Microstructure of a reactor pressure vessel steel close to the zones of ductile tearing and cleavage

Karlı́k, Miroslav; Nedbal, I.; Siegl, J.

doi:10.1016/s0921-5093(03)00171-0

Cited by 23 publications

(15 citation statements)

References 23 publications

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“…10(c)). In this material, elongated cells have been observed next to the rupture surface of CT specimens, after very large plastic strains due to ductile tearing [10]. Thus, the cell structures in Fig.…”

Section: Dislocation Arrangements At 0°cmentioning

confidence: 61%

“…where a is a coefficient, characterizing the obstacle strength 10 and l is the shear modulus. Differentiating equation- (8) with respect to e yields 6 Since a multi-axial loading generates stress components facilitating the activation of cross-slip.…”

Section: Discussionmentioning

confidence: 99%

“…9 As mentioned above, the dislocation cell size scales with the lath size, in A or B directions. 10 The strength of the lath boundaries, in that case. laboratory, with the kind support of Dr L. Boulanger.…”

Section: Discussionmentioning

confidence: 99%

“…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.…”

Section: Dislocation Arrangements At T = 25°c and 11% Plastic Strainmentioning

confidence: 99%

See 3 more Smart Citations

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

Robertson

Obrtlík

Marini

2007

Journal of Nuclear Materials

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Section: Dislocation Arrangements At 0°cmentioning

confidence: 61%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Dislocation Arrangements At T = 25°c and 11% Plastic Strainmentioning

confidence: 99%

See 2 more Smart Citations

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

Robertson

Obrtlík

Marini

2007

Journal of Nuclear Materials

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“…In particular, it is critical to determine the location and magnitude of residual stresses in dissimilar metal welds because operational experience shows that serious cracking often initiates in the transition zone between the different materials, where residual stresses combine with applied loading and degrade material properties under extreme operating conditions [6,7]. A typical example of the dissimilar metal joining structure is the ferritic carbon steel (SA508) and austenitic stainless steel (316L) weld for the pressurized water reactor in nuclear power plants [8].…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional mapping of residual stresses in a thick dissimilar weld using contour method, deep hole drilling, and neutron diffraction

Woo¹,

An²,

Truman³

et al. 2016

J Mater Sci

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Residual stress variations were determined through the thickness of a 70-mm thick ferriticaustenitic dissimilar steel weld using contour method, deep hole drilling, and neutron diffraction. The result shows that significant tensile stresses were distributed distinctly along the interface between ferritic and austenitic phases. The band of the large tensile stresses was about 8 mm wide and the magnitude reached 400 MPa, which is approaching 100% of the yield strength of the base metal, near the top surface (about 15% of the depth). It is attributed to the large difference (5.8 x 10 -6 1/°C) of the thermal expansion coefficient between ferritic and austenitic steels of the interface. The microstructure analysis elucidates that the martensitic phase prevailed near the interface and results in microhardness increases.

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Statistical analysis and recovery behaviors of dislocations in cold‐rolled and annealed reactor pressure vessel steels

Liu

Wang

et al. 2023

Materialwissenschaft Werkst

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The statistical analysis and recovery behavior of dislocations in cold‐rolled and annealed reactor pressure vessel steels with a thickness reduction of 50 % were investigated by using x‐ray diffraction and electron backscattered diffraction analysis in this study. A new modified Kubin & Mortensen's method was proposed to evaluate the geometrically necessary dislocation density, and this method could effectively improve the accuracy of geometrically necessary dislocation evaluation by eliminating the effect of step size and measurement noises. Comparison analysis between modified Williamson‐Hall and modified Kubin & Mortensen's methods was also performed in this study, which shows different recovery behavior of dislocations. The electron backscattered diffraction results show that geometrically necessary dislocation density remained unchangeable after annealing treatment below and at 550 °C, and it occurred to decrease above 550 °C due to the occurrence of recrystallization. However, dislocations started to migrate and annihilate at 340 °C according to x‐ray diffraction results. A possible explanation is a difference in the effect of pairwise dislocation annihilation on statistically stored dislocations and geometrically necessary dislocations.

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Microstructure of a reactor pressure vessel steel close to the zones of ductile tearing and cleavage

Cited by 23 publications

References 23 publications

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

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

Two-dimensional mapping of residual stresses in a thick dissimilar weld using contour method, deep hole drilling, and neutron diffraction

Statistical analysis and recovery behaviors of dislocations in cold‐rolled and annealed reactor pressure vessel steels

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