The Effect of thermomechanical Regim on Microstructure and Wear Resistance Behavoir of Experimentally Casted Alsimgalloy
| المصدر: | مجلة الأستاذ |
|---|---|
| الناشر: | جامعة طرابلس - نقابة أعضاء هيئة التدريس |
| المؤلف الرئيسي: | ElSahli, Y. A. (Author) |
| مؤلفين آخرين: | Hameda, A. A. (Co-Author) , Elhakimi, A. A. S. (Co-Author) , Elosta, H. (Co-Author) , Aboglaila, Z. (Co-Author) |
| المجلد/العدد: | ع8 |
| محكمة: | نعم |
| الدولة: |
ليبيا |
| التاريخ الميلادي: |
2015
|
| الشهر: | ربيع |
| الصفحات: | 4 - 19 |
| رقم MD: | 770419 |
| نوع المحتوى: | بحوث ومقالات |
| اللغة: | الإنجليزية |
| قواعد المعلومات: | EduSearch |
| مواضيع: | |
| كلمات المؤلف المفتاحية: |
Thermo-Mechanical Treatment | Cold Work | X-ray-Diffrac-Tion | Hardness Measurement | Wear Measurements
|
| رابط المحتوى: |
عدد مرات التحميل
3
| المستخلص: |
AL-1.5% Si-0.8% Mg alloy has been locally prepared and used to study the feasibility of using low temperature thermo-mechanical treatment (LTMT) for improving the wear resistance. Specimens for this study have been pre¬pared from the homogenized as-cast ingot. The specimens were subjected to solution treatment followed by plastic deformation for 8, 15 and 17 % reduction in thickness before aging at 150, 170 and 190 °C for 4 hours. The microstructure investigation showed an increase in the relative amount of Mg2Si with increasing the degree of deformation. X-ray diffraction analysis revealed a reduction in the lattice parameter of the matrix (Al-based solid solution) of the investigated alloy with increasing the percentage reduction in thickness. Hardness measurements showed that with increasing the percent¬age of cold work of Al-Si-Mg alloy with excess Si leads to a decrease in the maximum attainable hardness of artificially aged articles. For naturally aged articles, the contrary was true. Wear measurements of the investigated alloy under a load of 3.9 N for 500 m counter a cast iron disc revealed that the wear rate depends mainly on the hardness values of the articles. The investigation revealed that low temperature thermo-mechanical treatment of the studied alloy is not practically feasible for wear application. On the other hand, con¬ventional heat treatment is more feasible. |
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