The Influence of [110] Compressive Stress on Kinetically Arrested B2-R Transformation in Single-Crystalline Ti-44Ni-6Fe and Ti-42Ni-8Fe Shape-Memory Alloys.

Ti-(50-)Ni-Fe alloys exhibit a thermally induced B2-R martensitic transformation (MT) when is between 1.5% and 5.7%, whereas this transformation is suppressed when is 6 at% and higher.

X-ray free electron laser observation of ultrafast lattice behaviour under femtosecond laser-driven shock compression in iron.

Over the past century, understanding the nature of shock compression of condensed matter has been a major topic. About 20 years ago, a femtosecond laser emerged as a new shock-driver. Unlike conventional shock waves, a femtosecond laser-driven shock wave creates unique microstructures in materials.

Extra copy of the mitochondrial cytochrome-c peroxidase gene confers a pyruvate-underproducing characteristic of sake yeast through respiratory metabolism.

The mechanism of pyruvate-underproduction of aneuploid sake yeast was investigated in this study. In our previous report, we revealed that an increase in chromosome XI decreases pyruvate productivity of sake yeast. In this report, we found that increased copy number of CCP1, which is located on chromosome XI and encodes cytochrome-c peroxidase, decreased the pyruvate productivity of sake yeasts.

Stress-induced reverse martensitic transformation in a Ti-51Ni (at%) alloy aged under uniaxial stress.

Ti-51Ni (at%) alloys including coherent precipitates of TiNi exhibits thermally-induced B2-R transformation. If the TiNi is formed under tensile stress, it orientates preferentially so that its habit plane becomes perpendicular to the tensile axis. In such specimens, stress-induced reverse R-B2 transformation is reported to occur.

Unique magnetostriction of FePd attributable to twinning.

FePd exhibits an anomalously large magnetostriction of ~400 ppm at room temperature as well as linear, isotropic, and hysteresis free magnetization behavior. This near perfectly reversible magnetic response is attributable to the presence of a large number of premartensitic magnetoelastic twin clusters present in the system made possible through the elastic softening that occurs near a martensitic transformation temperature of 252 K. It is proposed that the twin clusters in the material reduce both internal elastic and magnetic energy, causing the elastic and magnetic behavior of the material to be intimately linked.