Annealing effects on the reordering of severe plastic deformed boron doped Ni3Al
Identifieur interne : 000663 ( Main/Exploration ); précédent : 000662; suivant : 000664Annealing effects on the reordering of severe plastic deformed boron doped Ni3Al
Auteurs : Atef Korchef [Tunisie] ; Abdelwahab Kolsi [Tunisie] ; Nabil Njah [Tunisie]Source :
- Journal of materials science [ 0022-2461 ] ; 2007.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Dopage.
English descriptors
Abstract
X-ray diffraction (XRD) and differential scanning calorimetry (DSC) were used to investigate the reordering process of a partially disordered Ni76Al24 (0.2 wt.%B) powder with annealing times and temperature. The long-range order parameter varied linearly with temperature and a significant ordered state was observed at 773 K. The DSC measurements showed one main exothermal peak in the temperature range of 493-913 K. The maximum rate of energy release occurred at 763± 2 K with a total thermal effect of AH = 52± 9 j/g. The DSC peak showed a shoulder around its maximum temperature of 763 ± 2 K which was attributed to order stabilization. The presence of boron in the alloy enhanced the transformation temperature by increasing the enthalpy of vacancies migration without affecting the reaction enthalpy.
Affiliations:
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Le document en format XML
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The long-range order parameter varied linearly with temperature and a significant ordered state was observed at 773 K. The DSC measurements showed one main exothermal peak in the temperature range of 493-913 K. The maximum rate of energy release occurred at 763± 2 K with a total thermal effect of AH = 52± 9 j/g. The DSC peak showed a shoulder around its maximum temperature of 763 ± 2 K which was attributed to order stabilization. The presence of boron in the alloy enhanced the transformation temperature by increasing the enthalpy of vacancies migration without affecting the reaction enthalpy.</div></front></TEI><affiliations><list><country><li>Tunisie</li></country></list><tree><country name="Tunisie"><noRegion><name sortKey="Korchef, Atef" sort="Korchef, Atef" uniqKey="Korchef A" first="Atef" last="Korchef">Atef Korchef</name></noRegion><name sortKey="Kolsi, Abdelwahab" sort="Kolsi, Abdelwahab" uniqKey="Kolsi A" first="Abdelwahab" last="Kolsi">Abdelwahab Kolsi</name><name sortKey="Njah, Nabil" sort="Njah, Nabil" uniqKey="Njah N" first="Nabil" last="Njah">Nabil Njah</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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