The structure–property relationship was studied in an Fe-18Mn-0.6C-1.5Al steel subjected to cold rolling various total reductions from 20% 80% and subsequent annealing for 30 min at temperatures of 673 973 K. resulted significant strengthening the steel. hardness increased 1900 almost 6000 MPa after reduction 80%. Recovery worked microstructure developed during 773 K, resulting slight softening, which did not exceed 0.2. On other hand, static recrystallization readily rolled samples with...

The influence of thermo-mechanical treatment consisting cold rolling followed by recrystallization annealing on the grain size and mechanical properties a high-Mn TWIP steel was studied. An Fe-23Mn-0.3C-1.5Al (wt. %) subjected to extensive with reduction 80% (true strain ∼1.6) then annealed in temperature interval ranging from 400 900 °C during 20 minutes. Recovery processes took place below 500 °C, partial evident at ~550°C fully recrystallized structure evolved after 600 higher. static...

Modeling the effect of deformation on mechanical properties a Fe-23Mn-0.3C- 1.5Al (in wt. %) TWIP steel subjected to extensive cold rolling was performed. The approach including Hall-Petch relation and dislocation strengthening used for determination strength increment with deformation. Distance between twin boundaries considered be mean free path glide in relationship. rate accumulation TWIP-steel calculated via X-ray diffraction (XRD) measurements compared direct transmission electron...

Effect of cold rolling on the microstructure and mechanical properties a Fe-23Mn-0.3C-1.5Al (in wt. %) TWIP steel with an initial grain size 24 μm was studied. Extensive deformation twinning occurred upon reduction by rolling. The volume fraction twins attained about 0.2 at 20%. Then, intensity gradually decreased increasing total reduction. average twin thickness 20 nm remained unchanged, although distance between progressively reduced strain. banding observed after 60%. microshear bands...

The influence of cold biaxial forging and annealing on the microstructure evolution mechanical properties Fe-18Mn-0.6C-0.1NTWIP steel was investigated.The after thermomechanical treatment examined by means scanning electron microscopy (SEM) with back-scatter diffraction (EBSD) analyzer transmission (TEM).The containing a high density deformation twins evolved forging.Then, recovered or partially recrystallized during subsequent for 1 h at 673 873 K, respectively.The followed partial...

A physically based model is applied to evaluate the tensile behavior of high-Mn TWIP steel. Tensile tests are interrupted after 20, 40, 60, and 80% deformation kernel average misorientation method used estimate dislocation density in each condition. It found that evolution can be described by exponential law, but cannot only strengthening. reduction mean free path due formation mechanical twins considered as strengthening contribution. The curve include three terms: friction stress,...

The grain refinement is an effective approach to strengthen high-Mn TWIP/TRIP steels. development of recrystallized microstructure with a size about one micron increases the yield strength steels above 500 MPa. fine grained microstructures can be easily developed by cold rolling followed primary recrystallization. expressed power law function strain hardening during previous exponent -2. Taking dislocation density as main strengthener, inverse proportion density. Then, number grains evolved 2.