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Title of Journal: Metall and Mat Trans A

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Abbravation: Metallurgical and Materials Transactions A

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Springer US

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10.1016/0388-0001(96)00019-8

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1543-1940

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The Effect of Dilution on Microsegregation in AWS

Authors: Émerson Mendonça Miná Yuri Cruz da Silva Jean Dille Cleiton Carvalho Silva
Publish Date: 2016/10/06
Volume: 47, Issue: 12, Pages: 6138-6147
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Abstract

Dilution and microsegregation are phenomena inherent to claddings which in turn directly affect their main properties This study evaluated microsegregation in the fusion zone with different dilution levels The overlays were welded by the TIG cold wire feed process Dilution was calculated from the geometric characteristics of the claddings and from the conservation of mass equation using chemical composition measurements Microsegregation was calculated using energy dispersive Xray spectroscopy measurements of the dendrites and the chemical composition of the fusion zone The dilution of the claddings was increased by reducing the wire feed rate Fe showed potential to be incorporated into the solid phase k  1 and this increased with the increase of dilution Mo in turn was segregated into the liquid phase k  1 and also increased with the increase of dilution However Cr and W showed a slight decrease in their partition coefficients k with the increase of dilution

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