High-temperature dislocation-precipitate interactions in Al alloys: An in situ transmission electron microscopy deformation study

B. G. Clark; Ian M. Robertson; L. M. Dougherty; D. C. Ahn; P. Sofronis

doi:10.1557/JMR.2005.0224

High-temperature dislocation-precipitate interactions in Al alloys: An in situ transmission electron microscopy deformation study

B. G. Clark, Ian M. Robertson, L. M. Dougherty, D. C. Ahn, P. Sofronis

Research output: Contribution to journal › Article › peer-review

40 Citations (Scopus)

Abstract

The fundamental processes controlling the high-temperature interaction of dislocations with precipitates in Al-alloys were investigated in real time by deforming specimens in situ in the transmission electron microscope at elevated temperature. The observations support a bypass mechanism involving the interaction of lattice dislocations with the precipitate-matrix interface dislocations, where the rate-limiting step in the interaction is the release of the dislocation from the particle. These observations are discussed in relation to high-temperature deformation processes and models.

Original language	English
Pages (from-to)	1792-1801
Number of pages	10
Journal	Journal of Materials Research
Volume	20
Issue number	7
DOIs	https://doi.org/10.1557/JMR.2005.0224
Publication status	Published - Jul 2005
Externally published	Yes

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1557/JMR.2005.0224

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title = "High-temperature dislocation-precipitate interactions in Al alloys: An in situ transmission electron microscopy deformation study",

abstract = "The fundamental processes controlling the high-temperature interaction of dislocations with precipitates in Al-alloys were investigated in real time by deforming specimens in situ in the transmission electron microscope at elevated temperature. The observations support a bypass mechanism involving the interaction of lattice dislocations with the precipitate-matrix interface dislocations, where the rate-limiting step in the interaction is the release of the dislocation from the particle. These observations are discussed in relation to high-temperature deformation processes and models.",

author = "Clark, {B. G.} and Robertson, {Ian M.} and Dougherty, {L. M.} and Ahn, {D. C.} and P. Sofronis",

note = "Funding Information: Microscopy presented in this work was performed in the Center for Microanalysis of Materials at the University of Illinois which is partially supported by the United States Department of Energy under Grant No. DEFG02-91-ER45439. We wish to thank our sponsors, the United States Department of Energy (DOE DEFC07-01ID14190), Pacific Northwest National Laboratory, the National Science Foundation (NSF DMR02-44562), and Alcoa, for their support.",

year = "2005",

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doi = "10.1557/JMR.2005.0224",

language = "English",

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T2 - An in situ transmission electron microscopy deformation study

AU - Clark, B. G.

AU - Robertson, Ian M.

AU - Dougherty, L. M.

AU - Ahn, D. C.

AU - Sofronis, P.

N1 - Funding Information: Microscopy presented in this work was performed in the Center for Microanalysis of Materials at the University of Illinois which is partially supported by the United States Department of Energy under Grant No. DEFG02-91-ER45439. We wish to thank our sponsors, the United States Department of Energy (DOE DEFC07-01ID14190), Pacific Northwest National Laboratory, the National Science Foundation (NSF DMR02-44562), and Alcoa, for their support.

PY - 2005/7

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AB - The fundamental processes controlling the high-temperature interaction of dislocations with precipitates in Al-alloys were investigated in real time by deforming specimens in situ in the transmission electron microscope at elevated temperature. The observations support a bypass mechanism involving the interaction of lattice dislocations with the precipitate-matrix interface dislocations, where the rate-limiting step in the interaction is the release of the dislocation from the particle. These observations are discussed in relation to high-temperature deformation processes and models.

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High-temperature dislocation-precipitate interactions in Al alloys: An in situ transmission electron microscopy deformation study

Abstract

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