded in the negative stress triaxiality range by a value of -1/3. In addition, an overall nil (and even negative) stress triaxiality at the macroscale does not necessarily imply that the stress triaxiality is nil or negative everywhere at the micro-scale, as shown in Longère and Dragon (2015), which explains the coexistence of smooth, sheared areas and dimple clusters in specimens after shear-compression loading until fracture.…”

Section: Compression-shear Loadingmentioning

confidence: 97%

“…(2018), but their application to Ti-6Al-4V was limited to yield surface predictions at various temperatures. Vilotic et al. (2016) performed confined ring upsetting tests on Ti-6Al-4V.…”

Section: Introductionmentioning

confidence: 99%

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Anisotropic, rate-dependent ductile fracture of Ti-6Al-4V alloy

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Doquet

Longère

et al. 2021

International Journal of Damage Mechanics

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An extensive experimental campaign was run to investigate the influence of the loading direction, stress state (triaxiality ratio ranging from −0.5 to 1), and strain rate (from 10−3 to 1.5x103s−1) on the ductile fracture of Ti-6Al-4V titanium alloy. Microscopic and macroscopic observations provided some insight into the shear-driven or micro-voiding-controlled damage mechanisms prevailing at low and high triaxiality ratios, respectively. Numerical simulations were run to determine the local loading paths to fracture in terms of plastic strain as a function of stress triaxiality ratio and Lode parameter. The ductility was found to be anisotropic, but only weakly dependent on the strain rate in the considered range. The anisotropy in ductility was different in tension (maximum along DD) and in compression (maximum along ND). The fracture strain decreased with the absolute value of the triaxiality, with a maximum close to zero. No clear correlation with the Lode parameter was found.

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Section: Discussionmentioning

confidence: 97%