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

مهندسی متالورژی و مواد

مقاله 2، دوره 36، شماره 1 - شماره پیاپی 37، فروردین 1404، صفحه 15-28   

نوع مقاله: علمی و پژوهشی

شناسه دیجیتال (DOI): 10.22067/jmme.2025.85986.1136

نویسنده

محمد علی پور^*

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

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

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