The Effect of Solution Annealing on the Microstructural Behavior of Alloy 22 Welds

Title: The Effect of Solution Annealing on the Microstructural Behavior of Alloy 22 Welds

Full Record
Other Related Research

Abstract

Multi-pass gas tungsten arc welds of Alloy 22 were subjected to solution annealing durations of 20 minutes, 24 hours, 72 hours and 1 week at temperatures of 1075, 1121, 1200, and 1300 C. The specimens were studied in cross section by secondary electron microscopy to determine the effect of solution annealing on tetrahedrally close packed (TCP) precipitate stability. Electron backscatter diffraction mapping was also performed on all of the specimens to determine the recrystallization behavior of the welds. It was found that complete TCP precipitate dissolution occurs after solution annealing at 1075 C and 1121 C for 24 hours, and at 1200 C and 1300 C for durations of 20 minutes. Regions of most rapid recrystallization were correlated to the regions of lowest solute content and highest residual tensile stresses. Texture analysis indicated that while the columnar dendrites originally present in the weld grew with a <001> orientation in the transverse direction (opposite the heat flow direction), the recrystallized grains adopt a <101> orientation in the transverse direction when recrystallization and TCP phase dissolution occur simultaneously.

Authors:: El-Dasher, B S; Edgecumbe, T S; Torres, S G

Publication Date:: 2005-05-06

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 881879

Report Number(s):: UCRL-JRNL-212170
TRN: US0603026

DOE Contract Number:: W-7405-ENG-48

Resource Type:: Journal Article

Journal Name:: Metallurgical and Materials Transactions A

Additional Journal Information:: Journal Volume: 37A

Country of Publication:: United States

Language:: English

Subject:: 12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 36 MATERIALS SCIENCE; ALLOYS; ANNEALING; CROSS SECTIONS; DENDRITES; DIFFRACTION; DISSOLUTION; ELECTRON MICROSCOPY; ELECTRONS; HEAT FLUX; ORIENTATION; RECRYSTALLIZATION; SOLUTES; STABILITY; STRESSES; TEXTURE; TUNGSTEN

Citation Formats


                    El-Dasher, B S, Edgecumbe, T S, and Torres, S G. The Effect of Solution Annealing on the Microstructural Behavior of Alloy 22 Welds.  United States: N. p., 2005. 
        Web.

Copy to clipboard


                    El-Dasher, B S, Edgecumbe, T S, & Torres, S G. The Effect of Solution Annealing on the Microstructural Behavior of Alloy 22 Welds.  United States.

Copy to clipboard


                    El-Dasher, B S, Edgecumbe, T S, and Torres, S G. Fri .  
        "The Effect of Solution Annealing on the Microstructural Behavior of Alloy 22 Welds".  United States.  https://www.osti.gov/servlets/purl/881879.

Copy to clipboard


                    
@article{osti_881879,

  title        = {The Effect of Solution Annealing on the Microstructural Behavior of Alloy 22 Welds},

  author       = {El-Dasher, B S and Edgecumbe, T S and Torres, S G},

  abstractNote = {Multi-pass gas tungsten arc welds of Alloy 22 were subjected to solution annealing durations of 20 minutes, 24 hours, 72 hours and 1 week at temperatures of 1075, 1121, 1200, and 1300 C. The specimens were studied in cross section by secondary electron microscopy to determine the effect of solution annealing on tetrahedrally close packed (TCP) precipitate stability. Electron backscatter diffraction mapping was also performed on all of the specimens to determine the recrystallization behavior of the welds. It was found that complete TCP precipitate dissolution occurs after solution annealing at 1075 C and 1121 C for 24 hours, and at 1200 C and 1300 C for durations of 20 minutes. Regions of most rapid recrystallization were correlated to the regions of lowest solute content and highest residual tensile stresses. Texture analysis indicated that while the columnar dendrites originally present in the weld grew with a <001> orientation in the transverse direction (opposite the heat flow direction), the recrystallized grains adopt a <101> orientation in the transverse direction when recrystallization and TCP phase dissolution occur simultaneously.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/881879},
  journal      = {Metallurgical and Materials Transactions A},
number       = ,

  volume       = 37A,

  place        = {United States},

  year         = {2005},

  month        = {5}

}

Copy to clipboard

Journal Article:

