Rebinder effect in the fracture of Armco iron in liquid metals

Попович, В. В.; Dmukhovskaya, I. G.

doi:10.1007/bf01154711

Cited by 18 publications

(8 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some cases of LME by bismuth for other steels have been only reported by Old [5]. Furthermore the LME sensitivity by the liquid bismuth of the Armco iron has been studied by Popovich et al who have shown a large effect of the temperature on LME occurrence [35,36]. In the present study, the effect of bismuth is more important at 300 °C than at 400 °C.…”

Section: Discussionsupporting

confidence: 49%

Liquid metal embrittlement sensitivity of the T91 steel in lead, in bismuth and in lead-bismuth eutectic

Serre

Vogt

2020

Journal of Nuclear Materials

View full text Add to dashboard Cite

HighlightsStudy of liquid metal embrittlement sensitivity of the martensitic T91 steel by Pb, Bi and LBE The most embrittling liquid metal is LBE, then bismuth while the less one is lead T91 steel loaded in Bi, Pb or LBE presents a ductile behaviour at 300 °C and at 400 °C except in LBE at very slow strain rate According to the temperature and the strain rate, observation of localized brittle fracture surface in presence of LBE and Bi Data availabilityProtocols, test conditions and material characteristics are presented in detail in the text.

show abstract

Section: Discussionsupporting

confidence: 49%

Liquid metal embrittlement sensitivity of the T91 steel in lead, in bismuth and in lead-bismuth eutectic

Serre

Vogt

2020

Journal of Nuclear Materials

View full text Add to dashboard Cite

show abstract

“…56,69 In our simulation, we observe interfacial dislocations forming at the grain-boundary groove root on the grain boundary which climb down by a diffusional process, while, in the previous models, lattice dislocations are nucleated by plastic deformation near the LME crack tip and glide away. While we do observe the development of a long, liquid-filled groove ͑zero traction along the surface͒, the dislocation process that we discuss here begins long before a liquid-filled cracklike groove forms and continues to operate even after such a cracklike groove begins to propagate.…”

Section: Discussionmentioning

confidence: 53%

Molecular dynamics simulation of Ga penetration alongΣ5symmetric tilt grain boundaries in an Al bicrystal

Nam

Srolovitz

2007

Phys. Rev. B

View full text Add to dashboard Cite

Liquid metal embrittlement ͑LME͒ is a common feature of systems in which a low melting point liquid metal is in contact with another, higher melting point, polycrystalline metal. While different systems exhibit different LME fracture characteristics, the penetration of nanometer-thick liquid metal films along the grain boundary is one of the hallmarks of the process. We employ EAM potentials optimized for Al-Ga binary alloys in a series of molecular dynamics simulations of an Al bicrystal ͑with a ⌺5 36.9°͑301͒/͓010͔ symmetric tilt boundary͒ in contact with liquid Ga with and without an applied stress. Our simulations clarify the mechanism of LME and how it is affected by applied stresses. The interplay of stress and penetrating Ga atoms leads to the nucleation of a train of dislocations on the grain boundary below the liquid groove root which climbs down the grain boundary at a nearly constant rate. The dislocation climb mechanism and the Ga penetration are coupled. While the dislocations do relax part of the applied stress, the residual stresses keep the grain boundary open, thereby allowing more, fast Ga transport to the penetration front ͑i.e., Ga layer thickening process͒. The coupled Ga transport and "dislocation climb" is the key to the anomalously fast, time-independent penetration of Ga along grain boundaries in Al. The simulations explain a wide range of experimental observations of LME in the Al-Ga literature.

show abstract

“…Popovitch and Dmukhovskaya [4,5] link the embrittling effect to the Dynamic Strain Ageing (DSA) phenomenon exhibited by the studied steels in the same temperature range. Their interpretation of LME [6,7] is that the occurrence of bulk hardening by DSA, jointly with a decrease in the surface energy, leads to an increased surface plasticity.…”

Section: -Introductionmentioning

confidence: 99%