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arXiv · 1607.07722

Three-dimensional investigation of void growth leading to fracture in commercially pure titanium

M. Pushkareva·J. Adrien·E. Maire·J. Segurado·J. Llorca·A. Weck
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Abstract

The fracture process of commercially pure titanium was visualized in model materials containing artificial holes. These model materials were fabricated using a femtosecond laser coupled with a diffusion bonding technique to obtain voids in the interior of titanium samples. Changes in void dimensions during in-situ straining were recorded in three dimensions using x-ray computed tomography. Void growth obtained experimentally was compared with the Rice and Tracey model which predicted well the average void growth. A large scatter in void growth data was explained by differences in grain orientation which was confirmed by crystal plasticity simulations. It was also shown that grain orientation has a stronger effect on void growth than intervoid spacing and material strength. Intervoid spacing, however, appears to control whether the intervoid ligament failure is ductile or brittle.

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M. Pushkareva, J. Adrien, E. Maire, J. Segurado, J. Llorca, A. Weck. 2016-07-26. Three-dimensional investigation of void growth leading to fracture in commercially pure titanium. https://doi.org/10.1007/978-3-319-48762-5_9

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