Influence of grain size and grain boundaries on the thermal and mechanical behavior of 70/30 brass under electrically-assisted deformation

Rong Fan; James Magargee; Ping Hu; Jian Cao

doi:10.1016/j.msea.2013.02.066

Influence of grain size and grain boundaries on the thermal and mechanical behavior of 70/30 brass under electrically-assisted deformation

Rong Fan, James Magargee, Ping Hu, Jian Cao^*

^*Corresponding author for this work

Mechanical Engineering

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

130 Scopus citations

Abstract

The influence of grain size and grain boundaries on the thermal and mechanical behavior of 70/30 brass was studied during tension tests in which electric current was applied in conjunction with mechanical deformation. Decreasing grain size was observed to increase Joule heating and increase stress reductions during electrically-assisted deformation. Additionally, a larger decrease in material flow stress was observed in electrically-assisted tests compared to oven-heated thermal tension tests at similar temperatures, however, at a different heating rate supporting that the presence of an additional electrical-mechanical interaction during electrically-assisted deformation might be time sensitive. Observations of microstructure revealed the occurrence of local intergranular cavitation as well as a new phenomenon not yet associated with electrically-assisted deformation, local grain boundary melting, during high current density experiments. These results provide additional discussion materials for the enhanced plastic deformation associated with electrically-assisted deformation.

Original language	English (US)
Pages (from-to)	218-225
Number of pages	8
Journal	Materials Science and Engineering: A
Volume	574
DOIs	https://doi.org/10.1016/j.msea.2013.02.066
State	Published - Jul 1 2013

Funding

This research would like to acknowledge the financial support from China Scholarship Council and the National Science Foundation (US) , and from the Key Project of the National Natural Science Foundation of China (Nos. 10932003 , 11272075 ), “973”National Basic Research Project of China (No. 2010CB832700 ). These supports are gratefully acknowledged. Many thanks are to the referees for their valuable comments. This work made use of Central Facilities at Northwestern University: Electron Probe Instrumentation Center; and the Central Laboratory for Material Mechanical Properties (DMR-0520513) and Optical Microscopy & Metallography facility (DMR-1121262) supported by the National Science Foundation at Northwestern University Materials Research Science and Engineering Center .

Keywords

Electrically-assisted deformation
Electroplasticity
Grain boundaries
Grain boundary melting
Intergranular cavitation

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.msea.2013.02.066

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title = "Influence of grain size and grain boundaries on the thermal and mechanical behavior of 70/30 brass under electrically-assisted deformation",

abstract = "The influence of grain size and grain boundaries on the thermal and mechanical behavior of 70/30 brass was studied during tension tests in which electric current was applied in conjunction with mechanical deformation. Decreasing grain size was observed to increase Joule heating and increase stress reductions during electrically-assisted deformation. Additionally, a larger decrease in material flow stress was observed in electrically-assisted tests compared to oven-heated thermal tension tests at similar temperatures, however, at a different heating rate supporting that the presence of an additional electrical-mechanical interaction during electrically-assisted deformation might be time sensitive. Observations of microstructure revealed the occurrence of local intergranular cavitation as well as a new phenomenon not yet associated with electrically-assisted deformation, local grain boundary melting, during high current density experiments. These results provide additional discussion materials for the enhanced plastic deformation associated with electrically-assisted deformation.",

keywords = "Electrically-assisted deformation, Electroplasticity, Grain boundaries, Grain boundary melting, Intergranular cavitation",

author = "Rong Fan and James Magargee and Ping Hu and Jian Cao",

note = "Funding Information: This research would like to acknowledge the financial support from China Scholarship Council and the National Science Foundation (US) , and from the Key Project of the National Natural Science Foundation of China (Nos. 10932003 , 11272075 ), “973”National Basic Research Project of China (No. 2010CB832700 ). These supports are gratefully acknowledged. Many thanks are to the referees for their valuable comments. Funding Information: This work made use of Central Facilities at Northwestern University: Electron Probe Instrumentation Center; and the Central Laboratory for Material Mechanical Properties (DMR-0520513) and Optical Microscopy & Metallography facility (DMR-1121262) supported by the National Science Foundation at Northwestern University Materials Research Science and Engineering Center .",

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language = "English (US)",

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AU - Fan, Rong

AU - Magargee, James

AU - Hu, Ping

AU - Cao, Jian

N1 - Funding Information: This research would like to acknowledge the financial support from China Scholarship Council and the National Science Foundation (US) , and from the Key Project of the National Natural Science Foundation of China (Nos. 10932003 , 11272075 ), “973”National Basic Research Project of China (No. 2010CB832700 ). These supports are gratefully acknowledged. Many thanks are to the referees for their valuable comments. Funding Information: This work made use of Central Facilities at Northwestern University: Electron Probe Instrumentation Center; and the Central Laboratory for Material Mechanical Properties (DMR-0520513) and Optical Microscopy & Metallography facility (DMR-1121262) supported by the National Science Foundation at Northwestern University Materials Research Science and Engineering Center .

PY - 2013/7/1

Y1 - 2013/7/1

N2 - The influence of grain size and grain boundaries on the thermal and mechanical behavior of 70/30 brass was studied during tension tests in which electric current was applied in conjunction with mechanical deformation. Decreasing grain size was observed to increase Joule heating and increase stress reductions during electrically-assisted deformation. Additionally, a larger decrease in material flow stress was observed in electrically-assisted tests compared to oven-heated thermal tension tests at similar temperatures, however, at a different heating rate supporting that the presence of an additional electrical-mechanical interaction during electrically-assisted deformation might be time sensitive. Observations of microstructure revealed the occurrence of local intergranular cavitation as well as a new phenomenon not yet associated with electrically-assisted deformation, local grain boundary melting, during high current density experiments. These results provide additional discussion materials for the enhanced plastic deformation associated with electrically-assisted deformation.

AB - The influence of grain size and grain boundaries on the thermal and mechanical behavior of 70/30 brass was studied during tension tests in which electric current was applied in conjunction with mechanical deformation. Decreasing grain size was observed to increase Joule heating and increase stress reductions during electrically-assisted deformation. Additionally, a larger decrease in material flow stress was observed in electrically-assisted tests compared to oven-heated thermal tension tests at similar temperatures, however, at a different heating rate supporting that the presence of an additional electrical-mechanical interaction during electrically-assisted deformation might be time sensitive. Observations of microstructure revealed the occurrence of local intergranular cavitation as well as a new phenomenon not yet associated with electrically-assisted deformation, local grain boundary melting, during high current density experiments. These results provide additional discussion materials for the enhanced plastic deformation associated with electrically-assisted deformation.

KW - Electrically-assisted deformation

KW - Electroplasticity

KW - Grain boundaries

KW - Grain boundary melting

KW - Intergranular cavitation

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Influence of grain size and grain boundaries on the thermal and mechanical behavior of 70/30 brass under electrically-assisted deformation

Abstract

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ASJC Scopus subject areas

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