Effects of alloying elements on the temperature dependence of yield stress in Ll2-Co3(Al,W)

Zhenghao M.T. Chin; Norihiko L. Okamoto; Haruyuki Inui

doi:10.1557/opl.2015.161

Effects of alloying elements on the temperature dependence of yield stress in Ll₂-Co₃(Al,W)

Zhenghao M.T. Chin, Norihiko L. Okamoto, Haruyuki Inui

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

The effects of alloying elements (Ni/Ta) on the temperature dependence of yield stress in Co₃(Al,W) with the Ll₂ structure have been investigated through compression tests of nearly single-phase polycrystalline alloys in the temperature range between room temperature to 1, 473K. Compared with a ternary Co₃(Al,W), a Ni/Ta-added Co₃(Al,W) alloy exhibits a higher γ' solvus temperature and lower onset temperature of the yield stress anomaly (positive temperature dependence of yield stress), suggesting that the CSF energy is increased by Ni/Ta addition. As a consequence, the high-temperature strength in Co₃(Al,W) is considerably enhanced.

Original language	English
Title of host publication	Advanced Structural and Functional Intermetallic-Based Alloys
Editors	I. Baker, M. Heilmaier, K. Kishida, M. Mills, S. Miura
Publisher	Materials Research Society
Pages	25-30
Number of pages	6
ISBN (Electronic)	9781510806344
DOIs	https://doi.org/10.1557/opl.2015.161
Publication status	Published - 2015
Externally published	Yes
Event	2014 MRS Fall Meeting - Boston, United States Duration: 2014 Nov 30 → 2014 Dec 5

Publication series

Name	Materials Research Society Symposium Proceedings
Volume	1760
ISSN (Print)	0272-9172

Other

Other	2014 MRS Fall Meeting
Country/Territory	United States
City	Boston
Period	14/11/30 → 14/12/5

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1557/opl.2015.161

Cite this

Chin, Z. M. T., Okamoto, N. L., & Inui, H. (2015). Effects of alloying elements on the temperature dependence of yield stress in Ll₂-Co₃(Al,W). In I. Baker, M. Heilmaier, K. Kishida, M. Mills, & S. Miura (Eds.), Advanced Structural and Functional Intermetallic-Based Alloys (pp. 25-30). (Materials Research Society Symposium Proceedings; Vol. 1760). Materials Research Society. https://doi.org/10.1557/opl.2015.161

Effects of alloying elements on the temperature dependence of yield stress in Ll₂-Co₃(Al,W). / Chin, Zhenghao M.T.; Okamoto, Norihiko L.; Inui, Haruyuki.

Advanced Structural and Functional Intermetallic-Based Alloys. ed. / I. Baker; M. Heilmaier; K. Kishida; M. Mills; S. Miura. Materials Research Society, 2015. p. 25-30 (Materials Research Society Symposium Proceedings; Vol. 1760).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Chin, ZMT, Okamoto, NL & Inui, H 2015, Effects of alloying elements on the temperature dependence of yield stress in Ll₂-Co₃(Al,W). in I Baker, M Heilmaier, K Kishida, M Mills & S Miura (eds), Advanced Structural and Functional Intermetallic-Based Alloys. Materials Research Society Symposium Proceedings, vol. 1760, Materials Research Society, pp. 25-30, 2014 MRS Fall Meeting, Boston, United States, 14/11/30. https://doi.org/10.1557/opl.2015.161

Chin ZMT, Okamoto NL, Inui H. Effects of alloying elements on the temperature dependence of yield stress in Ll₂-Co₃(Al,W). In Baker I, Heilmaier M, Kishida K, Mills M, Miura S, editors, Advanced Structural and Functional Intermetallic-Based Alloys. Materials Research Society. 2015. p. 25-30. (Materials Research Society Symposium Proceedings). doi: 10.1557/opl.2015.161

Chin, Zhenghao M.T. ; Okamoto, Norihiko L. ; Inui, Haruyuki. / Effects of alloying elements on the temperature dependence of yield stress in Ll₂-Co₃(Al,W). Advanced Structural and Functional Intermetallic-Based Alloys. editor / I. Baker ; M. Heilmaier ; K. Kishida ; M. Mills ; S. Miura. Materials Research Society, 2015. pp. 25-30 (Materials Research Society Symposium Proceedings).

