تاثیر افزودن نانو صفحات دی سولفید تنگستن بر ریزساختار و خواص مکانیکی نانوکامپوزیت ریختگی Al-10Zn-3.5Mg-2.5Cu

نوع مقاله : علمی و پژوهشی

نویسنده

• محمد علی پور

گروه مهندسی مواد- دانشکده مکانیک-دانشگاه تبریز- تبریز-ایران

10.22067/jmme.2025.85986.1136

چکیده

در این تحقیق تاثیر افزودن نانوصفحات دی سولفید تنگستن بر ریزساختار و خواص مکانیکی نانو کامپوزیت آلیاژ آلومینیوم Al-10Zn-3.5Mg-2.5Cu تولید شده به روش متالورژی پودر و ریخته گری بررسی شده است. در این تحقیق ابتدا پیش سازه حاوی نانوصفحات دی سولفید تنگستن و پودر خالص آلومینیم ساخته شده و در ادامه این پیش سازه به مذاب اضافه می شود. وجود نانوصفحات دی سولفید تنگستن پراکنده با سطح ویژه بالا به طور قابل توجهی استحکام نانوکامپوزیت را افزایش می دهد. مطالعات ریزساختاری آلیاژ نشان داد که افزودن نانوصفحات دی سولفید تنگستن باعث کاهش اندازه دانه می شود. بررسی‌های بیشتر روی آزمایش‌ کششی نشان داد که افزودن نانوصفحات استحکام کششی نهایی را افزایش می‌دهد. عملیات حرارتی T6 استحکام نهایی نمونه های نانوکامپوزیت را بطور چمگیری افزایش می دهد. با افزودن مقدار نانوصفحات بالاتر از 0.7 درصد وزنی، وجود کلوخه نانوصفحه دی سولفید تنگستن در مرزهای دانه به عنوان مسیر مطلوب برای رشد ترک ایجاد می شود. نانوکامپوزیت حاوی 0.7 درصد نانوصفحات دی سولفید تنگستن بعد از عملیات حرارتی پیرسختی استحکام کششی 535 Mpa را نشان می دهد.

کلیدواژه‌ها

• کامپوزیت های زمینه فلزی (MMCs)
• خواص مکانیکی
• ریزساختارها
• فرآیند پودی
• عملیات آلتراسونیک

موضوعات

• ریخته گری و انجماد

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عنوان مقاله [English]

The effect of adding tungsten disulfide nanoplates on the microstructure and mechanical properties of cast Al-10Zn-3.5Mg-2.5Cu nanocomposite

نویسنده [English]

• Mohammad Alipour

Faculty of Mechanical engineering, Department of Materials Engineering, University of Tabriz, Iran

چکیده [English]

In this research, the effect of adding tungsten disulfide nanosheets on the microstructure and mechanical properties of Al-10Zn-3.5Mg-2.5Cu aluminum alloy nanocomposite produced by powder metallurgy and casting method has been investigated. In this research, first, a pre-structure containing tungsten disulfide nanoplates and pure aluminum powder is made, and then this pre-structure is added to the melt. The presence of dispersed tungsten disulfide nanosheets with high specific surface area significantly increases the strength of the nanocomposite. Microstructural studies of the alloy showed that the addition of tungsten disulfide nanosheets reduces the grain size. Further investigations on the tensile test showed that the addition of nanosheets increased the ultimate tensile strength. T6 heat treatment increases the final strength of nanocomposite samples. By adding nanoplates above 0.7% by weight, the presence of tungsten disulfide nanoplate clumps in the grain boundaries is created as a favorable path for crack growth. The nanocomposite containing 0.7% of tungsten disulfide nanoplates shows a tensile strength of 535 Mpa after heat treatment.

کلیدواژه‌ها [English]

• Metal matrix composites (MMCs)
• Mechanical properties
• Microstructures
• Powder processing
• Ultrasonic treatment

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