عنوان البحث(Papers / Research Title)
Investigation the Effect of Titanium on Adhesive Wear and Hardness of NiAl-Y2O3 Composite Material
الناشر \ المحرر \ الكاتب (Author / Editor / Publisher)
علي هوبي حليم الخزرجي
Citation Information
علي,هوبي,حليم,الخزرجي ,Investigation the Effect of Titanium on Adhesive Wear and Hardness of NiAl-Y2O3 Composite Material , Time 10/10/2021 9:44:28 PM : كلية هندسة المواد
وصف الابستركت (Abstract)
The current research topic is mainly focused on the wear characterization of particulate reinforced NiAl-Y2O3 composite and investigates the effect of Ti with various weight percentages (2, 2.5, and 3 wt. %) on the microstructure, hardness, and wear performance of NiAl-Y2O3 composite.
الوصف الكامل (Full Abstract)
In the present study, the nickel aluminide NiAl-based composite, reinforced with yttrium oxide Y2O3 with the addition of titanium, was prepared by sintering at 1350 °C for one and a half hours under argon gas atmosphere. Brinell hardness test was carried out according to (ASTM E140 – 12b). Titanium addition leads to an increase in hardness of (NiAl-Y2O3) composite. The increase in hardness is mainly due to increased NiAl-Y2O3 mechanical resistance when titanium is added by the solid-state solution strengthening, as well as by the high density (5.7514 g/cm3 ) and very low porosity (1.93%) of the final samples. The addition of 2 wt % Ti to the NiAl compound increases the hardness of the compound material (90NiAl 10Y2O3) to 295 HB and then increases to 330 HB by adding 2.5 wt. % Ti and continues to increase to 378 HB by adding (3 wt. % Ti). A wear test is carried out to find the wear characteristics of the composites developed by the powder metallurgy route. The results revealed that the addition of titanium leads to a decrease in the wear rate of NiAl-Y2O3. Addition of 2 wt. % Ti to (70NiAl-30Y2O3) leads to a reduction in adhesion-wear rate from (7.611 * 10-6 g/ cm) to (5.81* 10-6 g/ cm) and to (5.47*10-6 g / cm) by adding 2.5 wt. % Ti. The adhesion-wear ratio continues to decrease to 4.77 * 10-6 g/ cm by adding 3 wt. % Ti.
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