Investigation of the annealing texture evolution in hafnium

Journal Article · Sun Mar 01 04:00:00 EST 1998 · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science

DOI:https://doi.org/10.1007/s11661-998-0266-z· OSTI ID:616431

Bai, R; Briant, C L; Paine, D C; Beresford, J R ^[1]

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1. Brown Univ., Providence, RI (United States). Div. of Engineering

This article presents a study of the evolution of the annealing texture in hafnium, as measured by electron backscattering diffraction patterns (EBSPs). It was found that the annealing texture of as-received extruded rod depended on the annealing temperature. After low-temperature recrystallization, the deformation axis was parallel to [11{bar 2}0] or [{bar 1}2{bar 1}0] and the basal planes were approximately parallel to the deformation axis. These orientations were deduced by the position of the points in the standard stereographic triangle used to produce the inverse pole figure. As the annealing temperature was raised to 1,700 C, the direction parallel to the rolling direction changed to [01{bar 1}0] and the grain size increased. It appeared that the increase in grain size occurred by a process of abnormal grain growth, and this abnormal grain growth appeared to be the cause of the change in the texture. Texture was also examined in samples that had been warm rolled to thickness reductions between 10 and 90% and then annealed at 1,700 C. In these samples, the main feature of the texture was that the basal plane became parallel to the rolling plane as the amount of rolling increased. The maximum grain size was observed in samples that had been rolled to a reduction in thickness of 50%.

• Sponsoring Organization: USDOE
• OSTI ID: 616431
• Journal Information: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Journal Name: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science Journal Issue: 3 Vol. 29; ISSN 1073-5623; ISSN MMTAEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
DEFORMATION
GRAIN GROWTH
HAFNIUM
TEMPERATURE DEPENDENCE
TEXTURE