Abstract
Aiming to investigate the effects of nano β-tricalcium phosphate (β-TCP) on the hot deformation mechanism of Mg-Zn-Zr alloy (MZZ) and confirm the optimum hot working conditions of 2β-TCP/Mg-3Zn-0.8Zr composites (MZZT), thermal simulation test at deformation temperature and strain rate in the range of 523–673K and 0.001–1s−1 was performed on MZZ and MZZT by using Gleeble-1500 simulator. The results of strain-stress behavior indicated that the flow stress of MZZT is higher than that of MZZ under the same hot deformation condition in the deformation temperature range of 523–623K, whereas this trend opposed when specimens deformed at 673K. Based on the establishment of constitutive equation, the average activation energy of MZZT for hot deformation is calculated to be 184.1kJ/mol, and almost 60kJ/mol higher than that of MZZ which can be attributed to the increasing of deformation resistance after the addition of β-TCP particles. Furthermore, according to the processing map constructed at strains of 0.8 and microstructure observation, the optimum hot working condition for MZZT with higher value of power dissipation (37%) is determined to be 600–645K and 0.01–0.001s−1.
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.