@inproceedings{60fe9d46e0c440d0b5df7a698b38dee4,

title = "Effects of alloying elements on the temperature dependence of yield stress in Ll2-Co3(Al,W)",

abstract = "The effects of alloying elements (Ni/Ta) on the temperature dependence of yield stress in Co3(Al,W) with the Ll2 structure have been investigated through compression tests of nearly single-phase polycrystalline alloys in the temperature range between room temperature to 1, 473K. Compared with a ternary Co3(Al,W), a Ni/Ta-added Co3(Al,W) alloy exhibits a higher γ' solvus temperature and lower onset temperature of the yield stress anomaly (positive temperature dependence of yield stress), suggesting that the CSF energy is increased by Ni/Ta addition. As a consequence, the high-temperature strength in Co3(Al,W) is considerably enhanced.",

author = "Chin, {Zhenghao M.T.} and Okamoto, {Norihiko L.} and Haruyuki Inui",

note = "Publisher Copyright: {\textcopyright} 2015 Materials Research Society. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.; 2014 MRS Fall Meeting ; Conference date: 30-11-2014 Through 05-12-2014",

year = "2015",

doi = "10.1557/opl.2015.161",

language = "English",

series = "Materials Research Society Symposium Proceedings",

publisher = "Materials Research Society",

pages = "25--30",

editor = "I. Baker and M. Heilmaier and K. Kishida and M. Mills and S. Miura",

booktitle = "Advanced Structural and Functional Intermetallic-Based Alloys",

}

TY - GEN

T1 - Effects of alloying elements on the temperature dependence of yield stress in Ll2-Co3(Al,W)

AU - Chin, Zhenghao M.T.

AU - Okamoto, Norihiko L.

AU - Inui, Haruyuki

PY - 2015

Y1 - 2015

N2 - The effects of alloying elements (Ni/Ta) on the temperature dependence of yield stress in Co3(Al,W) with the Ll2 structure have been investigated through compression tests of nearly single-phase polycrystalline alloys in the temperature range between room temperature to 1, 473K. Compared with a ternary Co3(Al,W), a Ni/Ta-added Co3(Al,W) alloy exhibits a higher γ' solvus temperature and lower onset temperature of the yield stress anomaly (positive temperature dependence of yield stress), suggesting that the CSF energy is increased by Ni/Ta addition. As a consequence, the high-temperature strength in Co3(Al,W) is considerably enhanced.

AB - The effects of alloying elements (Ni/Ta) on the temperature dependence of yield stress in Co3(Al,W) with the Ll2 structure have been investigated through compression tests of nearly single-phase polycrystalline alloys in the temperature range between room temperature to 1, 473K. Compared with a ternary Co3(Al,W), a Ni/Ta-added Co3(Al,W) alloy exhibits a higher γ' solvus temperature and lower onset temperature of the yield stress anomaly (positive temperature dependence of yield stress), suggesting that the CSF energy is increased by Ni/Ta addition. As a consequence, the high-temperature strength in Co3(Al,W) is considerably enhanced.

UR - http://www.scopus.com/inward/record.url?scp=84938917568&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84938917568&partnerID=8YFLogxK

U2 - 10.1557/opl.2015.161

DO - 10.1557/opl.2015.161

M3 - Conference contribution

AN - SCOPUS:84938917568

T3 - Materials Research Society Symposium Proceedings

SP - 25

EP - 30

BT - Advanced Structural and Functional Intermetallic-Based Alloys

A2 - Baker, I.

A2 - Heilmaier, M.

A2 - Kishida, K.

A2 - Mills, M.

A2 - Miura, S.

PB - Materials Research Society

T2 - 2014 MRS Fall Meeting

Y2 - 30 November 2014 through 5 December 2014

ER -