Synergistic coupling of Mn-doped skeleton and Mg-toughened matrix: towards a heat-resistant Al-La-Mg-Mn alloy
MATERIALS RESEARCH LETTERS(2024)
Abstract
Thermally stable three-dimensional (3D) skeleton coupled with the Mg-toughened matrix is employed to enhance the high-temperature strength in an Al-La-Mg-Mn alloy fabricated via laser powder bed fusion. The 3D skeleton exhibits a network and trans-granular structure with submicron cells, providing effective boundary strengthening to counter conventional grain boundary softening at elevated temperatures. Notably, Mn-doping introduces nanoscale Al6Mn precipitates into the skeleton, inducing additional microcracks that aid deformation coordination yet are buffered by the high-Mg toughened alpha-Al matrix during deformation. Quantitatively, the network structure contributes to over 30% and 40% yield strength increments at 200 degrees C and 300 degrees C, respectively.
MoreTranslated text
Key words
Laser powder bed fusion,Al-La-Mg-Mn alloy,stable skeleton,high-temperature mechanical properties
AI Read Science
Must-Reading Tree
Example
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
Generate MRT to find the research sequence of this paper
Chat Paper
Summary is being generated by the instructions you defined