Adeosun S. Oluropo and Sekunowo O. Israel and Talabi S. Isaac
Combined Effect of Cold Rolling and Heat Treatment on the Mechanical Properties of AlTi Alloy
235 - 240
2014
8
3
International Journal of Materials and Metallurgical Engineering
https://publications.waset.org/pdf/9997898
https://publications.waset.org/vol/87
World Academy of Science, Engineering and Technology
This study investigated the combined effect of cold rolling and heat treatment on the mechanical properties of AlTi alloy. Samples of the alloy are cast in metal mould to obtain 0.942.19wt mixes of titanium. These samples are grouped into untreated (ascast) and those that are cold rolled to fifty percent reduction, homogenized at 5000C and soaked for one hour. The cold rolled and heat treated samples are normalized (RTn) and quenchtempered (RTqt) at 1000C. All these samples are subjected to tensile, microhardness and microstructural evaluation. Results show remarkable improvement in the mechanical properties of the cold rolled and heat treated samples compared to the ascast. In particular, the RTqt samples containing titanium in the range of 1.72.2 demonstrates improve tensile strength by 24.7, yield strength, 28, elastic modulus, 38.3 and microhardness, 20.5. The Al3Ti phase being the most stable precipitate in the αAl matrix appears to have been responsible for the significant improvement in the alloy’s mechanical properties. It is concluded that quench and temper heat treatment is an effective method of improving the strengthstrain ratio of cold rolled Al.0.92.2Ti alloy.
Open Science Index 87, 2014