Observation of a new dynamic recovery mechanism in the high strain regime

Tianbo Yu; Niels Hansen; Xiaoxu Huang; Andy Godfrey

Observation of a new dynamic recovery mechanism in the high strain regime

Tianbo Yu, Niels Hansen, Xiaoxu Huang, Andy Godfrey

Department of Wind Energy

Research output: Contribution to journal › Conference article › Research › peer-review

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Abstract

Plastic deformation of metals refines the microstructure and increases the strength through work hardening, but this effect of deformation is counterbalanced by dynamic recovery. After deformation to large strains, the microstructure typically shows a lamellar morphology, with finely spaced lamellar boundaries connected by triple junctions. Here we report that mechanically assisted triple junction motion is an important mechanism of dynamic recovery, and it replaces two boundaries by one, while maintaining the structural morphology. The observation rationalizes many features of the evolution of microstructure and strength in metals deformed to large strains, including an approach to a steady state.

Original language	English
Journal	Proceedings of the Risø International Symposium on Materials Science
Volume	35
Pages (from-to)	493-500
ISSN	0907-0079
Publication status	Published - 2014
Event	35th Risø International Symposium on Materials Science : New Frontiers of Nanometals - DTU, Risø Campus, Roskilde, Denmark Duration: 1 Sep 2014 → 5 Sep 2014 Conference number: 35

Conference

Conference	35th Risø International Symposium on Materials Science : New Frontiers of Nanometals
Number	35
Location	DTU, Risø Campus
Country	Denmark
City	Roskilde
Period	01/09/2014 → 05/09/2014

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title = "Observation of a new dynamic recovery mechanism in the high strain regime",

abstract = "Plastic deformation of metals refines the microstructure and increases the strength through work hardening, but this effect of deformation is counterbalanced by dynamic recovery. After deformation to large strains, the microstructure typically shows a lamellar morphology, with finely spaced lamellar boundaries connected by triple junctions. Here we report that mechanically assisted triple junction motion is an important mechanism of dynamic recovery, and it replaces two boundaries by one, while maintaining the structural morphology. The observation rationalizes many features of the evolution of microstructure and strength in metals deformed to large strains, including an approach to a steady state.",

author = "Tianbo Yu and Niels Hansen and Xiaoxu Huang and Andy Godfrey",

year = "2014",

language = "English",

volume = "35",

pages = "493--500",

journal = "Proceedings of the Ris{\o} International Symposium on Materials Science",

issn = "0907-0079",

publisher = "Ris{\o} National Laboratory",

note = "35th Ris{\o} International Symposium on Materials Science : New Frontiers of Nanometals ; Conference date: 01-09-2014 Through 05-09-2014",

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T1 - Observation of a new dynamic recovery mechanism in the high strain regime

AU - Yu, Tianbo

AU - Hansen, Niels

AU - Huang, Xiaoxu

AU - Godfrey, Andy

N1 - Conference code: 35

PY - 2014

Y1 - 2014

N2 - Plastic deformation of metals refines the microstructure and increases the strength through work hardening, but this effect of deformation is counterbalanced by dynamic recovery. After deformation to large strains, the microstructure typically shows a lamellar morphology, with finely spaced lamellar boundaries connected by triple junctions. Here we report that mechanically assisted triple junction motion is an important mechanism of dynamic recovery, and it replaces two boundaries by one, while maintaining the structural morphology. The observation rationalizes many features of the evolution of microstructure and strength in metals deformed to large strains, including an approach to a steady state.

AB - Plastic deformation of metals refines the microstructure and increases the strength through work hardening, but this effect of deformation is counterbalanced by dynamic recovery. After deformation to large strains, the microstructure typically shows a lamellar morphology, with finely spaced lamellar boundaries connected by triple junctions. Here we report that mechanically assisted triple junction motion is an important mechanism of dynamic recovery, and it replaces two boundaries by one, while maintaining the structural morphology. The observation rationalizes many features of the evolution of microstructure and strength in metals deformed to large strains, including an approach to a steady state.

M3 - Conference article

VL - 35

SP - 493

EP - 500

JO - Proceedings of the Risø International Symposium on Materials Science

JF - Proceedings of the Risø International Symposium on Materials Science

SN - 0907-0079

T2 - 35th Risø International Symposium on Materials Science : New Frontiers of Nanometals

Y2 - 1 September 2014 through 5 September 2014

ER -