Dynamic recrystallisation (DRX) is an important aspect for industrial applications in hot metal working. Although DRX has been known for more than thirty years, its mechanisms have never been precisely investigated, in part because it was not readily possible to make local texture measurements. In the present work, the material behaviour during DRX is investigated and modelled based on the micr...

the present article considers the nd:yag pulsed laser welding of 304 stainless steels with two different compositions. the effects of various laser operational parameters and cooling rates on the weld microstructures were considered. the results show that ferritic solidification is produced in the stainless steel with the creq/nieq ratio of 1.7, and austenitic solidification is produced in the ...

We have developed a method for forming carbon nanotubes (CNTs) directly on the surfaces of stainless steel materials that are important industrially. Using plasma-assisted chemical vapor deposition (PCVD), CNTs are formed at comparatively low temperatures, thus avoiding excessive annealing and degradation of the stainless steel. Because the catalytic metals needed for CNT formation are containe...

In this paper, a strain-intensity-factor-based method is proposed to calculate the fatigue crack growth under the fully reversed loading condition. A theoretical analysis is conducted in detail to demonstrate that the strain intensity factor is likely to be a better driving parameter correlated with the fatigue crack growth rate than the stress intensity factor (SIF), especially for some metall...

The anisotropic, heterogeneous and coarse granular structures of austenitic stainless steel welds may lead to important disturbances of the ultrasonic propagation : beam skewing and splitting, attenuation, backscattering and spurious echoes. Numerous studies were undertaken by EDF R&D and CEA for a few years to study these disturbances and to improve the ultrasonic NDT in nuclear applications. ...

The dynamic behavior of three high manganese steels with very different stacking faultenergy (SFE) values (4-30 mJ/m2) were studied using high strain rate torsional tests. The hotrolledmicrostructure of the steel with the lowest SFE of 4 mJ/m2 consisted of a duplex mixture ofaustenite and ε-martensite, but those of the other two steels were fully austenitic. The deformedmicrostructures were stu...