The Effect of Alumina (Al2O3) Volume Fraction and Stir casting Conditions on Porosity and Fatigue Life of Aluminum Matrix Composites
الكلمات المفتاحية:
جزء الحجم، الصب بالتحريك، عمر الكلال، المسامية، الألومينا، الألمنيوم، المادة المركبةالملخص
اكتسبت مركبات مصفوفة الألمنيوم (AMCs) اهتمامًا بحثيًا بسبب قوتها الممتازة إلى نسبة الوزن. تركز الورقة الحالية على التوصيف الميكانيكي والميكرو للمركبات الأساسية للألمنيوم المصبوب (AA6063) المقواة بثلاثة أجزاء حجمية من 150 ميكرومتر من جزيئات Al2O3. تم إنشاء العينات قيد الدراسة عن طريق الصب بالتقليب في درجات حرارة ذوبان مختلفة وسرعة التقليب. تم تقييم المركبات المنتجة المختلفة باستخدام قوة الشد والمسامية وعمر الكلال والفحص المجهري. أوضحت نتائج الاختبار أن مقاومة الشد وعمر التعب للمركب تزداد مع زيادة جزء الحجم لمحتوى جسيمات الألومينا. زادت المسامية مع زيادة نسبة حجم Al2O3 وانخفضت عند درجات الحرارة المرتفعة. لوحظت اختلافات في المسامية عندما اختلفت سرعة الخلط. كشفت دراسة البنية المجهرية أن جزيئات Micro- Al2O3 موزعة بشكل موحد في جميع أنحاء الألمنيوم.
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