The quantitative characterization of the microstructure evolution in high-Mn steel during deformation is of great importance to understanding its strain-hardening behavior. In the current study, in situ high-energy synchrotron X-ray diffraction was employed to characterize the microstructure evolution in a Fe-17Mn-1.5Al-0.3C steel during a tensile test. The microstructure at different engineeri...

The study focuses on the superelastic effect in single-crystalline boron-doped Fe-based shape memory alloys. homogenized and quenched single crystals were subjected to a heat treatment at 973 K for variable aging times. As result, small coherent nanometer-sized γ′ (Ni 3 Al-type) precipitates formed. It was established that Fe-28Ni-17Co-11.5Al-2.5Ta-0.05B oriented along [001] direction exhibit f...

A 3D elastoplastic phase-field model is used to study the effect of isochronal heating on martensitic transformation in stainless steel quenched cryogenic temperature. The results show that slower heating, larger martensite volume fraction developed heating. simulated microstructures driven by autocatalysis during early stages and coarsening existing units later transformation. internal stresse...

A new type of high chromium cast iron (HCCI) was prepared, and its microstructure, mechanical properties, abrasion resistance were investigated systematically. Results showed that after surface carburizing chromizing, the microstructure HCCI mainly consists martensite, boride (M2B), carbide (M7C3), accompanied with a large amount secondary precipitations M23C6. Moreover, morphology hardness in ...

In the present research mixed convection flow through a copper-water nanofluid in a driven cavity in the presence of magnetic field is investigated numerically. The cavity is heated from top and cooled from bottom while its two vertical walls are insulated. The governing equations including continuity, N-S and energy equations are solved over a staggered grid system. The study is conducted for ...

The problem of steady Magnetohydrodynamic boundary layer flow of an electrically conducting nanofluid due to an exponentially permeable stretching sheet with heat source/sink in presence of thermal radiation is numerically investigated. The effect of transverse Brownian motion and thermophoresis on heat transfer and nano particle volume fraction considered. The governing partial differential eq...

In situ neutron diffraction experiment was used during tensile testing at room temperature to examine the changes on the percentage and texture of both ferrite and austenite in a nanocrystalline bainitic steels transformed at two different temperatures 200°C and 300oC for different times to achieve the same phase percentages. Both samples showed an inadequate capability of austenite to transfor...

currently available non-invasive clinical methods for diagnosing osteoporosis are mainly associated with ionizing radiation. ultrasonic assessment of bone disease is a more recent technology. a theoretical explanation for the relationship between ultrasonic parameters and bone structure is necessary. thus, two types of bone samples of perspex (hap) and perspex-glass beads were produced. each ty...

in this paper, the problem of turbulent forced convection flow of water- alumina nanofluid in a uniformly heated pipe has been thoroughly investigated. in numerical study, single and two-phase models have been used. in single-phase modeling of nanofluid, thermal and flow properties of nanofluid have been considered to be dependent on temperature and volume fraction. effects of volume fraction a...