2017 Technical Division Student Poster Competition: Materials Processing and Manufacturing Division (MPMD) Undergraduate Students
Sponsored by: TMS Extraction and Processing Division, TMS Functional Materials Division, TMS Light Metals Division, TMS Materials Processing and Manufacturing Division, TMS Structural Materials Division
Program Organizers: TMS Administration
Monday 5:00 PM
February 27, 2017
Room: Hall B1
Location: San Diego Convention Ctr
SPU-10: A Cellular Bioactivity of Sol-Gel Derived Borate Glass-Polycaprolactone Electrospun Scaffolds: William Lepry1; Sophia Smith1; Liliana Liverani2; Aldo Boccaccini2; Showan Nazhat1; 1McGill University; 2University of Erlangen-Nuremberg
Recently, sol-gel derived borate glasses (BGs) have shown unprecedented conversion rates to bone-like mineral (hydroxycarbonated apatite). To explore their potential applications in bone tissue engineering, this study reports on the fabrication and characterization of BG particle incorporated electrospun ε- polycaprolactone (PCL) fibrous composites. The electrospinning technique successfully incorporated PCL fibres with BG particles at 2.5 and 5 w/v%, with the higher BG loading creating a three-dimensional cotton-wool like morphology. Dynamic vapour sorption showed greater extents of mass change with BG content attributable to water sorption, and indicating greater reactivity in the composite systems. In vitro bioactivity was investigated in simulated body fluid for up to 7 days. Scanning electron microscopy, Fourier-transform infrared spectroscopy and x- ray diffraction indicated apatite formation in the 5 w/v% incorporated composite scaffold. In summary, sol-gel derived BGs incorporated- fibrous electrospun PCL composites indicate rapid reactivity and bioactivity with potential applications in mineralized tissue engineering.
SPU-11: Development of Bimodal Ferrite Grain Distribution to Enhance the Ductility of Dual Phase 600 (DP 600) Steel: Jisha Krishnan1; Monideepa Mukherjee2; Anish Karmakar1; Shiv Brat Singh1; 1Indian Institute of Technology Kharagpur; 2Tata Steel
Grain refinement is a promising method to achieve better strength without compromising ductility. Ultra-fine ferrite grains (<2 μm), even without addition of expensive alloying elements, show high strength and toughness. But it suffers from poor work-hardening due to weak dislocation activity. Incorporation of coarse-grains with higher dislocation mobility helps in improving ductility. This work reports development of Dual Phase 600 steel with ultrafine martensitic islands distributed within bimodal ferritic grains. The experiment seeks to corroborate the effect of initial microstructure, extent of deformation and inter-critical annealing time on the development of microstructure. A combination of air cooling followed by 80% deformation and 60Sec annealing resulted 642 UTS with 27% elongation. The microstructure consists of 13 volume% martensite (banding is seen) distributed in bi-modal ferrite matrix. 2% of the large ferrite grains (~20μm) are covering 30% area of the microstructure, embedded in a matrix of fine grain (~2 μm) ferrites.
SPU-12: Use of Carbon Fiber Laminates for the Manufacture of Leg Prosthetics: Javier Pascasio Chávez1; Benjamín González Vizcarra1; Miriam Siqueiros Hernández1; 1Universidad Autónoma de Baja California
This research is associated with the manufacture of a transtibial prosthesis using carbon fiber laminates. During the current phase of the project the work is oriented towards reviewing scientific articles, bibliographical content and diverse sources related to the use of composite materials for prosthetic design and manufacturing. Composite materials currently show great potential for the development of leg prosthetics with intelligent designs and better applications for a wider range of activities. When it comes to the building process, the specific characteristics, mechanical properties and measurements have to maintain small tolerances, this makes the whole process complicated and implies the need for accurate characterizations. Through the broad structural analysis and material characterization the correct specifications for the laminate manufacturing method can be selected. Using this specifications carbon fiber laminates have been manufactured and contribute with further insight of the manufacturing process for laminates and the material characterization.