Effect of low-temperature phase transition o nmechanical behavior of Fe-CU alloys

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Effect of low-temperature phase transition o nmechanical behavior of Fe-CU alloys. / Minov, Boris; Terentyev, Dmitry; Van Renterghem, Wouter; Osetsky, Yuri; Konstantinovic, Milan; Bonny, Giovanni (Peer reviewer).

In: Materials Science and Engineering: A, Vol. 597, 12.03.2014, p. 46-51.

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@article{4f55c8746c1b4a0eb39ee2ccb7f323fe,
title = "Effect of low-temperature phase transition o nmechanical behavior of Fe-CU alloys",
abstract = "Mechanical tests of thermally aged Fe–Cu alloys were performed in the temperature range between 97K and 297K in order to investigate their low-temperature mechanical behavior.Tests performed below 122K have shown that the material breaks in a random fashion already in the elastic region, while above it a clearly pronounced yield pointis observed. This sudden change of the mechanical behavior has been rationalized on the basis of atomistic simulations, addressing the interaction of dislocations with Cu precipitates. The latter study has revealed the presence of bcc to fcc transition induced by dislocations which is a temperature dependent process. It is suppressed with increasing temperature and enhanced with increasing a precipitate size. This transition, efficient at low temperature, leads to the transformation of Cu precipitates into non-coherent particles, which act as stronger obstacles and cause the experimentally observed premature failure. The presence of small non-coherent Cu-precipitates, expected to form according to atomistic predictions, and not observed prior to deformation, was confirmed by means of transmission electron microscopy.",
keywords = "Cu-precipitates, Dislocations, Transformation, Mechanical properties",
author = "Boris Minov and Dmitry Terentyev and {Van Renterghem}, Wouter and Yuri Osetsky and Milan Konstantinovic and Giovanni Bonny",
note = "Score = 10",
year = "2014",
month = "3",
day = "12",
doi = "10.1016/j.msea.2013.12.071",
language = "English",
volume = "597",
pages = "46--51",
journal = "Materials Science and Engineering: A",
issn = "0921-5093",
publisher = "Elsevier",

}

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TY - JOUR

T1 - Effect of low-temperature phase transition o nmechanical behavior of Fe-CU alloys

AU - Minov, Boris

AU - Terentyev, Dmitry

AU - Van Renterghem, Wouter

AU - Osetsky, Yuri

AU - Konstantinovic, Milan

A2 - Bonny, Giovanni

N1 - Score = 10

PY - 2014/3/12

Y1 - 2014/3/12

N2 - Mechanical tests of thermally aged Fe–Cu alloys were performed in the temperature range between 97K and 297K in order to investigate their low-temperature mechanical behavior.Tests performed below 122K have shown that the material breaks in a random fashion already in the elastic region, while above it a clearly pronounced yield pointis observed. This sudden change of the mechanical behavior has been rationalized on the basis of atomistic simulations, addressing the interaction of dislocations with Cu precipitates. The latter study has revealed the presence of bcc to fcc transition induced by dislocations which is a temperature dependent process. It is suppressed with increasing temperature and enhanced with increasing a precipitate size. This transition, efficient at low temperature, leads to the transformation of Cu precipitates into non-coherent particles, which act as stronger obstacles and cause the experimentally observed premature failure. The presence of small non-coherent Cu-precipitates, expected to form according to atomistic predictions, and not observed prior to deformation, was confirmed by means of transmission electron microscopy.

AB - Mechanical tests of thermally aged Fe–Cu alloys were performed in the temperature range between 97K and 297K in order to investigate their low-temperature mechanical behavior.Tests performed below 122K have shown that the material breaks in a random fashion already in the elastic region, while above it a clearly pronounced yield pointis observed. This sudden change of the mechanical behavior has been rationalized on the basis of atomistic simulations, addressing the interaction of dislocations with Cu precipitates. The latter study has revealed the presence of bcc to fcc transition induced by dislocations which is a temperature dependent process. It is suppressed with increasing temperature and enhanced with increasing a precipitate size. This transition, efficient at low temperature, leads to the transformation of Cu precipitates into non-coherent particles, which act as stronger obstacles and cause the experimentally observed premature failure. The presence of small non-coherent Cu-precipitates, expected to form according to atomistic predictions, and not observed prior to deformation, was confirmed by means of transmission electron microscopy.

KW - Cu-precipitates

KW - Dislocations

KW - Transformation

KW - Mechanical properties

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_136487

UR - http://knowledgecentre.sckcen.be/so2/bibref/11731

U2 - 10.1016/j.msea.2013.12.071

DO - 10.1016/j.msea.2013.12.071

M3 - Article

VL - 597

SP - 46

EP - 51

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

SN - 0921-5093

ER -

ID: 88611