View Journal Article

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

The Effect of Solution Annealing on Alloy 22 Weld Properties

Conference El-Dasher, B S ; Torres, S G

The effect of solution annealing temperature on the microstructure and observed corrosion attack mode in Alloy 22 welds was assessed. Specimens were examined in the as-welded state as well as solution annealed for 20 minutes at temperatures ranging from 1075 C to 1300 C. The microstructures of the specimens were first mapped using electron backscatter diffraction to determine the grain structure evolution due to solution annealing. Full recrystallization of the fusion zone was only observed in the 1200 C and 1300 C specimens, although the 1300 C specimen showed abnormal grain growth. As-welded, 1121 C and 1200 C specimens weremore »« less
Full Text Available
Effect of Solution Annealing Temperatures on the Crevice Corrosion Mode of Alloy 22

Conference El-Dasher, B S ; Etien, R ; Torres, S G

The effect of solution annealing temperature on the observed corrosion attack mode in Alloy 22 welds was assessed. Three types of specimens were examined, including the as-welded state, solution annealed for 20 minutes at 1121 C, and solution annealed for 20 minutes at 1200 C. The microstructures of the specimens were first mapped using electron backscatter diffraction to determine the grain structure evolution due to solution annealing. The specimens were then subjected to electrochemical testing in a 6 molal NaCl + 0.9 molal KNO{sub 3} environment to initiate crevice corrosion. Examination of the specimen surfaces after corrosion testing showed thatmore »« less
Full Text Available
STRUCTURAL CHANGES IN STEELS CAUSED BY INTERACTION WITH HIGH-TEMPERATURE COMPRESSED GAS STREAMS (in Russian)

Journal Article Grozin, B D ; Nizhnik, S B ; Yankevich, V F - Metalloved. i Term. Obrabotka Metal.

In order to determine the properties of surface layers formed on steels, the interaction between the metal and high-temperature, high-pressure gases was investigated. The gas mixture was obtained from the burning of smokeless powder; its pressure reached 1300 kg/cm/sup 2/ for the duration of 0,0025 sec. A thin surface layer of the metal was heated during the rapid burning to 900 to 1000 deg C at a rate of 3 to 40O,0O0 deg C/sec. Spectrographic analysis of the surface layer revealed that C and N from the gas phase diffused into the metal to a depth of 10 microns, formingmore »« less
DEVELOPMENT OF ODS HEAT EXCHANGER TUBING

Technical Report Mark A Harper, Ph D

Work continued on four major tasks of this project--increasing the circumferential strength of MA956 tubing, joining of the MA956 alloy, determining the bending limits of MA956 tubing, and determination of the high temperature corrosion limits of the MA956 alloy. With respect to increasing the circumferential strength of a MA956 tube, an additional 120 MA956 rods have been extruded (total of 180 rods) using 16:1 and 10:1 extrusion ratios and extrusion temperatures of 1000, 1075, 1150, and 1200 C. Also, approximately 40 cold work (0, 10, 20, 30, 40%) plus annealing treatments (1000, 1150, 1300 C) have been completed with themore »« less
https://doi.org/10.2172/813635

Full Text Available
FUNDAMENTAL AND APPLIED RESEARCH AND DEVELOPMENT IN METALLURGY. Progress Report to United States Atomic Energy Commission, March 1963

Technical Report

Zone-refining of a silicon-doped crystal was completed. Resistance ratios were measured on specimens from a 12-pass zone-refined crystal. A rather large drop in resistance ratio (1300 to 750) was observed near the start end of the crystal. A tensile test was performed on a sample from this crystal oriented for basal slip. The results show that additional zone-reflning passes did not lower the CRSS for basal slip. Three compression test samples were machined from 6- and 7-pass crystals of intermediate purity levels, and resistance ratio data were obtained on them. An attempt was made to establish rolling temperatures for Nbmore »« less

Similar Records