Deformation Processing of Anisotropic Metals
Progress rept. no. 3, 1 Nov-31 Dec 1964
MASSACHUSETTS INST OF TECH CAMBRIDGE METALS PROCESSING LAB
Pagination or Media Count:
Elevated-temperature tensile test were carried out on the alloy Zircaloy 4. As in the case of the Ti alloy 2.5 Sn-4 A1, a very sharp maximum in strain rate sensitivity, m, was found at or near the alpha-beta transus. Elongation values again correlated with strain rate sensitivity however the maximum value of 220 was not as striking as in the titanium alloy. Values of strain ratio, R, were high in Zircaloy 4 approximately 4 at Rt and decreased with increasing testing temperature. For temperatures below 600 C, R was relatively constant with strain. In the range 600 to 800 C, R was found to increase remarkably after the onset of necking. In this temperature range necking occurred only in the width direction, leading to chisel-edged fractures showing 100 reduction in width and R values approaching infinity.
- Metallurgy and Metallography