Titanium, Zirconium, and Hafnium

Froes, F. H.; Yau, Te‐Lin; Weidinger, H

doi:10.1002/9783527603978.mst0086

Cited by 11 publications

(13 citation statements)

References 25 publications

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“…Dès 1940, les propriétés physiques et mécaniques étaient bien établies. En 1948, ICI Metals (Grande-Bretagne) en lança la production industrielle et l'année suivante, Remington Arms (États-Unis) adopta le procédé Kroll [62]. En 1952, le Japon créa l'Osaka Titanium, puis l'URSS s'engagea dans la même voie.…”

Section: Historiqueunclassified

“…La phase a prédomine à une température inférieure à 540°C, mais elle est rarement pure : une fraction de l'alliage se présente sous forme b. À 882°C, un changement allotropique conduit à la formation de la phase b. Cette phase coexiste également avec la phase a jusqu'à 1000°C, où elle devient la seule phase existante. Ces températures sont modifiées si des éléments sont ajoutés [62,63]. Il s'agit de stabilisateurs répar-tis en trois classes, pouvant favoriser les phases a, b ou les deux.…”

Section: Structure Des Alliagesunclassified

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Sélection des matériaux pour la conception et le développement du boîtier d'un cœur artificiel total implantable : supériorité du titane et de ses alliages

Guidoin

2004

ITBM-RBM

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Section: Historiqueunclassified

Section: Structure Des Alliagesunclassified

Sélection des matériaux pour la conception et le développement du boîtier d'un cœur artificiel total implantable : supériorité du titane et de ses alliages

Guidoin

2004

ITBM-RBM

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“…The major application of metallic zirconium is in the nuclear industry, due to its low thermal neutron cross-section, very good aqueous corrosion resistance and enough strength at high temperature. For nuclear applications, hafnium must be removed, due to its extremely high absorption for thermal neutrons: almost 600 times larger than that of zirconium [1,2]. Reactor-grade zirconium containing less than 100 ppm hafnium is frequently alloyed with tin, iron, chromium, and occasionally with nickel to improve mechanical properties and corrosion resistance in water and steam at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Rolling and recrystallization behavior of pure zirconium and zircaloy-4

Zimmermann

Padilha

2019

Matéria (Rio J.)

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Rolling and recrystallization of pure zirconium and zircaloy-4 have been studied comparatively in this paper. For the as-received condition, zirconium presented a recrystallized microstructure and the alloy a typical basketweave microstructure. Comparative rolling tests were performed, and reduction limit curves as a function of the rolling temperature were determined. At room temperature, pure Zr shows substantial plasticity and the alloy presents low ductility and many cracks. The ductility of both materials increases significantly with an increase in rolling temperature at the range between 300 and 500ºC. In static recrystallization studies, samples of the two materials with similar recrystallized grain size were cold-rolled with a thickness reduction of 55%. During annealing, pure Zr and the alloy soften by recovery and recrystallization, however the relative contribution of recovery is lesser pronounced in the alloy, for which the recrystallization temperature increases by about 60°C.

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“…[1][2][3][4][5] One of the ways to get around this problem is by use of a near-net shape (NNS) process such as powder metallurgy (PM). [6][7][8][9] This paper addresses NNS titanium PM fabrication methods including prealloyed (PA) and blended elemental (BE) techniques, and metal injection molding (MIM).…”

Section: Introductionmentioning

confidence: 99%