|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Powder Metallurgy of Light Metals
||Room Temperature Viability of NiMnCoSn as Magnetic Shape Memory Sensory Particle in an SPS Consolidated Al7075 Composite
||Nick Barta, Ibrahim Karaman, Jacob Hochhalter, John Newman
|On-Site Speaker (Planned)
Demand for materials with enhanced resistance to extreme environments requires the development of novel techniques capable of detecting damage while the material is used. When NiTi particles are embedded in aluminum, crack growth causes the particles to emit an acoustic signal. Although promising, this approach can not readily quantify extent of damage. Incorporating a dynamic magnetic response into the shape memory particles that changes with cracking would allow an external sensor to quantify the damage by measuring the length of the crack along the transformed particles. Using powder precursors, bulk specimens were manufactured with Al 7075 and a magnetic shape memory alloy (MSMA) NiMnCoSn via spark plasma sintering to investigate the magnetic change in MSMA particles due to stress from crack interactions. Preliminary results show transformation under magnetic field, reorientation of martensite due to external stress on particles, and low reactivity with the Al 7075 matrix at temperatures below 400°C.
||Planned: EPD Congress Volume