Francesca Fabe, a junior at Beaumont High School, collaborated with PhD student, Janet Gbur on her AP Biology project investigating the fatigue of dental arch wires. The project, “Beta Titanium vs. Nitinol Archwires: Which material can withstand longer periods of fatigue before failing?” has been accepted into the NEOSF, BEST Medicine, and District V science fairs.


Mohsen Seifi, Doctoral Researcher is the recipient of the 2014 ASM International Cleveland Chapter President’s Award. The Cleveland Chapter President’s Award is presented annually ‘to the one person the Chapter Chairman feels contributed the most for the good of the Chapter in promoting the goals and objectives of ASM International’. The Chapter Chairman selects the recipient. Mohsen accepted his award at the May 2014 ASM International Cleveland Meeting held at ASM International HQ. The details of this award can be found on the ASM Cleveland Website here.

Jun Yi, Wei-Hua Wang and Prof. Lewandowski published at paper in Acta Materialia (2015) 87, pp. 1-7, entitled: Sample size and preparation effects on the tensile ductility of Pd-based metallic glass nanowires. 

Abstract—Glass materials, including metallic glasses (MGs), typically fracture in tension at room temperature in a globally elastic manner. Although homogeneous tensile plasticity and necking of nanoscale MGs have been reported, controversy exists regarding possible contributions from specimen preparation and testing techniques. Here, we show the separate effects of sample size reduction and extrinsic effects on the homogeneous tensile plas- ticity and necking of Pd40Cu30Ni10P20 glassy wires tested at room temperature. An intrinsic transition from catastrophic shear fracture to plasticity and necking was obtained in this glass when its diameter approached the estimated length scale of the shear-band nucleus size (i.e. 500 nm). A further reduction in the wire diameter to 267 nm produced homogeneous flow and complete ductile necking, with a true fracture strain in excess of 2.0. Our theoretical analysis shows that the plasticity of nanoscale MG wires with diameters smaller than a critical length scale is mediated by shear trans- formations catalyzed by local shear dilatation, and the predicted critical length scale for the brittle-to-ductile transition of the glassy wires is con- sistent with our experimental results. Extrinsic effects introduced during sample preparation and/or testing produce entirely different results and are reviewed in the light of previous work.

The published paper can be accessed here.

Mohsen and Matt Dahar, doctoral researchers in the AMMRC at CWRU with Professor Lewandowski, attended the ASM Educational Symposium on Additive Manufacturing which was held at OAI on May 12, 2014. Various talks were delivered while local and national companies demonstrated their products. This symposium was the Chapter’s annual education event and provides Chapter members and other interested parties the opportunity to improve their knowledge and network on topics of current interest.