Acta Materialia

, volume 88 , pages 366-374

A criterion for cracking during solidification

Sindo Kou ¹

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Department of Materials Science and Engineering, The University of Wisconsin, Madison, WI 53706, United States |

Publication type: Journal Article

Publication date: 2015-04-01

Elsevier

Acta Materialia

scimago Q1

wos Q1

SJR: 2.972

CiteScore: 15.4

Impact factor: 9.3

ISSN: 13596454, 18732453

DOI: 10.1016/j.actamat.2015.01.034

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Metals and Alloys

Ceramics and Composites

Electronic, Optical and Magnetic Materials

Polymers and Plastics

Abstract

Cracking during solidification is a serious defect in castings and welds. When solidification shrinkage and thermal contraction of the semisolid and its surrounding solid are obstructed, tensile deformation can be induced in the semisolid to cause cracking along grain boundaries that are not fed with sufficient liquid. A criterion for cracking was derived, focusing on events occurring at the grain boundary including separation of grains from each other, lateral growth of grains toward each other, and liquid feeding between grains. An index for the susceptibility of an alloy to cracking during solidification was also proposed, that is, |dT/d(fS1/2)| near (fS)1/2 = 1, where T is temperature and fS the fraction solid in the semisolid. The index affects: (a) the lateral growth rate of two neighboring grains toward each other to bond together to resist cracking, and (b) the length of the grain-boundary liquid channel through which feeding has to occur to resist cracking. The index was verified with experimental data in casting and welding of Al alloys.

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Kou S. A criterion for cracking during solidification // Acta Materialia. 2015. Vol. 88. pp. 366-374.

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Kou S. A criterion for cracking during solidification // Acta Materialia. 2015. Vol. 88. pp. 366-374.

RIS |

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RIS Copy

TY - JOUR

DO - 10.1016/j.actamat.2015.01.034

UR - https://linkinghub.elsevier.com/retrieve/pii/S1359645415000476

TI - A criterion for cracking during solidification

T2 - Acta Materialia

AU - Kou, Sindo

PY - 2015

DA - 2015/04/01

PB - Elsevier

SP - 366-374

VL - 88

SN - 1359-6454

SN - 1873-2453

ER -

BibTex

Cite this

BibTex (up to 50 authors) Copy

@article{2015_Kou,

author = {Sindo Kou},

title = {A criterion for cracking during solidification},

journal = {Acta Materialia},

year = {2015},

volume = {88},

publisher = {Elsevier},

month = {apr},

url = {https://linkinghub.elsevier.com/retrieve/pii/S1359645415000476},

pages = {366--374},

doi = {10.1016/j.actamat.2015.01.034}

}

Publisher

Elsevier

Journal

Acta Materialia

scimago Q1

wos Q1

SJR

2.972

CiteScore

15.4

Impact factor

9.3

ISSN

13596454 (Print)

18732453

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