%0 Journal Article
%T Influence of Plastic Deformation  and Aging Process on Microstructure  and Tensile Properties of Cast Ti-6Al-2Sn-2Zr-2Mo-1.5Cr-2Nb-0.1Si Alloy
%A Mostafa S. S. El-Deeb
%A Khaled M. Ibrahim
%A S. S. Mohamed
%A Ramadan N. Elshaer
%J Open Journal of Metal
%P 11-20
%@ 2164-277X
%D 2021
%I Scientific Research Publishing
%R 10.4236/ojmetal.2021.112002
%X In the present work, titanium alloy with a composition of 
Ti-6.5Al-3Mo-1.9Nb-2.2Sn-2.2Zr-1.5Cr (TC21) was subjected to plastic deformation and aging processes. A Plastic deformation at room temperature with 2%, 3% and 4% stroke strain was applied on the studied samples. Then, the samples aged at 575<span style=\"white-space:nowrap;\">¡ã</span>C for 4 hr. By applying different plastic deformation ratios, the structure revealed an elongated and thin <em>¦Â</em>-phase embedded in an <em>¦Á</em>-phase. Secondary <em>¦Á</em>-platelets were precipitated in the residual <em>¦Â</em>-phase. Maximum hardness (HV440) was obtained for 4% deformed + aged samples. Minimum hardness (HV320) was recorded for the as-cast samples without deformation. The highest ultimate tensile strength of 1311 MPa was obtained for 4% deformed + aged samples due to presence of high amount of dislocation density as well as precipitation of secondary <em>¦Á</em>-platelets in the residual <em>¦Â</em>-phase. The lowest ultimate tensile strength of 1020 MPa was reported for as-cast samples. Maximum elongation of 14% was registered for 4% deformed + aged samples and minimum one of 3% was obtained for as-cast samples. Hence, strain hardening + aging can enhance considerably the elongation of TC21 Ti-alloy up to 366% and 133% in case of applying 4% deformation + aged compared to as-cast and aged samples without applying plastic deformation, respectively.
%K TC21 Ti-Alloy
%K Strain Hardening
%K Microstructure
%K Aging
%K Hardness
%K Tensile
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=109889