It was found that the stress-based FLSD differs from the conventional strain-based FLD,and the reasons for the disagreement between them were discussed,the influence of strain hardening index and wall thickness on FLSD was also analyzed.

Based on the state equation that stress is a function of strain and strain-rate, the differential constitutive equation during superplastic tensile deformation is deduced, and then the mechanical meaning of the strain hardening index in the equation is interpreted.

The physical meaning and several determination methods of strain hardening index and thick anisotropy index r are introduced.

For the steel containing high content martensite,strain hardening exponent n and strain hardening rate significantly increase in the stage of uniform deformation with the increase of martensite.

The results showed that the strain hardening exponent,determined by the Crussard-Jaoul analysis,was affected by dislocation density and twin volume fraction,especially,it was increased greatly with twin.

With the indication ball indentation technique ( IBIT),the indentation hardness,young\'s modulus,yield strength,ultimate tensile strength,strain hardening exponent and surface residual stress of the tested joint were simultaneously measured.

Tensile strain hardening behaviours of nitrogen strengthening high manganese austenitic cryogenic steel;

Effect of moisture content on PVA-SHCC fracture energy and strain hardening;

Tensile strain hardening behavior of TRIP/TWIP steel with 18.8%manganese

An autofrettage model considering the material strain-hardening relationship and the Baus-chinger effect was proposed based on the actual tensile-compressive stress-strain curve of material and modified yield criterion.

TiNi alloy is an excellent tribo-material compared to conventional wear-resistant materials, which is closely related to its superelasticity originating from stress-induced matensite transformation, along with rapid strain-hardening, erosion-resistance and fatigue-resistance.

There are some different autofrettage models based on different simplified material strain-hardening behaviors,such as linear strain-hardening model, power strain-hardening model, and the combination of these strain-hardening relationship models.