Analysis of stray grain formation in single-crystal nickel-based superalloy welds

J. M. Vitek, S. S. Babu, J. W. Park, S. A. David

Research output: Contribution to conferencePaper

14 Citations (Scopus)

Abstract

The formation of stray grains during weld solidification of Rene N5, a single-crystal nickel-based superalloy, was studied. Experimental laser and electron-beam welds showed the extent of stray grain formation was sensitive to the welding conditions. It was also found that cracking is associated with the presence of stray grains, and cracks follow along the stray-grain high angle boundaries. Modeling was carried out to investigate the mechanism of stray grain formation and to predict the extent of stray grains as a function of welding conditions and location within the weld. The effect of crystallographic orientation was also taken into account. It was found that the mechanism of constitutional supercooling for stray grain formation explained all of the experimental results. Modeling based on this mechanism indicated that welding conditions would have a very important influence on the extent of stray grain formation while crystallographic orientation had only a minor influence.

Original languageEnglish
Pages459-465
Number of pages7
Publication statusPublished - 2004 Dec 1
EventSUPERALLOYS 2004 - Tenth International Symposium on Superalloys - Champion, PA, United States
Duration: 2004 Sep 192004 Sep 23

Other

OtherSUPERALLOYS 2004 - Tenth International Symposium on Superalloys
CountryUnited States
CityChampion, PA
Period04/9/1904/9/23

Fingerprint

Nickel
Superalloys
Welds
Single crystals
Welding
Supercooling
Laser beams
Solidification
Electron beams
Cracks

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Vitek, J. M., Babu, S. S., Park, J. W., & David, S. A. (2004). Analysis of stray grain formation in single-crystal nickel-based superalloy welds. 459-465. Paper presented at SUPERALLOYS 2004 - Tenth International Symposium on Superalloys, Champion, PA, United States.
Vitek, J. M. ; Babu, S. S. ; Park, J. W. ; David, S. A. / Analysis of stray grain formation in single-crystal nickel-based superalloy welds. Paper presented at SUPERALLOYS 2004 - Tenth International Symposium on Superalloys, Champion, PA, United States.7 p.
@conference{a6be775116b844e3b9e8a5c97899c940,
title = "Analysis of stray grain formation in single-crystal nickel-based superalloy welds",
abstract = "The formation of stray grains during weld solidification of Rene N5, a single-crystal nickel-based superalloy, was studied. Experimental laser and electron-beam welds showed the extent of stray grain formation was sensitive to the welding conditions. It was also found that cracking is associated with the presence of stray grains, and cracks follow along the stray-grain high angle boundaries. Modeling was carried out to investigate the mechanism of stray grain formation and to predict the extent of stray grains as a function of welding conditions and location within the weld. The effect of crystallographic orientation was also taken into account. It was found that the mechanism of constitutional supercooling for stray grain formation explained all of the experimental results. Modeling based on this mechanism indicated that welding conditions would have a very important influence on the extent of stray grain formation while crystallographic orientation had only a minor influence.",
author = "Vitek, {J. M.} and Babu, {S. S.} and Park, {J. W.} and David, {S. A.}",
year = "2004",
month = "12",
day = "1",
language = "English",
pages = "459--465",
note = "SUPERALLOYS 2004 - Tenth International Symposium on Superalloys ; Conference date: 19-09-2004 Through 23-09-2004",

}

Vitek, JM, Babu, SS, Park, JW & David, SA 2004, 'Analysis of stray grain formation in single-crystal nickel-based superalloy welds', Paper presented at SUPERALLOYS 2004 - Tenth International Symposium on Superalloys, Champion, PA, United States, 04/9/19 - 04/9/23 pp. 459-465.

Analysis of stray grain formation in single-crystal nickel-based superalloy welds. / Vitek, J. M.; Babu, S. S.; Park, J. W.; David, S. A.

2004. 459-465 Paper presented at SUPERALLOYS 2004 - Tenth International Symposium on Superalloys, Champion, PA, United States.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Analysis of stray grain formation in single-crystal nickel-based superalloy welds

AU - Vitek, J. M.

AU - Babu, S. S.

AU - Park, J. W.

AU - David, S. A.

PY - 2004/12/1

Y1 - 2004/12/1

N2 - The formation of stray grains during weld solidification of Rene N5, a single-crystal nickel-based superalloy, was studied. Experimental laser and electron-beam welds showed the extent of stray grain formation was sensitive to the welding conditions. It was also found that cracking is associated with the presence of stray grains, and cracks follow along the stray-grain high angle boundaries. Modeling was carried out to investigate the mechanism of stray grain formation and to predict the extent of stray grains as a function of welding conditions and location within the weld. The effect of crystallographic orientation was also taken into account. It was found that the mechanism of constitutional supercooling for stray grain formation explained all of the experimental results. Modeling based on this mechanism indicated that welding conditions would have a very important influence on the extent of stray grain formation while crystallographic orientation had only a minor influence.

AB - The formation of stray grains during weld solidification of Rene N5, a single-crystal nickel-based superalloy, was studied. Experimental laser and electron-beam welds showed the extent of stray grain formation was sensitive to the welding conditions. It was also found that cracking is associated with the presence of stray grains, and cracks follow along the stray-grain high angle boundaries. Modeling was carried out to investigate the mechanism of stray grain formation and to predict the extent of stray grains as a function of welding conditions and location within the weld. The effect of crystallographic orientation was also taken into account. It was found that the mechanism of constitutional supercooling for stray grain formation explained all of the experimental results. Modeling based on this mechanism indicated that welding conditions would have a very important influence on the extent of stray grain formation while crystallographic orientation had only a minor influence.

UR - http://www.scopus.com/inward/record.url?scp=23644452473&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=23644452473&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:23644452473

SP - 459

EP - 465

ER -

Vitek JM, Babu SS, Park JW, David SA. Analysis of stray grain formation in single-crystal nickel-based superalloy welds. 2004. Paper presented at SUPERALLOYS 2004 - Tenth International Symposium on Superalloys, Champion, PA, United States.