Observation of Grain Boundaries with the Field-Ion Microscope

Fortes, M. A.; Smith, D. A.

doi:10.1063/1.1659229

Cited by 22 publications

(4 citation statements)

References 22 publications

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“…Field ion microscopy (FIM), invented by Erwin Mu¨ller, [362] was the first technique to image individual atoms on the surface of a metal, [363] as well as crystalline defects such as vacancies [364] and voids, [365] dislocations, [366] and grain boundaries [367] in pure metals.…”

Section: Use Of Field Ion Microscopy For Studying Advanced High-stmentioning

confidence: 99%

Current Challenges and Opportunities in Microstructure-Related Properties of Advanced High-Strength Steels

Raabe

Sun

Silva

et al. 2020

Metall Mater Trans A

140

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This is a viewpoint paper on recent progress in the understanding of the microstructure–property relations of advanced high-strength steels (AHSS). These alloys constitute a class of high-strength, formable steels that are designed mainly as sheet products for the transportation sector. AHSS have often very complex and hierarchical microstructures consisting of ferrite, austenite, bainite, or martensite matrix or of duplex or even multiphase mixtures of these constituents, sometimes enriched with precipitates. This complexity makes it challenging to establish reliable and mechanism-based microstructure–property relationships. A number of excellent studies already exist about the different types of AHSS (such as dual-phase steels, complex phase steels, transformation-induced plasticity steels, twinning-induced plasticity steels, bainitic steels, quenching and partitioning steels, press hardening steels, etc.) and several overviews appeared in which their engineering features related to mechanical properties and forming were discussed. This article reviews recent progress in the understanding of microstructures and alloy design in this field, placing particular attention on the deformation and strain hardening mechanisms of Mn-containing steels that utilize complex dislocation substructures, nanoscale precipitation patterns, deformation-driven transformation, and twinning effects. Recent developments on microalloyed nanoprecipitation hardened and press hardening steels are also reviewed. Besides providing a critical discussion of their microstructures and properties, vital features such as their resistance to hydrogen embrittlement and damage formation are also evaluated. We also present latest progress in advanced characterization and modeling techniques applied to AHSS. Finally, emerging topics such as machine learning, through-process simulation, and additive manufacturing of AHSS are discussed. The aim of this viewpoint is to identify similarities in the deformation and damage mechanisms among these various types of advanced steels and to use these observations for their further development and maturation.

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Section: Use Of Field Ion Microscopy For Studying Advanced High-stmentioning

confidence: 99%

Current Challenges and Opportunities in Microstructure-Related Properties of Advanced High-Strength Steels

Raabe

Sun

Silva

et al. 2020

Metall Mater Trans A

140

View full text Add to dashboard Cite

show abstract

“…Field-ion microscopy (FIM), an important technique developed since 1960s, has contributed significantly in characterizing GB structure with high resolution. [13][14][15][16][17] Nevertheless, according to Fortes and Smith, 18 atomic arrangement at a GB is difficult to deduce from FIM micrographs due to various limiting factors. So far, the structure of GBs is far from well understood.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Atomic Structure of Grain Boundaries Resolved by Atomic-Resolution Electron Tomography

Wang

Duan

Chen

et al. 2020

Matter

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“…Different methods such as decoration (Hedges andMitchell 1953, Amelinckx 1956), electron microscopy (Ball and Hirsch 1955), x ray topography (Lang and Miles 1965) and field-ion microscopy (Ranganathan 1966, Fortes andSmith 1970) have been used to study the fine structure of the grain boundaries and dislocation configurations inside the crystal. In this paper we show how etching can be used to study the substructure of the grain boundaries and dislocation networks.…”

Section: Introductionmentioning

confidence: 99%

Absolutes of Topological Spaces and Their Continuous Maps

Ponomarev¹,

Shapiro²

1976

Russ. Math. Surv.

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Dissolution studies were carried out on NaCl crystals, some pure and some doped with various impurities. It was observed that etch pits associated with beaks are obtained only in NaCl crystals doped with CaC12, if the etchant reported by Hari Babu and Bansigir is used. Of the 26 poisons studied with methyl alcohol as base, only a few of the cadmium and lead salts are capable of giving beaks in NaCI:CaCh, whereas with the other poisons etch pits without beaks are obtained. These investigations reveal that the poison, the solvent and the impurity decorating the dislocation line influence the formation of beaks in NaCl crystals. The substructure of the grain boundaries in NaCl:CaC12 crystals has been revealed for the first time, by employing the etching technique. Different types of grain boundaries, junctions between the boundaries and dislocation networks have been recorded.

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Observation of Grain Boundaries with the Field-Ion Microscope

Cited by 22 publications

References 22 publications

Current Challenges and Opportunities in Microstructure-Related Properties of Advanced High-Strength Steels

Current Challenges and Opportunities in Microstructure-Related Properties of Advanced High-Strength Steels

Three-Dimensional Atomic Structure of Grain Boundaries Resolved by Atomic-Resolution Electron Tomography

Absolutes of Topological Spaces and Their Continuous Maps

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