Concept
Conjoined twins
Related publications (21)
EBSD study of variant reorientation, texture, and twin formation in a martensitic NiTi alloy deformed in compression
Roland Logé, Cyril Cayron, Mathijs Pieter van der Meer, Junfeng Xiao
Martensitic crystallography plays a vital role in the texture evolution and mechanical properties in Nickel-Titanium (NiTi) shape memory alloys when subjected to deformation. However, their microstructural changes during deformation are not well known and ...
Oxford2023The concept of axial weak twins
It is generally assumed that the parent-twin interface is a fully invariant plane. The calculations of the rational interfaces of the type I twins and irrational interfaces of the type II twins are based on this hypothesis. Recently, some asymmetric facets ...
PERGAMON-ELSEVIER SCIENCE LTD2022Complements to Mugge and Friedel's Theory of Twinning
The crystallography of twinning is based on the concepts of simple shear and obliquity introduced by Mugge, Mallard and Friedel at the turn of the last century, with tensor mathematics later developed by Bilby, Bevis and Crocker in the 1960s. We propose a ...
2020Diffraction artefacts from twins and stacking faults, and the mirage of hexagonal, polytypes or other superstructures
Recently, a hexagonal phase has been reported in high carbon steels in several studies. Here, we show that the electron microscopy results used in these studies were erroneously interpreted. The extra-spots in the diffraction patterns and the odd contrasts ...
2020The mechanics of crack-tip dislocation emission and twinning
Dislocation emission from a crack tip is a necessary mechanism for crack tip blunting and toughening. A material is intrinsically ductile under Mode I loading when the critical stress intensity for dislocation emission is lower than the critical s ...
EPFL2019A one-step mechanism for new twinning modes in magnesium and titanium alloys modelled by the obliquity correction of a (58 degrees, a+2b) prototype stretch twin
The {11-22} and {11-26} twinning modes were recently discovered by Ostapovets et al. [Philos. Mag. (2017), 97, 1088-1101] and interpreted as {10-12}-{10-12} double twins formed by the simultaneous action of two twinning shears. Another interpretation is pr ...
Int Union Crystallography2018Fighting preterm birth with novel surgical tools and biomaterials engineering
With advances in fetal diagnosis and therapy, fetoscopy has become a good option to treat a series of life threatening diseases like twin-to-twin transfusion syndrome or severe congenital diaphragmatic hernia. The efficacy of fetoscopy for those types of d ...
EPFL2017Embrittlement induced by the synergistic effects of radiation damage and helium in structural steels
Ferritic/martensitic steels are candidate materials for fusion reactor structural components, liquid metal containers of spallation neutron sources, and accelerator driven systems, with good radiation resistance and thermo-mechanical properties. However, e ...
EPFL2015Microstructure and precipitates in annealed Co38Ni33Al29 ferromagnetic shape memory alloy
Transmission electron microscopy was performed to investigate the microstructure and precipitates in the annealed Co38Ni33Al29 ferromagnetic shape memory alloy. Apart from the dendritic secondary phase in the austenite matrix, micron-sized (up to 100 μm) f ...
Elsevier Science Sa2013