Internal friction and strain aging of ferrous austenite

Theromdynamics of carbon in nickel-based multicomponent solid solutions

“…Previously, Shriver and Wuttig (1972 Ulitchny and Gibala (1973) are thus consistent with our both in terms of temperature dependence and quench rate dependence.…”

Strain aging: Cribb/reed-hill’s model applied to the FeMnAlSiC austenitic system

“…(4) No prediction is made for the phenomenon saturation, This aspect of the curves is not dealt with in this work. The and concentration gradients are not taken into account.…”

“…For the energy, alloying elements, and deformation modes. [4] Since FeMnAlSiC system, considering ϭ 0 and r ϭ b, the alloythe FeMnAl system [5] has a stacking fault energy about 100 lattice parameter of 0.3669 nm, ⍀ , the atomic volume, equal ergs/cm 2 , which is quite similar to that of a 70 to 30 brass to 1.23 ϫ 10 Ϫ29 m 3 ; C 44 equal to the shear modulus of alloy, it follows that c cw v ϭ 5.9 ϫ 10 Ϫ4 . The concentration ␥ -iron, [7] approximately equal to 11.2 ϫ 10 7 kJ/m 3 , we have of carbon-vacancy pairs will be then, if c t c c cv : [2] or u(r) ϭ Ϫ[(0.168 ϫ b)/r](eV) Depending on the value of E cv b , almost all the vacancies are coupled with the carbon atoms.…”

“…tion of vacancies generated by deformation, in a manner Substituting Eqs. [6] and [7] into the preceding expression similar to brass, [4] we use c t v ϭ c cw v ϭ 5.9 ϫ 10 Ϫ4 . and setting u kT, we have The aging tests were carried out for a previous deformation of 0.15, leading to (c t v ϭ 8.85 ϫ 10 Ϫ5 ).…”

“…[11] Making ⌬ ϭ ⌬/m, where only by the interaction with carbon but also, probably, by m is an orientation factor, which relates shear stresses to the presence of other substitutional solutes in this alloy. [4,9,10] axial stresses, with values between 2 and 2.75, we have An estimate of the order of magnitude of E cv b was proposed ⌬ ϭ [(mU o )/(2bR)]…”