Metastable austenitic steels react to plastic deformation with a thermally and/or mechanically induced martensitic phase transformation. The transformation ?’-martensite can take place directly or indirectly via the intermediate stage of ?-martensite from single-phase austenite. This effect is influenced by stacking fault energy (SFE) steels. An SFE < 20 mJ/m2 known promote indirect conversi...

In the present study, the effects of the boriding process on adhesion and tribological properties of AISI 310 steel were investigated. Boriding was performed in a solid medium consisting of Ekabor-II powders at 1123 and 1323K for 2 and 6 h. The boride layer was characterized by optical microscopy, the X-ray diffraction technique and the micro-Vickers hardness tester. The X-ray diffraction analy...

Austenitic stainless steels are extensively used in various applications requiring good corrosion resistance and formability. In the current study, the formation of nano/ ultrafine grained austenitic microstructure in a microalloyed AISI 304L stainless steel was investigated by the advanced thermomechanical process of reversion of strain-induced martensite. For this purpose, samples were subjec...

in the present study, the effect of grain size on the austenite stability was studied by nanoindentationtests in a 304l stainless steel. thermomechanical processing based on cold rolling and annealing wasused to produce two different types of austenite: ultrafine grained (ufg) austenite with the averagegrain size of 0.65 μm and coarse grained (cg) austenite with the average grain size of 12 μm....

The mandrel plays a vital role in metal tube bending limit improvement and high-quality achievement. For the forming process of tubes with different diameters, corresponding needs to be customized, which has disadvantages long design cycle, high manufacturing cost, low reuse rate. Therefore, novelty concept diameter adjustable (DAM) based on multi-point contact was proposed adapt processes. Sin...