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TECHNICAL PAPERS

Metallurgical Assessment of the Softened HAZ Region During Multipass Welding

[+] Author and Article Information
D. Wojnowski

Engineering Systems, Aurora, IL

Y. K. Oh

KIA Motors, Seoul, Korea

J. E. Indacochea

University of Illinois at Chicago, Chicago, IL 60607

J. Manuf. Sci. Eng 122(2), 310-315 (Oct 01, 1997) (6 pages) doi:10.1115/1.538920 History: Received November 01, 1996; Revised October 01, 1997
Copyright © 2000 by ASME
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References

Figures

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Electrode wire positions during welding
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Thermal data acquisition results for the first pass near side
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Photographs depicting (a) location of TC-0 (1.5× magnification) and (b) microstructure in the vicinity of the thermocouple
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Microhardness traverse in the neighborhood of TC-0
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Photographs depicting (a) location of TC-1 (1.5× magnification) and (b) microstructure in the vicinity of the thermocouple
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Microhardness traverse in the neighborhood of TC-1
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TEM micrographs showing carbides in (a) as-retired rotor and (b) softened region of the intercritical heat-affected zone
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Temperature versus time data for programmed and actual thermal cycles during Gleeble simulation
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Microhardness and rupture times of isothermally heat treated samples as a function of temperature
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Optical microstructures of isothermally heat treated samples, exposed to (a) 720°C (b) 770°C (c) 790°C and (d) 840°C for four hours
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Microstructures pertaining to (a) a simulated GRHAZ, sample 6, and (b) GRHAZ near TC-1 in actual weld
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Microstructures of the tempered (softened) regions of (a) Gleeble simulated HAZ and (b) actual weld HAZ near TC-1

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