The influence of triaxial stress on the ideal tensile strength of iron

Clatterbuck, D. M.; Chrzan, D. C.; Morris, J. W.

doi:10.1016/s1359-6462(03)00490-1

Cited by 51 publications

(33 citation statements)

References 19 publications

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“…According to the IPFEM calculation, the corresponding local maximum shear stress on (101), (123) and (112) [37]. In other words, under the triaxial stress loading condition (possible confined pressure effect) and the confinement by the oxide layer in our tests [22][23][24]38,39], the upper bound of experimentally measured critical shear stress for yielding indeed close to the theoretical shear strength of iron.…”

Section: Submitted Tosupporting

confidence: 60%

From “Smaller is Stronger” to “Size‐Independent Strength Plateau”: Towards Measuring the Ideal Strength of Iron

et al. 2015

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Section: Submitted Tosupporting

confidence: 60%

From “Smaller is Stronger” to “Size‐Independent Strength Plateau”: Towards Measuring the Ideal Strength of Iron

et al. 2015

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“…2,7,8) The brittle fracture stress, σ F, is the lower of the stresses associated with the possible mechanisms of brittle fracture. Here we consider brittle fracture by the inherent low-temperature mode in ferritic steel: 9,10) transgranular cleavage on the {100} cleavage planes.…”

Section: Introductionmentioning

confidence: 99%

On the Ductile-Brittle Transition in Lath Martensitic Steel

Morris

2011

ISIJ Int.

131

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The inherent brittle mode in dislocated lath martensitic steel is cleavage on {100} planes in the microstructure. The transition to {100} cleavage fracture on cooling determines the minimum value of the ductiule-brittle transition temperature. A half-century of research on the microstructure and toughness of lath martensitic steels has produced a semi-quantitative understanding of the brittle transition to cleavage. The results identify the crystallographic "block" of lath martensite as the effective grain size that controls cleavage, and clarify why the internal structure of a block has the microstructure it adopts. The ductilebrittle transition temperature is strongly affected by the block size. Several effective metallurgical processes are now available to refine the block size without excessive strengthening, leading to martensitic structural steels that combine high strength with good low-temperature toughness.

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“…The theoretical strength of a material is defined as the stress at which a homogeneously deformed perfect crystal becomes elastically unstable with respect to internal displacements [1]. Mobile dislocations, grain boundaries, cracks, and other microstructural defects may significantly change the strength of a real crystal but they can never raise the strength above its ideal value [2].…”

Section: Introductionmentioning

confidence: 99%

“…The structural stability and theoretical strength of the body-centered cubic (BCC) Fe crystal under [100] uniaxial [8,15], triaxial [1], <111>{112} and <111>{110} shear [15], [001], [111] and hydrostatic [17] loading have been investigated with two-body Morse interatomic-potential function [8] and Ab initio calculation [1,15,17]. In this paper, the theoretical strength and structural response of BCC Fe crystal under [110] uniaxial loading have been investigated with MAEAM.…”

Section: Introductionmentioning

confidence: 99%

The structural response of BCC Fe lattice loaded in [110] direction

Wang

Zhang²,

2009

Cryst. Res. Technol.

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The structural response of BCC Fe lattice loaded in [110] direction has been investigated with MAEAM. The results show that, even if an orthorhombic path (b 2 ≠b 3 ) is applied, the deformation is spontaneous along the tetragonal path (b 2 ≡b 3 ) while b 1 is less than 0.3449 nm in compressive region. In addition to the initial BCC phase, a BCT phase and the other BCC phase appear also at stress-free states. The BCT phase with the local maximum internal energy of -4.227 eV is unstable and would slip spontaneously into the appeared BCC phase with the same minimum internal energy of -4.280 eV as the initial BCC phase. The stable region ranges from -43.87 eV/nm 3 to 44.06 eV/nm 3 in the theoretical strength or from -7.34% to 6.49% in the strain correspondingly. Furthermore, the relations B 11 =B 22 , B 13 =B 23 and B 44 =B 55 occur at the initial state.

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The influence of triaxial stress on the ideal tensile strength of iron

Cited by 51 publications

References 19 publications

From “Smaller is Stronger” to “Size‐Independent Strength Plateau”: Towards Measuring the Ideal Strength of Iron

From “Smaller is Stronger” to “Size‐Independent Strength Plateau”: Towards Measuring the Ideal Strength of Iron

On the Ductile-Brittle Transition in Lath Martensitic Steel

The structural response of BCC Fe lattice loaded in [110] direction

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