|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Magnesium Alloy Development: An LMD Symposium in Honor of Karl Kainer
||Development and Characterization of Mg-4Zn-0.5Ca-0.16 Mn (wt. %) Alloy for Biomedical Applications
||Partha Duley, Souriddha Sanyal, Tapas Kumar Bandyopadhyay, Sumantra Mandal
|On-Site Speaker (Planned)
A Mg-4Zn-0.5Ca-0.16Mn (wt.%) alloy consisting of all biocompatible elements was developed using melting-casting route. The as-cast microstructure comprises of coarse α-Mg grains (~90Ám) and networks of coarser eutectic Ca2Mg6Zn3 with finer α-Mn phases at the grain boundaries resulting in poor ductility and strength. After homogenizing, the second phases dissolve back into the matrix without significant change in the grain size resulting in moderate strength and ductility. The specimens were deformed using a hard plate hot forging method to minimize the chances of cracking. Upon annealing, a good combination of strength (UTS~240 MPa) and ductility (~19% elongation) was achieved. This has been attributed to the combined effect of multimodal grain structures, higher fraction of fine Mn rich precipitates and presence of <c+a> dislocations with cross slip. The fine incoherent Mn rich precipitates have larger misfits with the matrix inducing a pinning effect on dislocation movement and boundary migration.