Monsieur Pineau, as I remember him
I am deeply saddened by the passing of Andre Pineau in Paris yesterday. I happened to be one of ~100 PhD students he graduated over the course of his career.
twinning
PhD Position, Crystal Plasticity / X-ray Diffraction, The University of Alabama
The Advanced Computational Materials Engineering Laboratory (ACME Lab: https://acmelab.ua.edu) in the Department of Mechanical Engineering at The University of Alabama is seeking candidates for a fully-funded PhD position in the area of deformation mechanics to begin August 2022.
Nano-twinning in a γ′ precipitate strengthened Ni-based superalloy
Dear Colleagues,
Please see attached a recent article published in Materials Research Letters. In this article, we identified a new twinning pathway in a γ′ precipitate strengthened Ni-based superalloy by high-resolution transmission electron microscopy, and demonstrated, via atomistic simulations, that Co in the γ′ precipitates promotes the new twinning pathway featured with nucleation of one complex stacking fault (CSF) on the middle plane between two separated CSFs.
Best,
Yizhe
A Dynamic Phase-field Model for Structural Transformations and Twinning: Regularized Interfaces with Transparent Prescription of Complex Kinetics and Nucleation. Part I & Part II
Vaibhav Agrawal, Kaushik Dayal, Carnegie Mellon University
doi: http://dx.doi.org/10.1016/j.jmps.2015.04.010 (part I)
doi: http://dx.doi.org/10.1016/j.jmps.2015.05.001 (part II)
Evading the strength-ductility trade-off dilemma in steel through gradient hierarchical nanotwins
It is a long-standing goal in metallurgy to enhance the strength of materials without sacrificing ductility. In a recent article in Nature Communications, we reported an effective way to evade the strength-ductility trade-off dilemma in twin-induced plasticity steel.
Reversible cyclic deformation mechanism of gold nanowires by twinning–detwinning transition evidenced from in situ TEM
Reversible deformation of metal nanowires accommodating large strains by twinning-detwinning
A Surface Stacking Fault Energy Approach to Predicting Defect Nucleation in Surface-Dominated Nanostructures
Recently accepted for publication in JMPS:
http://www.sciencedirect.com/science/article/pii/S0022509613000884
Post-Doc in Grenoble, France: Atomic-scale twinning in HCP metals
A postdoctoral position is available in the material science laboratory (SIMAP) of INP Grenoble, France, in David Rodney’s group in collaboration with Laurent Capolungo from Georgia Tech Lorraine, with primary focus on the atomic-scale study of twinning in HCP metals. We are looking for a strongly motivated candidate to apply saddle-point search methods, including the Nudged Elastic Band method and the Activation Relaxation Technique, to study the nucleation and propagation of primary and secondary twins during the plastic deformation of HCP metals.
Fracture of Sub-20nm Ultrathin Gold Nanowires
Adv. Funct. Mater. DOI: 10.1002/adfm.201101224