The causes of temporal variation in the twinning rate are not always clear. As a consequence, the study of this variation has attracted the attention of several authors who were also interested in the correlation between twinning rate and human fertility. Prematurity, low birth weight, increased risk of infant death and long-term risk for morbidity associated with multiple gestations have been ...

The five-parameter grain boundary analysis has been applied for the first time to a titanium alloy. The boundary distribution was related to the b-to-a phase transformation and to deformation twinning. There was a very strong planes texture, only partially related to twinning, which did not diminish during long-duration, low-temperature annealing. 2007 Acta Materialia Inc. Published by Elsevier...

We develop an analytical expression for twin nucleation stress in bcc metal and alloys considering generalized planar fault energy and the dislocations bounding the twin nucleus. We minimize the total energy to predict the twinning stress relying only on parameters that are obtained through atomistic calculations, thus excluding the need for any empirical constants. We validate the present appr...

The reported data describe the crystallization, crystal packing, structure determination and twinning of the unliganded Fab (antigen-binding fragment) from the NISTmAb (standard reference material 8671). The raw atomic coordinates are available as Protein Data Bank structure 5K8A and biological aspects are described in the article, (Karageorgos et al., 2017) [1]. Crystal data show that the pack...

Ni-Mn-Ga is a ferromagnetic shape memory alloy that deforms by twin boundary motion. The magneto-mechanical properties depend strongly on the twin microstructure. A thermomechanical treatment was applied to a Ni-Mn-Ga single crystal with coexisting 10M and 14M martensite structures to create twin boundaries and align the short crystallographic c direction preferentially perpendicular to the sur...

In a recent paper published in Proceedings of the Royal Society B, Robson & Smith (RS) presented an analysis of a database comprising the life histories of more than 50 000 women born in the nineteenth century UT, USA. They addressed the question of whether a woman's likelihood of producing twins is related to overall phenotypic 'quality' [1]. Controlling for a number of confounding factors, th...

The standard molecular replacement (MR) protocol involves one-by-one search for molecules composing the asymmetric unit, therefore the non-crystallographic symmetry (NCS) complicates the structure determination. However, the conservation of the oligomeric state in a series of homologues and the use of information about the NCS in the target crystal may help to solve difficult MR problems. A num...

Deformation twinning was thought as impossible in ionic compounds with rock-salt structure due to the charge effect on {111} planes. Here we report the presence and formation mechanism of deformation {111} twins in the rock-salt manganese sulphide (MnS) inclusions embedded in a hot-rolled stainless steel. Based on the atomic-scale mapping under aberration-corrected scanning transmission electro...