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4. Conclusion
Heat treatment of zirconium and hafnium alloys is an integral part of the alloy transformation process; it not only determines performance (product quality, absence of defects, cracks, etc.), but also properties (texture and mechanical properties or, more generally, deformation properties, including under irradiation, corrosion, etc.).
It is therefore vital to control them, and tolerances on temperatures and treatment times are always clearly specified, often within narrow ranges. Numerical modeling is an invaluable tool for validating and specifying these heat treatments.
Many lines of research are still open, such as the evolution of textures during recrystallization or even more so during quenching operations, the modeling of recrystallization after work-hardening or during hot deformation, and the determination of residual stresses....
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Conclusion
Glossary
Bibliography
Standardization
Most standards for zirconium and hafnium metal products, or alloys, are American ASTM standards. A few French standards also exist. Few standards concern hafnium.
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French standards
- Corrosion of metals and alloys – Aqueous corrosion testing of zirconium alloys used in nuclear reactors. - NF EN ISO 10270 - Juillet 2008
- Description and qualification...
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