SYMPOSIA PAPER Published: 01 January 1984
STP34463S

Characteristics of Hydrostatically Extruded Zr-2.5Nb Alloy

Source

Hydrostatic extrusion is a new production technology. Zr-2.5Nb alloy tubes cold hydrostatically extruded possess excellent mechanical properties similar to heat-treated tubes and better than cold-worked tubes. Examination by transmission electron microscope shows that the alloy is of a uniform cell substructure containing the (α + β) phases, which is one of important factors improving properties of the alloy.

The study of texture, stress, and reorientation of the hydride shows that hydrostatically extruded tubes with basal plane normals in the radial direction have obviously higher hydride reorientation threshold stress than tubes with basal plane normals in the circumferential direction.

Moreover, investigation of fracture toughness reveals that hydride distributed perpendicular to the crack propagation direction restrains further propagation of the crack. It is favorable for preserving the fracture resistance of the material.

Author Information

Jie, Z
General Research Institute for Non-ferrous Metal, MMI, Beijing, China
Zhenhe, L
General Research Institute for Non-ferrous Metal, MMI, Beijing, China
Wenxian, H
General Research Institute for Non-ferrous Metal, MMI, Beijing, China
Yunxia, Z
General Research Institute for Non-ferrous Metal, MMI, Beijing, China
Jiaqi, D
General Research Institute for Non-ferrous Metal, MMI, Beijing, China
Yan, L
General Research Institute for Non-ferrous Metal, MMI, Beijing, China
Tieqi, Y
General Research Institute for Non-ferrous Metal, MMI, Beijing, China
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Developed by Committee: B10
Pages: 73–87
DOI: 10.1520/STP34463S
ISBN-EB: 978-0-8031-4895-6
ISBN-13: 978-0-8031-0270-5