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Title: Fusion Welding of AerMet 100 Alloy

Abstract

A database of mechanical properties for weldment fusion and heat-affected zones was established for AerMet{reg_sign}100 alloy, and a study of the welding metallurgy of the alloy was conducted. The properties database was developed for a matrix of weld processes (electron beam and gas-tungsten arc) welding parameters (heat inputs) and post-weld heat treatment (PWHT) conditions. In order to insure commercial utility and acceptance, the matrix was commensurate with commercial welding technology and practice. Second, the mechanical properties were correlated with fundamental understanding of microstructure and microstructural evolution in this alloy. Finally, assessments of optimal weld process/PWHT combinations for cotildent application of the alloy in probable service conditions were made. The database of weldment mechanical properties demonstrated that a wide range of properties can be obtained in welds in this alloy. In addition, it was demonstrated that acceptable welds, some with near base metal properties, could be produced from several different initial heat treatments. This capability provides a means for defining process parameters and PWHT's to achieve appropriate properties for different applications, and provides useful flexibility in design and manufacturing. The database also indicated that an important region in welds is the softened region which develops in the heat-affected zone (HAZ) andmore » analysis within the welding metallurgy studies indicated that the development of this region is governed by a complex interaction of precipitate overaging and austenite formation. Models and experimental data were therefore developed to describe overaging and austenite formation during thermal cycling. These models and experimental data can be applied to essentially any thermal cycle, and provide a basis for predicting the evolution of microstructure and properties during thermal processing.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
12656
Report Number(s):
SAND99-1833
TRN: AH200120%%369
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALLOYS; AUSTENITE; HEAT AFFECTED ZONE; HEAT TREATMENTS; MECHANICAL PROPERTIES; MICROSTRUCTURE; THERMAL CYCLING; GAS TUNGSTEN-ARC WELDING; ELECTRON BEAM WELDING

Citation Formats

ENGLEHART, DAVID A, MICHAEL, JOSEPH R, NOVOTNY, PAUL M, and ROBINO, CHARLES V. Fusion Welding of AerMet 100 Alloy. United States: N. p., 1999. Web. doi:10.2172/12656.
ENGLEHART, DAVID A, MICHAEL, JOSEPH R, NOVOTNY, PAUL M, & ROBINO, CHARLES V. Fusion Welding of AerMet 100 Alloy. United States. https://doi.org/10.2172/12656
ENGLEHART, DAVID A, MICHAEL, JOSEPH R, NOVOTNY, PAUL M, and ROBINO, CHARLES V. 1999. "Fusion Welding of AerMet 100 Alloy". United States. https://doi.org/10.2172/12656. https://www.osti.gov/servlets/purl/12656.
@article{osti_12656,
title = {Fusion Welding of AerMet 100 Alloy},
author = {ENGLEHART, DAVID A and MICHAEL, JOSEPH R and NOVOTNY, PAUL M and ROBINO, CHARLES V},
abstractNote = {A database of mechanical properties for weldment fusion and heat-affected zones was established for AerMet{reg_sign}100 alloy, and a study of the welding metallurgy of the alloy was conducted. The properties database was developed for a matrix of weld processes (electron beam and gas-tungsten arc) welding parameters (heat inputs) and post-weld heat treatment (PWHT) conditions. In order to insure commercial utility and acceptance, the matrix was commensurate with commercial welding technology and practice. Second, the mechanical properties were correlated with fundamental understanding of microstructure and microstructural evolution in this alloy. Finally, assessments of optimal weld process/PWHT combinations for cotildent application of the alloy in probable service conditions were made. The database of weldment mechanical properties demonstrated that a wide range of properties can be obtained in welds in this alloy. In addition, it was demonstrated that acceptable welds, some with near base metal properties, could be produced from several different initial heat treatments. This capability provides a means for defining process parameters and PWHT's to achieve appropriate properties for different applications, and provides useful flexibility in design and manufacturing. The database also indicated that an important region in welds is the softened region which develops in the heat-affected zone (HAZ) and analysis within the welding metallurgy studies indicated that the development of this region is governed by a complex interaction of precipitate overaging and austenite formation. Models and experimental data were therefore developed to describe overaging and austenite formation during thermal cycling. These models and experimental data can be applied to essentially any thermal cycle, and provide a basis for predicting the evolution of microstructure and properties during thermal processing.},
doi = {10.2172/12656},
url = {https://www.osti.gov/biblio/12656}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {8}
}