Crack resistance of 15Kh2NMFA steel in the ?196 to 500 �C temperature range determined from the results of testing samples cut from pressure vessel shells

Brittle-to-ductile transition in steels and the critical transition temperature

“…5. Here also the data is shown obtained earlier [17] in compact tension tests on 24 mm thick specimens of the same steel, which together with other specimens were cut from the same billet.…”

Temperature dependence of cracking resistance of 15KhSND steel and special features of its fracture. Report 2

“…For the values ~r ~ 0.5-1.5, the value of o(e r) differs only slightly from ~o.2. *The literature reports note the unsatisfactory comparability and a large scatter of the parameters of the shear lips and also the dominant role of local surface conditions in their formation [5]. The values of ~zz (Fig.…”

“…The mean residual strain in the surface layers of the specimen is associated with the parameters of the plastic wake zone by the following relationship I 1 (5) or for small values of h/d…”

“…In the first case, the dependence of K c on the thickness of the specimen is usually linked with the variation of strain constraint with varying thickness and at constant strain rate, whereas in the second case it is evident that the change of the strain rate becomes important. *Estimate of the value of Ozz on the basis of the distribution of elastic stresses gives for the central part of the specimen ~zz --0.5~yy [5,7] or for the boundaries of the zone in which plastic strains can develop ~zz --0.5~@.~.…”