The Recovery of Elastic Properties at 35 °C in TRIP 700 Steel Following Deformation

Interstitial Solutes and Deformation in Nb and Nb Single Crystals

“…The details of the equipment and methods used for these tests are described in other publications. 7,[18][19][20] The uniaxial tensile tests were conducted at room temperature using standard tensile testing apparatus. 16 Data from different batches of pure Nb for SRF production were examined and tests were conducted on single crystal Nb samples cut from a coarse-grained ingot.…”

“…Two types of dynamic thermomechanical tests were used to measure elastic modulus and anelastic relaxations: (1) sinusoidal loading with continuous variation of temperature and (2) square wave strain relaxation/recovery experiments. [18][19][20] For the sinusoidal tests, the samples were loaded in 3-point bending over a fixed range of strain at a frequency of 1.0 Hz while the temperature was varied continuously at 1.0 °C per minute typically. The strain and temperature limits were varied staying below the yield strength of the material and within the temperature range of the equipment (-150 °C to 600 °C).…”

Strain path′s influence on the elastic behaviour of the TRIP 700 steel

“…TRIP 700 steel behaviour has already been characterised at different temperatures [4], strain rates [5] and triaxiality states [6], focussing on the plastic behaviour, e.g. yield stress and hardening curve.…”

“…Additionally, several authors have stated the non-linear elastic behaviour of some AHSS materials, which implies more complex characterisations as loading-unloading cycles or pre-strained tensile tests [8,9,[15][16][17][18]. From previous works on TRIP 700 steels [5,[19][20][21] it is concluded that the elastic part of the stress-strain curve during unloading is not a straight line but its curvature evolves with plastic strain. Some authors concluded that the decrease of the elastic modulus is due to microplastic strains while others stated that the second order elasticity is responsible for this variation.…”