Neutron diffraction study of ordering in the γ-phase of the aluminium-magnesium system

✍ Scribed by Prof. N. N. Sirota; V. N. Nekrasov

• Publisher: John Wiley and Sons
• Year: 1976
• Tongue: English
• Weight: 373 KB
• Volume: 11
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.19760110410

✦ Synopsis

Abstract

In the present work neutron diffraction study is made of the ordering effekt within the whole region of the existence of the γ‐phase of the Al‐Mg system. Depending on thermal treatment conditions, the order coefficient S varies from 0.15 to 0.7 for compounds containing 59 and 60 at.% Mg at temperatures ∼330 and below 150°C, respectively. – At decreased annealing temperatures the ordinate of the highest ordering is shown to approach the composition which may be approximately characterized as Al~2~Mg~3~. The temperature increase results in the decrease of the ordering degree, and the ordinate of the highest ordering displaces to the composition which may be expressed as Al~12~Mg~17~. – Kurnakov's point is determined which is lying at ∼330°C for the composition containing 59 at.% Mg.