✦ LIBER ✦

Slip-induced fracture of polycrystalline Cr, Mo and W: The group VIa B.C.C. Transition metals

✍ Scribed by A. Wronski; A. Fourdeux

Book ID: 104655617
Publisher: Springer Netherlands
Year: 1965
Tongue: English
Weight: 479 KB
Volume: 1-1
Category: Article
ISSN: 1573-2673
DOI: 10.1007/bf00186745

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✦ Synopsis

The fracture properties of Cr, Mo and W are reviewed, as studied by tensile testing and fractographic (optical and electron microscopic) techniques for bulk specimens and directly for thin foils by stretching inside the electron microscope, The differences rather than the similarities between these metals and the others of the body-centered cubic transition group, V, Fe, Nb and Ta, are stressed. For melted Cr, Mo and W, temperature regions of slip-induced cleavage extending 100°K or more had been reported, and this fracture mechanism is considered. Details of both dislocation theories and experimental observations do not allow for more than an order-of-magnitude calculation of the cleavage fracture stress.

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