摘要
A novel low-cost Mg-Al-Ca-Zn-Mn-based alloy was developed to simultaneously improve its strength and ductility.The high yield strength of 411 MPa and the high elongation to failure of~8.9%have been achieved in the as-extruded Mg-1.3Al-1.2Ca-0.5Zn-0.6Mn(wt%)sample.Microstructure characterizations showed that the high strength is mainly associated with the ultra-fined dynamically recrystallized(DRXed)grains.Moreover,high-density dislocations in the un-DRXed region and nano-precipitates are distributed among theα-Mg matrix.The high ductility property can be ascribed to the high volume fraction of DRXed grains with a much randomized texture,as well as the formations of high-density subgrains in the un-DRXed grain regions.
基金
supported by National Key Research and Development Program of China (No. 2021 YFB3701000)
the National Natural Science Foundation of China (Nos. U2167213 and 51971053)
the Young Elite Scientists Sponsorship Program by China Association for Science and Technology (Nos. 2019-2021QNRC001, 20192021QNRC002, and 2019-2021QNRC003)
and the Fundamental Research Funds for the Central Universities (No. N2202020)
