• The ultimate goal of this work is to: 1) fabricate inexpensive MMSMAs in polycrystalline bulk form having large magnetic field‐induced actuation work output and significantly enhanced ductility using a powder metallurgy (PM) approach, and 2) fabricate open porous MMSMAs for the evaluation of their biological viability and potential as remotely controlled MMSMA morphing tissue scaffolds for in‐vitro osteogenesis. • The intellectual merits of this transformative research are: – The potential to create an entirely new family of tissue scaffolds, i.e. meta‐magnetic tissue scaffolds, from open porous MMSMAs that would allow far-field actuation for tissue growth in‐vitro & in‐vivo. – The potential to revolutionize the field of SMAs and actuator materials by fertilizing completely new property landscapes and theories on magneto-thermo-mechanical coupling – Improved MMSMA ductility and fracture toughness through unique processing techniques thereby making MMSMAs cheaper and more accessible for a multitude of applications. • Research Highlights: – Demonstrated for the first time that a porous polycrystalline meta-magnetic SMA can be created through pressureless sintering. It allowed the first polycrystalline MMSMAs (NiMnCoSn and NiMnCoAl) exhibiting a superelasticity and meta-magnetic shape memory. – Developed an effective processing route that eliminates all oxygen contamination that is detrimental to the material’s magneto-thermo-mechanical energy coupling. – Successful fabrication of 50% porous NiMnCoSn MMSMAs showing magnetic-field induced martensitic transformation – Demonstration of stable cyclic mechanical response, magnetic field induced transformation, and meta-magnetic shape memory effect in sintered NiCoMnSn powders with small pores. – Conducted systematic parametric study varying temperature, Thermo-Mechanical tests on 50 vol% NiCoMnSn foams showing an increase in fracture strength and less damage (right) compared to a material with a lower strut density (left). Materials World Network: U.S.-Japan Research Collaboration in Meta-Magnetic Shape Memory Alloys (MMSMAs) with Enhanced Ductility and Controlled Porosity Ibrahim Karaman, Texas Engineering Experiment Station, DMR 0909170 20 μm a 20 μm 1000 μm -4 -3 -2 -1 0 Strain [% ] 150 100 50 0 -50 Tem perature [ºC ] Fracture D am age 2.5 M Pa 5 M Pa Ni 43 Co 7 Mn 39 Sn 11 Pressed at200M Pa 1050ºC 24 hr Micro CT image (left) showing interconnected pore structure. X- Ray maps (right) showing that oxygen contamination from space holder and binder materials (top right) can be removed (bottom right) by selecting a specific processing route. -4 -3 -2 -1 0 Strain [% ] 150 100 50 0 -50 Tem perature [ºC ] D am age Fracture 5 M Pa 10 M Pa Ni 43 Co 7 Mn 39 Sn 11 Pressed at800M Pa 1050ºC 12 hr 20 M Pa