Dislocation structures in 16MND5 pressure vessel steel strained in uniaxial tension

Dislocation structures in 16MND5 pressure vessel steel strained in uniaxial tension at different temperatures from −196°C up to 25°C

“…As a result, most of the edge-type dislocations tend to remain within the bulk of the laths and so, the majority of the dislocations crossing the lath interfaces are of the screw type. Since the mobile screw dislocations are in general parallel to the lath interfaces (see Section 3.2), clear surface markings are rather un-frequent, even after straining to 8% (see also [11], for details).…”

“…The debris loops are emitted when proper kink pair nucleation events induce line reconnection in a single slip plane [15]. In principle, the cross-kinks are obstacles to dislocation motion and can participate to mobile dislocation exhaustion, especially at low temperature, where dislocation pinning is weak and infrequent [11]. Screw dislocation motion associated with very active, random cross-slip and loop debris emission is sometimes called 'rough' [15].…”

“…Comparison between Fig. 8(a) and (b) readily shows that the dislocations in lath-3 have the same Burgers vector (b = a/2 [1][2][3][4][5][6][7][8][9][10][11]) as the dislocations in the lath-2/3 boundary, where small inter-lath carbide needles are also visible.…”

“…The dislocation structures and surface slip markings obtained at T = À196°C are described in more details in [11], where {1 1 0}h1 1 1i active slip systems are evidenced. The typical dislocation arrangement at 2.5% plastic strain is shown in Fig.…”

Effect of Plastic Strain Range on Prediction of the Onset of Crack Growth for Low-Cycle Fatigue of SUS316NG Studied using Ultrasonic Back-Reflection

“…(4), we assume L = 160 nm (20)(21)(22) , 15 The second method to predict the remaining life before the start of crack growth relies on the cumulative plastic strain. From Fig.…”