Maximizing Specific Synergy in Titanium Alloy Heterostructures: An Ashby-Guided Design Blueprint for Direct Laser Deposition

Heterostructured titanium alloys, as demonstrated in recent direct laser deposition (DLD) studies, offer exceptional strength-ductility synergy but lack systematic selection frameworks for application-specific design. This work applies Ashby's methodology to the data from experimental works, mapping the multidimensional property space of TC۴/TC۴+۲.۵Ni layered hybrids and identifying unoccupied "holes" in strength-ductility-density charts. A novel performance index, was derived to maximize specific synergy, with effective properties computed via adapted micromechanics and verified against the source data. Python-based numerical optimization reveals an ideal volume fraction of ۰.۳۵ for the TC۴+۲.۵Ni phase, yielding -۸.۵% improvement in the index compared to monolithic TC۴. This analysis provides design guidelines for aerospace components, highlighting the potential of Ashby's approach for data-driven hybrid material innovation without new experimentation.

کلیدواژه ها:

Ashby's methodology ، heterostructured materials ، titanium alloys ، strength-ductility synergy ، materials selection ، Python optimization