Developing lighter, stronger and more ductile aerospace metallic materials is in demand for energy efficiency strategies. Alloys with twinning-induced plasticity (TWIP) and/or transformation-induced (TRIP) effects have been exploited to defeat the conflict of strength versus ductility, yet very few if any physically informed methods exist address complex interactions between transitions. Here w...

A new β-metastable Ti-alloy is designed with the aim to obtain a TWIP alloy but positioned at limit between TRIP/TWIP and dominated regime. The exhibits large ductility combined an elevated stable work-hardening rate. Deformation occurring by formation multiplication of {332}<113> twins evidenced followed in-situ electron microscopy, no primary stress induced martensite observed. Since microstr...

The hot ductility of Transformation Induced Plasticity (TRIP) and Twinning (TWIP) steels is reviewed, concentrating on the likelihood cracking occurring continuous casting during straightening operation. In this review, influence high levels Al, Si, P, Mn C their will be discussed as well important role B can play in improving ductility. Of these elements, Al has worst but a addition often need...

As expected from the alloy design procedure, combined Twinning Induced Plasticity (TWIP) and Transformation Induced Plasticity (TRIP) effects are activated in a metastable β Ti-12(wt.%)Mo alloy. In-situ Synchrotron X-ray diffraction (XRD), electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) observations were carried out to investigate the deformation mechanisms an...

In recent years, great attention has been paid to the development of high manganese austenitic TWIP steels exhibiting high tensile strength and exceptional total elongation. Due to low stacking fault energy (SFE), cross slip becomes more difficult in these steels and mechanical twinning is then the favored deformation mode besides dislocation gliding. Chemical composition along with processing ...