Grain growth on reheating for an as-cast Al-Nb-containing steel with segregated composition

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Grain growth on reheating for an as-cast Al-Nb-containing steel with segregated composition. / Wang, Fei; Davis, Claire; Strangwood, Martin.

In: Materials Science and Technology (United Kingdom), Vol. 35, No. 5, 24.03.2019, p. 615-627.

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@article{8f9b5fef70e145e1a4c1064fed3ec60f,
title = "Grain growth on reheating for an as-cast Al-Nb-containing steel with segregated composition",
abstract = "Reheating treatments for as-cast Al-Nb-containing steel were examined at temperatures correlating to the predicted dissolution temperatures of the precipitates present in the interdendritic and dendritic regions. Bimodal grain growth was observed in this steel when reheated in the range 1160–1200°C as Nb-rich particles remaining in the interdendritic region prevented further growth of grains originating from the dendritic region when the pinning precipitates of AlN dissolved. The isolated abnormally large grain structure seen for the homogenised condition from previous work was not observed in the as-cast Al-Nb steel under any conditions. It is suggested that elemental segregation (particularly for Nb) plays a role in providing a spatially distributed (banded) pinning effect on the large grains growing from the dendritic regions.",
keywords = "abnormal grain growth, As-cast steel, bimodal grain growth, reheating treatment, segregation",
author = "Fei Wang and Claire Davis and Martin Strangwood",
year = "2019",
month = mar,
day = "24",
doi = "10.1080/02670836.2019.1577533",
language = "English",
volume = "35",
pages = "615--627",
journal = "Materials Science and Technology",
issn = "0267-0836",
publisher = "Maney Publishing",
number = "5",

}

RIS

TY - JOUR

T1 - Grain growth on reheating for an as-cast Al-Nb-containing steel with segregated composition

AU - Wang, Fei

AU - Davis, Claire

AU - Strangwood, Martin

PY - 2019/3/24

Y1 - 2019/3/24

N2 - Reheating treatments for as-cast Al-Nb-containing steel were examined at temperatures correlating to the predicted dissolution temperatures of the precipitates present in the interdendritic and dendritic regions. Bimodal grain growth was observed in this steel when reheated in the range 1160–1200°C as Nb-rich particles remaining in the interdendritic region prevented further growth of grains originating from the dendritic region when the pinning precipitates of AlN dissolved. The isolated abnormally large grain structure seen for the homogenised condition from previous work was not observed in the as-cast Al-Nb steel under any conditions. It is suggested that elemental segregation (particularly for Nb) plays a role in providing a spatially distributed (banded) pinning effect on the large grains growing from the dendritic regions.

AB - Reheating treatments for as-cast Al-Nb-containing steel were examined at temperatures correlating to the predicted dissolution temperatures of the precipitates present in the interdendritic and dendritic regions. Bimodal grain growth was observed in this steel when reheated in the range 1160–1200°C as Nb-rich particles remaining in the interdendritic region prevented further growth of grains originating from the dendritic region when the pinning precipitates of AlN dissolved. The isolated abnormally large grain structure seen for the homogenised condition from previous work was not observed in the as-cast Al-Nb steel under any conditions. It is suggested that elemental segregation (particularly for Nb) plays a role in providing a spatially distributed (banded) pinning effect on the large grains growing from the dendritic regions.

KW - abnormal grain growth

KW - As-cast steel

KW - bimodal grain growth

KW - reheating treatment

KW - segregation

UR - http://www.scopus.com/inward/record.url?scp=85062349586&partnerID=8YFLogxK

U2 - 10.1080/02670836.2019.1577533

DO - 10.1080/02670836.2019.1577533

M3 - Article

AN - SCOPUS:85062349586

VL - 35

SP - 615

EP - 627

JO - Materials Science and Technology

JF - Materials Science and Technology

SN - 0267-0836

IS - 5

ER -