Heating and cooling
Heat treatment of zirconium and hafnium alloys

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M1345 V1 Article

Heating and cooling


Heat treatment of zirconium and hafnium alloys

Author : Pierre BARBERIS

Publication date: March 10, 2018 | Lire en français

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1. Heating and cooling

Recall that pure zirconium and hafnium exhibit an allotropic transformation from the α-phase (hexagonal compact) at low temperature to the β-phase (cubic centered) at high temperature. The phase-change temperature is 863°C for zirconium and 1,760°C for hafnium.

1.1 Heat equation

The heat equation is written :

ρdH dt+divΦ=Q( 1 )

with :

ρ...
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