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Microstructure in work-hardened micro-truss materials given post-forming annealing treatments

Brandon Bouwhuis ; Uta Klement (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; Glenn Hibbard
Proceedings of 2010 TMS Annual Meeting Vol. CD (2010),
[Konferensbidrag, refereegranskat]

Micro-truss cellular materials can be used as structurally efficient cores in light-weight sandwich panels. These sandwich cores have been produced using deformation-forming approaches, which introduce plastic strain into the truss struts. While this imparted strain can be used to strengthen the overall micro-truss core, it also drives recrystallization and grain growth if sandwich panel assembly involves conventional brazing treatments that subject the truss core to elevated temperatures. In addition to losing a potential strengthening mechanism, brazing can also result in the grain size of the annealed microstructure approaching the cross-sectional dimensions of the micro-truss struts. The present study is an examination of the strut microstructures in aluminum alloy and stainless steel micro-truss materials fabricated using a deformation-forming approach, and following a post-fabrication annealing step. These results serve as a guideline for future sandwich panel thermal processing to minimize the reduction of strength due to annealing and detrimental size effects.

Nyckelord: cellular material, micro truss structure, annealing, EBSD, Al, stainless steel, work hardening

Denna post skapades 2010-03-10. Senast ändrad 2014-09-02.
CPL Pubid: 117640


Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik



Chalmers infrastruktur