Thermomechanical response of an ultrafine-grained nickel-yttrium alloy

S. Srinivasan; C. Kale; B. C. Hornbuckle; K. A. Darling; P. Peralta; K. N. Solanki

doi:10.1016/j.scriptamat.2020.06.068

Thermomechanical response of an ultrafine-grained nickel-yttrium alloy

S. Srinivasan, C. Kale, B. C. Hornbuckle, K. A. Darling, P. Peralta, K. N. Solanki

Engineering, Ira A. Fulton Schools of (IAFSE)

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

5 Scopus citations

Abstract

Thermomechanical behavior of an ultrafine-grained nickel-yttrium alloy has been investigated through quasi-static (10⁻⁴ s⁻¹) and high temperature creep experiments under uniaxial compression along with post-deformed transmission electron microscopy (TEM) characterization. While the alloy possesses a quasi-static flow stress of ~1255 MPa at room temperature, the flow stress drops by about 80% at 873 K. TEM analysis showed negligible average grain growth over the entire temperature range tested. Furthermore, the alloy showed exceptional steady–state creep behavior owing to the relative stability of the grain size and interactions between dislocations/grain boundary and inclusions/dispersoids.

Original language	English (US)
Pages (from-to)	434-438
Number of pages	5
Journal	Scripta Materialia
Volume	187
DOIs	https://doi.org/10.1016/j.scriptamat.2020.06.068
State	Published - Oct 2020

Keywords

Creep
Grain growth
Thermo-mechanical behavior
Ultrafine-grained

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2020.06.068

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title = "Thermomechanical response of an ultrafine-grained nickel-yttrium alloy",

abstract = "Thermomechanical behavior of an ultrafine-grained nickel-yttrium alloy has been investigated through quasi-static (10−4 s−1) and high temperature creep experiments under uniaxial compression along with post-deformed transmission electron microscopy (TEM) characterization. While the alloy possesses a quasi-static flow stress of ~1255 MPa at room temperature, the flow stress drops by about 80% at 873 K. TEM analysis showed negligible average grain growth over the entire temperature range tested. Furthermore, the alloy showed exceptional steady–state creep behavior owing to the relative stability of the grain size and interactions between dislocations/grain boundary and inclusions/dispersoids.",

keywords = "Creep, Grain growth, Thermo-mechanical behavior, Ultrafine-grained",

author = "S. Srinivasan and C. Kale and Hornbuckle, {B. C.} and Darling, {K. A.} and P. Peralta and Solanki, {K. N.}",

note = "Funding Information: S.S., C.K., and K. N. S. acknowledge the use of facilities within the LeRoy Eyring Center for Solid State Science at Arizona State University. This work was supported by the US Army Research Laboratory under contract W911NF-15-2-0038 and the National Science Foundation under grants nos. 1663287 and 1810431 . Publisher Copyright: {\textcopyright} 2020 Acta Materialia Inc.",

year = "2020",

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doi = "10.1016/j.scriptamat.2020.06.068",

language = "English (US)",

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AU - Srinivasan, S.

AU - Kale, C.

AU - Hornbuckle, B. C.

AU - Darling, K. A.

AU - Peralta, P.

AU - Solanki, K. N.

N1 - Funding Information: S.S., C.K., and K. N. S. acknowledge the use of facilities within the LeRoy Eyring Center for Solid State Science at Arizona State University. This work was supported by the US Army Research Laboratory under contract W911NF-15-2-0038 and the National Science Foundation under grants nos. 1663287 and 1810431 . Publisher Copyright: © 2020 Acta Materialia Inc.

PY - 2020/10

Y1 - 2020/10

N2 - Thermomechanical behavior of an ultrafine-grained nickel-yttrium alloy has been investigated through quasi-static (10−4 s−1) and high temperature creep experiments under uniaxial compression along with post-deformed transmission electron microscopy (TEM) characterization. While the alloy possesses a quasi-static flow stress of ~1255 MPa at room temperature, the flow stress drops by about 80% at 873 K. TEM analysis showed negligible average grain growth over the entire temperature range tested. Furthermore, the alloy showed exceptional steady–state creep behavior owing to the relative stability of the grain size and interactions between dislocations/grain boundary and inclusions/dispersoids.

AB - Thermomechanical behavior of an ultrafine-grained nickel-yttrium alloy has been investigated through quasi-static (10−4 s−1) and high temperature creep experiments under uniaxial compression along with post-deformed transmission electron microscopy (TEM) characterization. While the alloy possesses a quasi-static flow stress of ~1255 MPa at room temperature, the flow stress drops by about 80% at 873 K. TEM analysis showed negligible average grain growth over the entire temperature range tested. Furthermore, the alloy showed exceptional steady–state creep behavior owing to the relative stability of the grain size and interactions between dislocations/grain boundary and inclusions/dispersoids.

KW - Creep

KW - Grain growth

KW - Thermo-mechanical behavior

KW - Ultrafine-grained

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JO - Scripta Materialia

JF - Scripta Materialia

ER -

Thermomechanical response of an ultrafine-grained nickel-yttrium alloy

Abstract

Keywords

ASJC Scopus subject areas

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