Abstract
In polycrystalline materials grain boundaries provide an important contribution to the resistance to the propagation of both brittle and ductile cracks. In this paper we describe experimental measurements of brittle cracks developed within both small punch and matchstick test specimens of polycrystalline hcp zinc. These specimens were tested over the temperature range 77 to 423K. Fractography undertaken using focussed ion beam imaging provides detail of the propagation from grain to grain and across {10-12}twins of (0001) basal and {10-10} prismatic cleavage cracks. The results are discussed by comparison with the predictions from previously described 3-D geometric modelling applied to this hcp polycrystalline
material.
Translated title of the contribution | The Brittle Fracture of Polycrystalline Zinc |
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Original language | English |
Pages (from-to) | 41 - 44 |
Number of pages | 4 |
Journal | Key Engineering Materials |
Volume | 348-349 |
Publication status | Published - 2007 |
Bibliographical note
Publisher: Trans Tech Publications, SwitzerlandOther: http://www.scientific.net/0-87849-448-0/1.html