There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

J. Appl. Cryst.の発刊に際して

https://zenodo.org/record/1258680/files/article.pdf

The influences of temperature and microstructure on the tensile properties of a CoCrFeMnNi high-entropy alloy

Dynamic and post-dynamic recrystallization under hot, cold and severe plastic deformation conditions

The mechanism of metadynamic softening in austenite after complete dynamic recrystallization

The austenite microstructure evolution and softening processes have been studied in a 23Cr–6Ni–3Mo duplex stainless steel, comprising equal fractions of austenite and ferrite, deformed in uniaxial ...

The austenite microstructure evolution in a duplex stainless steel subjected to hot deformation

The five-parameter grain boundary curvature distribution in an austenitic and ferritic steel

A C-Mn-Nb-Ti steel was deformed by hot torsion to study ultrafine ferrite formation through dynamic strain-induced transformation (DSIT) in conjunction with air cooling. A systematic study was carried out first to evaluate the effect of deformation temperature and prior austenite grain size on the critical strain for ultrafine ferrite formation (e
 C,UFF) through single-pass deformation. Then, multiple deformations in the nonrecrystallization region were used to study the effect of thermomechanical parameters (i.e., strain, deformation temperature, etc.) on e
 C,UFF. The multiple deformations in the nonrecrystallization region significantly reduced e
 C,UFF, although the total equivalent strain for a given thermomechanical condition was higher than that required in single-pass deformation. The current study on a Ni-30Fe austenitic model alloy revealed that laminar microband structures were the key intragranular defects in the austenite for nucleation of ferrite during the hot torsion test. The microbands were refined and overall misorientation angle distribution increased with a decrease in the deformation temperature for a given thermomechanical processing condition. For nonisothermal multipass deformation, there was some contribution to the formation of high-angle microband boundaries from strains at higher temperature, although the strains were not completely additive.

Hossein Beladi

Papers

The mechanism of metadynamic softening in austenite after complete dynamic recrystallization

The austenite microstructure evolution in a duplex stainless steel subjected to hot deformation

The five-parameter grain boundary curvature distribution in an austenitic and ferritic steel

The Effect of Multiple Deformations on the Formation of Ultrafine Grained Steels

The effect of strain on interphase precipitation characteristics in a Ti-Mo steel