Precipitation phenomena in A Nb (1% nom) Zr alloy

Florent Casteels

Precipitation phenomena in A Nb (1% nom) Zr alloy

Florent Casteels

Research output › peer-review

Abstract

The ageing behaviour of a Nb-1% Zr alloy was determined at 800° C and 900° C for periods up to 500 hrs. The changes in structure and mechanical properties have been determined by X-ray analysis, microscopy, electron microscopy, electron diffraction and by hardness and tensile test measurements at room temperature. The presence of interstitials (especially oxygen) and the substitutional element zirconium in nobium promotes a precipitation process after adequate heat treatments.
Prior to precipitation some ordering of the interstitial atoms occurs in the (Nb, Zr) matrix; the presence of a precipitate with an undetermined transition structure has been observed while zirconium dioxide seems to be the main precipitate when overaging has occurred.

Original language	English
Publisher	SCK CEN
Number of pages	15
State	Published - Oct 1964

Publication series

Name	SCK CEN Reports
Publisher	SCK CEN
No.	BLG-320

Cite this

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AB - The ageing behaviour of a Nb-1% Zr alloy was determined at 800° C and 900° C for periods up to 500 hrs. The changes in structure and mechanical properties have been determined by X-ray analysis, microscopy, electron microscopy, electron diffraction and by hardness and tensile test measurements at room temperature. The presence of interstitials (especially oxygen) and the substitutional element zirconium in nobium promotes a precipitation process after adequate heat treatments. Prior to precipitation some ordering of the interstitial atoms occurs in the (Nb, Zr) matrix; the presence of a precipitate with an undetermined transition structure has been observed while zirconium dioxide seems to be the main precipitate when overaging has occurred.

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