The phenomenon of paternally dependent familial twinning has been known in human and animal genetics since the 1920s, but still remains without any theoretical explanation and is indeed a neglected field of inquiry. Over the last two decades investigations in reproduction biology have discovered the significant role of multiple paternally dependent errors in fertilization including androgenic t...

Twinning rates in developed countries have recently registered an increase. At the end of the 1970s, the change in mother's age structure has partially contributed to the growth in the proportion of multiple births. In fact, the evolution of twinning rates is related to the calendar of maternity since, comparatively to younger mothers, older women more frequently have twins. Moreover, the growi...

Abstract Effects of reduced (– 40 °C), ambient (20 and elevated (200 °C) deformation temperatures on the microstructure evolution strain hardening behavior two low-C thermomechanically processed high-manganese steels were studied. The was characterized by means scanning electron microscopy (SEM), backscatter diffraction (EBSD), transmission (TEM) techniques. temperature-dependent tendency auste...

This work investigates the impact of vacuum sintering and microstructure-mechanical properties relationship in binder jet additive manufacturing 316 L. These two perspectives provide valuable understanding to an otherwise well-established area. The resulting are compared with those conventionally manufactured parts. Results revealed isotropic microstructural mechanical jet-manufactured samples....

The dynamic tensile behavior of the twinning-induced plasticity (TWIP) steel with vanadium carbide is investigated at different strain rates 10−4, 10−3, 10−2 and 0.05 s−1. Microstructure characterization, carried out using back scatter electron diffraction (EBSD) transmission microscopy (TEM), shows a homogeneous face center cubic structured matrix uniformly dispersed carbide. controlled by agi...

Push-pull tests at fixed plastic strain amplitude or stress were run on a TWIP steel, and followed by TEM observations, to analyze its cyclic behavior in relation with the deformation mechanisms. The kinematic isotropic components of flow measured throughout whole hardening/softening stages, their evolution cumulated was compared those tension. rise internal found responsible for initial harden...

The flow stress of Hadfield steel is attributed to lattice friction, dynamic strain aging (DSA), mechanical twinning, and forest hardening. However, it has not been clarified yet which mechanism quantitatively contributes most the work Here, an austenitic containing 1.1 wt.% C 12.5 Mn was studied, tensile tests at a rate 1 s−1 were performed neglect DSA effect. friction estimated by Hall–Petch ...

The purpose of this study was to investigate the effect of maternal inbreeding on incidence of twinning,dystocia and stillbirth in Holstein cows of Iran. Calving records from March 2000 to April 2009 comprisingof 365,021 calvings on 153,802 cows from 86 dairy herds were used. The mean level of inbreeding was0.7%, less than 37% of all animals were inbred, and a small proportion (3.45%) of inbree...