Abstract
Abstract The effects of Ti additions (0, 0.4, 0.6, 0.8, 1.0, 1.2 wt.%) on the microstructure and mechanical properties of as-cast and aging Mg-0.4%Zn-1.0%Zr-1.5%Ca (wt.%) alloys were investigated. The results indicated that minor Ti can effectively refine grains, while excessive Ti addition resulted in the grain coarsening. When the content of Ti was 0.8 wt.%, the as-cast alloy exhibited the finest grain size of 39 μm which contributed to the optimal mechanical properties with Brinell hardness of 57.9 HB, ultimate tensile strength of 145 MPa and elongation of 3.2%. After T6 heat treatment, the continuous net-like Mg2Ca and Mg6Zn3Ca2 phases changed to uniform massive T phases (ternary Mg–Zn–Ca phases) and dispersive halo-like precipitates (Mg2Ca and Mg6Zn3Ca2 phases). The ultimate tensile strengths of the alloy at room temperature (RT), 175 °C and 200 °C were correspondingly improved to 182 MPa, 169 MPa and 141 MPa, respectively.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
