Enhanced strength and ductility in an additively manufactured Al10SiMg alloy at cryogenic temperatures
Creators
- 1. UCL, Bartlett Sch Sustainable Construction, London WC1E 6BT, England
- 2. Gazi Univ, Dept Mech Engn, TR-06570 Ankara, Turkiye
- 3. TUBITAK Marmara Res Ctr TUBITAK MAM, Met Mat Technol, TR-41470 Gebze, Turkiye
- 4. Japan Atom Energy Agcy, J PARC Ctr, 2-4 Shirakata, Tokai, Ibaraki 3191195, Japan
Description
The increasing demand for lightweight materials that maintain mechanical integrity at ultralow temperatures has driven the development of advanced alloys for cryogenic applications. Additive manufacturing using laser powder bed fusion (LPBF) offers a scalable approach to producing alloys with tailored properties. Here we show that LPBF-manufactured Al10SiMg alloy exhibits significant increase in ultimate tensile strength (395 MPa) and uniform elongation (25%) at an ultralow temperature of 15 K. The enhanced properties result from grain refinement, increased geometrically necessary dislocations, and stress partitioning between the Al matrix and the stiffer Si phase, which supports strain accommodation during deformation. The in-situ neutron diffraction revealed that the Si phase carries most of the load due to its higher yield strength, while the Al matrix experiences continuous strain hardening, enabling an extended deformation capacity. These findings highlight the potential of Al10SiMg for cryogenic applications such as hydrogen storage systems, aerospace components, and quantum computing hardware.
Files
bib-8326b4c8-b565-4cbf-8012-3734f4c5da7e.txt
Files
(300 Bytes)
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