تشکیل ترکیب بین‌فلزی Al3Ti در فصل مشترک اتصال زوج نفوذی آلومینیوم- تیتانیم از طریق انجام عملیات حرارتی نفوذی

نویسندگان

دانشکده مهندسی مواد، دانشگاه صنعتی مالک اشتر، شاهین‌شهر، اصفهان

چکیده

در این پژوهش، شکل‌گیری ترکیب بین‌فلزی Al3Ti در فصل مشترک اتصال آلومینیم- تیتانیم در حین فرایند جوشکاری قوس- تنگستن تحت پوشش گاز محافظ و عملیات حرارتی مورد بررسی واقع شده است. براساس نتایج حاصل، در حین انجام عملیات رسوب‌‌گذاری، لایه‌ ظریفی از ترکیب بین‌فلزی Ti3Al2 در فصل مشترک اتصال ایجاد می‌شود. طی انجام عملیات حرارتی در دمای 550 درجه سانتی‌گراد، این لایه به فاز بین‌فلزی Al3Ti تبدیل شده و شروع به رشد می‌کند. با انجام عملیات حرارتی در دماهای بالاتر، نرخ رشد لایه بین‌فلزی Al3Ti افزایش یافته و هم‌زمان با آن شکل‌گیری حفرات کرکندال، به هم پیوستن حفرات و جدایش زوج نفوذی از محل اتصال با آلومینیم اتفاق می‌افتد

کلیدواژه‌ها


عنوان مقاله [English]

The Formation of Al3Ti Intermetallic compound at the junction interface of Titanium-Aluminum diffusional Coupling by Means of Diffusional Annealing Process

نویسندگان [English]

  • M. Tavoosi
  • S. Arjmand
Department of Materials Engineering, Malek-Ashtar University of Technology (MUT), Shahin-Shahr, Isfahan, Iran.
چکیده [English]

In this study, the formation of the Al3Ti intermetallic compound at the junction interface of aluminum-titanium was investigated during deposition and annealing. The results illustrated that during the deposition process, one thin layer of Ti3Al2 intermetallic compound was created at the junction interface. During the annealing at 550 °C, this layer was transformed to the  Al3Ti intermetallic phase and the layer growth occurred. By performing annealing at higher temperatures, the growth rate of Al3Ti intermetallic layer was increased; at the same time, the formation of Kirkendall cavities and  coupling in the cavities and fragmentation of diffusional coupling from the junction with aluminum were observed

کلیدواژه‌ها [English]

  • Titanium aluminides
  • Diffusional annealing
  • Kirkendall effect
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