Grain Growth in the Heat-Affected Zone of Ti-6Al-4V Welds: Measurements and Three Dimensional Monte Carlo Simulation

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

The grain size distribution in the heat affected zone (HAZ) of Gas Tungsten Arc (GTA) welded Ti-6Al-4V alloy was measured for various welding conditions. The evolution of grain structure was also calculated using a three dimensional (3D) Monte Carlo (MC) model utilizing thermal cycles computed from a well tested numerical heat transfer and fluid flow model. The computed fusion zone geometry and grain size distribution agreed well with the corresponding experimental results for various heat inputs in the range of 0.55 to 4.33 MJ/m. Both the experimental data and the calculated results showed that the average prior β grain size near the fusion plane was about four to twelve times larger than the grain size in the base plate, depending on the heat input. The extent of grain growth was strongly influenced by the heat input. At locations equidistant from the fusion plane, the grains were larger in the central vertical plane as compared to those at the top surface. This size difference originates from the local variations of thermal cycles and indicates that the results from two dimensional (2D) grain growth calculations in the weld HAZ need to be reexamined. The number of edges of grains was proportional to the average grain size for the particular edge class. Both the experimental data and the calculated results indicated that for roughly identical welding conditions, the grains in the HAZ of the Ti-6Al-4V alloy were significantly smaller than those in the commercially pure titanium.

Original languageEnglish (US)
Pages197-202
Number of pages6
StatePublished - Dec 1 2002
EventTrends in Welding Research: Proceedings of the 6th International Conference - Phoenix, AZ, United States
Duration: Apr 15 2002Apr 19 2002

Other

OtherTrends in Welding Research: Proceedings of the 6th International Conference
CountryUnited States
CityPhoenix, AZ
Period4/15/024/19/02

Fingerprint

Heat affected zone
Grain growth
Welds
Fusion reactions
Welding
Tungsten
Crystal microstructure
Titanium
Flow of fluids
Gases
Hot Temperature
Monte Carlo simulation
Heat transfer
Geometry
titanium alloy (TiAl6V4)

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanical Engineering

Cite this

Mishra, S., & Debroy, T. (2002). Grain Growth in the Heat-Affected Zone of Ti-6Al-4V Welds: Measurements and Three Dimensional Monte Carlo Simulation. 197-202. Paper presented at Trends in Welding Research: Proceedings of the 6th International Conference, Phoenix, AZ, United States.
Mishra, S. ; Debroy, Tarasankar. / Grain Growth in the Heat-Affected Zone of Ti-6Al-4V Welds : Measurements and Three Dimensional Monte Carlo Simulation. Paper presented at Trends in Welding Research: Proceedings of the 6th International Conference, Phoenix, AZ, United States.6 p.
@conference{ae9b0f40749d4221832db8dbcbbb31d8,
title = "Grain Growth in the Heat-Affected Zone of Ti-6Al-4V Welds: Measurements and Three Dimensional Monte Carlo Simulation",
abstract = "The grain size distribution in the heat affected zone (HAZ) of Gas Tungsten Arc (GTA) welded Ti-6Al-4V alloy was measured for various welding conditions. The evolution of grain structure was also calculated using a three dimensional (3D) Monte Carlo (MC) model utilizing thermal cycles computed from a well tested numerical heat transfer and fluid flow model. The computed fusion zone geometry and grain size distribution agreed well with the corresponding experimental results for various heat inputs in the range of 0.55 to 4.33 MJ/m. Both the experimental data and the calculated results showed that the average prior β grain size near the fusion plane was about four to twelve times larger than the grain size in the base plate, depending on the heat input. The extent of grain growth was strongly influenced by the heat input. At locations equidistant from the fusion plane, the grains were larger in the central vertical plane as compared to those at the top surface. This size difference originates from the local variations of thermal cycles and indicates that the results from two dimensional (2D) grain growth calculations in the weld HAZ need to be reexamined. The number of edges of grains was proportional to the average grain size for the particular edge class. Both the experimental data and the calculated results indicated that for roughly identical welding conditions, the grains in the HAZ of the Ti-6Al-4V alloy were significantly smaller than those in the commercially pure titanium.",
author = "S. Mishra and Tarasankar Debroy",
year = "2002",
month = "12",
day = "1",
language = "English (US)",
pages = "197--202",
note = "Trends in Welding Research: Proceedings of the 6th International Conference ; Conference date: 15-04-2002 Through 19-04-2002",

