TY - JOUR
T1 - Influence of grain size and grain boundaries on the thermal and mechanical behavior of 70/30 brass under electrically-assisted deformation
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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U2 - 10.1016/j.msea.2013.02.066
DO - 10.1016/j.msea.2013.02.066
M3 - Article
AN - SCOPUS:84875947979
SN - 0921-5093
VL - 574
SP - 218
EP - 225
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
ER -