Deformation mechanisms of FeCoCrNiMo0.2 high entropy alloy at 77 and 15 K

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Deformation mechanisms of FeCoCrNiMo0.2 high entropy alloy at 77 and 15 K. / Tang, Lei; Cai, Biao; Attallah, Moataz.

In: Scripta Materialia, Vol. 178, 15.03.2020, p. 166-170.

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@article{b12c60c32948478798b21e6662d41f96,
title = "Deformation mechanisms of FeCoCrNiMo0.2 high entropy alloy at 77 and 15 K",
abstract = "Deformation mechanisms of high entropy alloys (HEAs) at cryogenic temperatures have attracted extensive research interest. We used in situ neutron diffraction to study the tensile behavior of a face-centered-cubic HEA at 77 and 15 K and compared its stacking fault energy (SFE) at ambient and cryogenic temperatures. The SFE dropped from 28 mJm-2 at 293 K to 11 mJm-2 at 15 K, leading to the transition of deformation mechanism from deformation-induced twinning to martensite phase transformation. As a result, excellent balance of strength and ductility was achieved at both temperatures. This finding highlights the importanceof SFE for cryogenic alloy design. ",
keywords = "high entropy alloy, cryogenic deformation, neutron diffraction",
author = "Lei Tang and Biao Cai and Moataz Attallah",
year = "2020",
month = mar,
day = "15",
doi = "10.1016/j.scriptamat.2019.11.026",
language = "English",
volume = "178",
pages = "166--170",
journal = "Scripta Materialia",
issn = "1359-6462",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Deformation mechanisms of FeCoCrNiMo0.2 high entropy alloy at 77 and 15 K

AU - Tang, Lei

AU - Cai, Biao

AU - Attallah, Moataz

PY - 2020/3/15

Y1 - 2020/3/15

N2 - Deformation mechanisms of high entropy alloys (HEAs) at cryogenic temperatures have attracted extensive research interest. We used in situ neutron diffraction to study the tensile behavior of a face-centered-cubic HEA at 77 and 15 K and compared its stacking fault energy (SFE) at ambient and cryogenic temperatures. The SFE dropped from 28 mJm-2 at 293 K to 11 mJm-2 at 15 K, leading to the transition of deformation mechanism from deformation-induced twinning to martensite phase transformation. As a result, excellent balance of strength and ductility was achieved at both temperatures. This finding highlights the importanceof SFE for cryogenic alloy design.

AB - Deformation mechanisms of high entropy alloys (HEAs) at cryogenic temperatures have attracted extensive research interest. We used in situ neutron diffraction to study the tensile behavior of a face-centered-cubic HEA at 77 and 15 K and compared its stacking fault energy (SFE) at ambient and cryogenic temperatures. The SFE dropped from 28 mJm-2 at 293 K to 11 mJm-2 at 15 K, leading to the transition of deformation mechanism from deformation-induced twinning to martensite phase transformation. As a result, excellent balance of strength and ductility was achieved at both temperatures. This finding highlights the importanceof SFE for cryogenic alloy design.

KW - high entropy alloy

KW - cryogenic deformation

KW - neutron diffraction

UR - http://www.scopus.com/inward/record.url?scp=85075059868&partnerID=8YFLogxK

U2 - 10.1016/j.scriptamat.2019.11.026

DO - 10.1016/j.scriptamat.2019.11.026

M3 - Article

VL - 178

SP - 166

EP - 170

JO - Scripta Materialia

JF - Scripta Materialia

SN - 1359-6462

ER -