Temperature and grain size dependent plastic instability and strain rate sensitivity of ultrafine grained austenitic Fe-14Cr-16Ni alloy

C. Sun; J. Ma; Y. Yang; K. T. Hartwig; S. A. Maloy; H. Wang; X. Zhang

doi:10.1016/j.msea.2014.01.003

Temperature and grain size dependent plastic instability and strain rate sensitivity of ultrafine grained austenitic Fe-14Cr-16Ni alloy

C. Sun
, J. Ma
, Y. Yang
, K. T. Hartwig
, S. A. Maloy
, H. Wang
, X. Zhang

Materials and Fuels Complex

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

23 Scopus citations

Abstract

In this study temperature and grain size dependent plastic instability and strain rate sensitivity (SRS) were investigated for coarse grained (CG) and ultrafine grained (UFG) austenitic Fe-14Cr-16Ni alloys. As tensile testing temperature increased from 20 to 200. °C, UFG alloys exhibited much more prominent decrease of uniform strain compared with CG counterparts. Transmission electron microscopy (TEM) analysis of deformed UFG alloys revealed temperature dependent evolution of microstructures. Through grain refinement, the SRS of Fe-14Cr-16Ni alloy increased and activation volume decreased, which may be related to the interactions of dislocations with grain boundaries. The SRS of UFG alloys exhibited greater temperature dependence than CG alloys.

Original language	English
Pages (from-to)	415-421
Number of pages	7
Journal	Materials Science and Engineering: A
Volume	597
DOIs	https://doi.org/10.1016/j.msea.2014.01.003
State	Published - Mar 12 2014

Keywords

Austenitic Fe-Cr-Ni alloy
Plastic instability
Strain rate sensitivity
Temperature
Ultrafine grain

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10.1016/j.msea.2014.01.003

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title = "Temperature and grain size dependent plastic instability and strain rate sensitivity of ultrafine grained austenitic Fe-14Cr-16Ni alloy",

abstract = "In this study temperature and grain size dependent plastic instability and strain rate sensitivity (SRS) were investigated for coarse grained (CG) and ultrafine grained (UFG) austenitic Fe-14Cr-16Ni alloys. As tensile testing temperature increased from 20 to 200. °C, UFG alloys exhibited much more prominent decrease of uniform strain compared with CG counterparts. Transmission electron microscopy (TEM) analysis of deformed UFG alloys revealed temperature dependent evolution of microstructures. Through grain refinement, the SRS of Fe-14Cr-16Ni alloy increased and activation volume decreased, which may be related to the interactions of dislocations with grain boundaries. The SRS of UFG alloys exhibited greater temperature dependence than CG alloys.",

keywords = "Austenitic Fe-Cr-Ni alloy, Plastic instability, Strain rate sensitivity, Temperature, Ultrafine grain",

author = "C. Sun and J. Ma and Y. Yang and Hartwig, \{K. T.\} and Maloy, \{S. A.\} and H. Wang and X. Zhang",

note = "Funding Information: We acknowledge financial support by DOE-NEUP under Contract no. DE-AC07-05ID14517-00088120 . Partial support by US Army Research Office – Materials Science Division is also acknowledged under Contract no. W911NF-09-1-0223 . We also thank Prof. P.S. Follansbee for his helpful comments. ",

year = "2014",

month = mar,

day = "12",

doi = "10.1016/j.msea.2014.01.003",

language = "English",

volume = "597",

pages = "415--421",

journal = "Materials Science and Engineering: A",

issn = "0921-5093",

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TY - JOUR

T1 - Temperature and grain size dependent plastic instability and strain rate sensitivity of ultrafine grained austenitic Fe-14Cr-16Ni alloy

AU - Sun, C.

AU - Ma, J.

AU - Yang, Y.

AU - Hartwig, K. T.

AU - Maloy, S. A.

AU - Wang, H.

AU - Zhang, X.

N1 - Funding Information: We acknowledge financial support by DOE-NEUP under Contract no. DE-AC07-05ID14517-00088120 . Partial support by US Army Research Office – Materials Science Division is also acknowledged under Contract no. W911NF-09-1-0223 . We also thank Prof. P.S. Follansbee for his helpful comments.

PY - 2014/3/12

Y1 - 2014/3/12

N2 - In this study temperature and grain size dependent plastic instability and strain rate sensitivity (SRS) were investigated for coarse grained (CG) and ultrafine grained (UFG) austenitic Fe-14Cr-16Ni alloys. As tensile testing temperature increased from 20 to 200. °C, UFG alloys exhibited much more prominent decrease of uniform strain compared with CG counterparts. Transmission electron microscopy (TEM) analysis of deformed UFG alloys revealed temperature dependent evolution of microstructures. Through grain refinement, the SRS of Fe-14Cr-16Ni alloy increased and activation volume decreased, which may be related to the interactions of dislocations with grain boundaries. The SRS of UFG alloys exhibited greater temperature dependence than CG alloys.

AB - In this study temperature and grain size dependent plastic instability and strain rate sensitivity (SRS) were investigated for coarse grained (CG) and ultrafine grained (UFG) austenitic Fe-14Cr-16Ni alloys. As tensile testing temperature increased from 20 to 200. °C, UFG alloys exhibited much more prominent decrease of uniform strain compared with CG counterparts. Transmission electron microscopy (TEM) analysis of deformed UFG alloys revealed temperature dependent evolution of microstructures. Through grain refinement, the SRS of Fe-14Cr-16Ni alloy increased and activation volume decreased, which may be related to the interactions of dislocations with grain boundaries. The SRS of UFG alloys exhibited greater temperature dependence than CG alloys.

KW - Austenitic Fe-Cr-Ni alloy

KW - Plastic instability

KW - Strain rate sensitivity

KW - Temperature

KW - Ultrafine grain

UR - https://www.scopus.com/pages/publications/84893134312

U2 - 10.1016/j.msea.2014.01.003

DO - 10.1016/j.msea.2014.01.003

M3 - Article

AN - SCOPUS:84893134312

SN - 0921-5093

VL - 597

SP - 415

EP - 421

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

ER -

Temperature and grain size dependent plastic instability and strain rate sensitivity of ultrafine grained austenitic Fe-14Cr-16Ni alloy

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Keywords

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