}

Mishra, S & Debroy, T 2002, 'Grain Growth in the Heat-Affected Zone of Ti-6Al-4V Welds: Measurements and Three Dimensional Monte Carlo Simulation', Paper presented at Trends in Welding Research: Proceedings of the 6th International Conference, Phoenix, AZ, United States, 4/15/02 - 4/19/02 pp. 197-202.

Grain Growth in the Heat-Affected Zone of Ti-6Al-4V Welds : Measurements and Three Dimensional Monte Carlo Simulation. / Mishra, S.; Debroy, Tarasankar.

2002. 197-202 Paper presented at Trends in Welding Research: Proceedings of the 6th International Conference, Phoenix, AZ, United States.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Grain Growth in the Heat-Affected Zone of Ti-6Al-4V Welds

T2 - Measurements and Three Dimensional Monte Carlo Simulation

AU - Mishra, S.

AU - Debroy, Tarasankar

PY - 2002/12/1

Y1 - 2002/12/1

N2 - The grain size distribution in the heat affected zone (HAZ) of Gas Tungsten Arc (GTA) welded Ti-6Al-4V alloy was measured for various welding conditions. The evolution of grain structure was also calculated using a three dimensional (3D) Monte Carlo (MC) model utilizing thermal cycles computed from a well tested numerical heat transfer and fluid flow model. The computed fusion zone geometry and grain size distribution agreed well with the corresponding experimental results for various heat inputs in the range of 0.55 to 4.33 MJ/m. Both the experimental data and the calculated results showed that the average prior β grain size near the fusion plane was about four to twelve times larger than the grain size in the base plate, depending on the heat input. The extent of grain growth was strongly influenced by the heat input. At locations equidistant from the fusion plane, the grains were larger in the central vertical plane as compared to those at the top surface. This size difference originates from the local variations of thermal cycles and indicates that the results from two dimensional (2D) grain growth calculations in the weld HAZ need to be reexamined. The number of edges of grains was proportional to the average grain size for the particular edge class. Both the experimental data and the calculated results indicated that for roughly identical welding conditions, the grains in the HAZ of the Ti-6Al-4V alloy were significantly smaller than those in the commercially pure titanium.

AB - The grain size distribution in the heat affected zone (HAZ) of Gas Tungsten Arc (GTA) welded Ti-6Al-4V alloy was measured for various welding conditions. The evolution of grain structure was also calculated using a three dimensional (3D) Monte Carlo (MC) model utilizing thermal cycles computed from a well tested numerical heat transfer and fluid flow model. The computed fusion zone geometry and grain size distribution agreed well with the corresponding experimental results for various heat inputs in the range of 0.55 to 4.33 MJ/m. Both the experimental data and the calculated results showed that the average prior β grain size near the fusion plane was about four to twelve times larger than the grain size in the base plate, depending on the heat input. The extent of grain growth was strongly influenced by the heat input. At locations equidistant from the fusion plane, the grains were larger in the central vertical plane as compared to those at the top surface. This size difference originates from the local variations of thermal cycles and indicates that the results from two dimensional (2D) grain growth calculations in the weld HAZ need to be reexamined. The number of edges of grains was proportional to the average grain size for the particular edge class. Both the experimental data and the calculated results indicated that for roughly identical welding conditions, the grains in the HAZ of the Ti-6Al-4V alloy were significantly smaller than those in the commercially pure titanium.

UR - http://www.scopus.com/inward/record.url?scp=1442331125&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=1442331125&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:1442331125

SP - 197

EP - 202

ER -

Mishra S, Debroy T. Grain Growth in the Heat-Affected Zone of Ti-6Al-4V Welds: Measurements and Three Dimensional Monte Carlo Simulation. 2002. Paper presented at Trends in Welding Research: Proceedings of the 6th International Conference, Phoenix, AZ, United States.