Do cracks melt their way through solids?

Okamoto, P.R.; Lam, Nghi Q.; Ohnuki, Somei

doi:10.1093/oxfordjournals.jmicro.a023705

Cited by 6 publications

(2 citation statements)

References 5 publications

(10 reference statements)

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“…It should be mentioned that the width ΔT c ≈ 300 K of the region of existence of the transformational PZ has been, indeed, observed during glass transition at the tip of a propagating crack in NiTi [142]. Other papers have not revealed the whole region of existence.…”

Section: Typical Values Of the Temperature Shiftmentioning

confidence: 98%

Field-theoretical description of the formation of a crack tip process zone

Boulbitch

Korzhenevskii

2016

Eur. Phys. J. B

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The crack tip process zone is regarded as a region where the solid physical properties are altered due to high stress. They are controlled by the solid degrees of freedom existing within the zone and vanishing outside, and can be divided into two classes: (1) zones always existing at the tip and (2) those emerging as soon as certain conditions are met. We focus on the zones of the second kind and argue that they can be described analogously to phase transitions taking place locally. We report both a numerical and an analytical solution for the process zone. We find that the zone can only exist within a limited domain of the dynamic phase diagram, at one side of the phase transition line. We describe this domain and establish its dependence on the crack velocity. We show the existence of a critical crack velocity above which the zone cannot exist.

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Section: Typical Values Of the Temperature Shiftmentioning

confidence: 98%

Field-theoretical description of the formation of a crack tip process zone

Boulbitch

Korzhenevskii

2016

Eur. Phys. J. B

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“…In situ fracture studies on thin films of the NiTi intermetallic compound (Okamoto et al, 1999(Okamoto et al, , 1998 revealed stress-induced amorphization of regions directly in front of moving crack tips in a temperature range 300-600 K. MD simulations in (Lynden-Bell, 1995) suggests that fcc crystals of the metals (platinum, gold, rhodium, and silver) under uniaxial tension at temperatures above half the melting temperature disordered before they failed by void formation.…”

Section: Virtual Melting As a Possible Mechanism Of Fracturementioning

confidence: 99%

A diffuse interface approach to phase transformation via virtual melting

Momeni

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This work represents development of the first phase field models and detailed study solidsolid transformations via intermediate melting within nanometer size interface. Such phase transformations can occur in different materials, including HMX energetic crystals, PbTiO 3 nanowires, complex pharmaceutical substances, electronic and geological materials, as well as colloidal, and superhard materials. A thermodynamically consistent phase field model for three phases is developed using two polar order parameters. It includes the effect of energy and width of solid-solid and solid-melt interfaces, interaction between two solid-melt interfaces, temperature, mechanics, and interface stresses. The derived thermodynamic potential satisfies

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Temperature of emergence of a transformational process zone at a crack tip

Boulbitch¹,

Korzhenevskii

2017

Phys. Rev. B

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Do cracks melt their way through solids?

Cited by 6 publications

References 5 publications

Field-theoretical description of the formation of a crack tip process zone

Field-theoretical description of the formation of a crack tip process zone

A diffuse interface approach to phase transformation via virtual melting

Temperature of emergence of a transformational process zone at a crack tip

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