The effects of peak temperature and cooling rate on the susceptibility to intergranular corrosion of alloy 690 by laser beam and gas tungsten arc welding

Hwa Teng Lee; Jia Lin Wu

doi:10.1016/j.corsci.2009.01.002

The effects of peak temperature and cooling rate on the susceptibility to intergranular corrosion of alloy 690 by laser beam and gas tungsten arc welding

Hwa Teng Lee, Jia Lin Wu

Department of Mechanical Engineering

Research output: Contribution to journal › Letter › peer-review

50 Citations (Scopus)

Abstract

This study investigates the effects of welding method, peak temperature, and cooling rate on the susceptibility to intergranular corrosion of alloy 690 weldments. The experimental results reveal that the laser beam welding process with cooling rate of around 212.6 °C/s can be produced with much less mass loss and a lower value of maximum reactivation current density/maximum anodic current density than with the gas tungsten arc welding process, where cooling rate is at around 17-20.6 °C/s. This is because the very rapid cooling rate during welding leads to an insufficient exposure time of around 2.1 s within the chromium (Cr)-carbide precipitation temperature range, suppressing Cr-carbide precipitation and Cr-depletion along grain boundaries in the weld decay region of the heat affected zone.

Original language	English
Pages (from-to)	439-445
Number of pages	7
Journal	Corrosion Science
Volume	51
Issue number	3
DOIs	https://doi.org/10.1016/j.corsci.2009.01.002
Publication status	Published - 2009 Mar

All Science Journal Classification (ASJC) codes

General Chemistry
General Chemical Engineering
General Materials Science

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10.1016/j.corsci.2009.01.002

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title = "The effects of peak temperature and cooling rate on the susceptibility to intergranular corrosion of alloy 690 by laser beam and gas tungsten arc welding",

abstract = "This study investigates the effects of welding method, peak temperature, and cooling rate on the susceptibility to intergranular corrosion of alloy 690 weldments. The experimental results reveal that the laser beam welding process with cooling rate of around 212.6 °C/s can be produced with much less mass loss and a lower value of maximum reactivation current density/maximum anodic current density than with the gas tungsten arc welding process, where cooling rate is at around 17-20.6 °C/s. This is because the very rapid cooling rate during welding leads to an insufficient exposure time of around 2.1 s within the chromium (Cr)-carbide precipitation temperature range, suppressing Cr-carbide precipitation and Cr-depletion along grain boundaries in the weld decay region of the heat affected zone.",

author = "Lee, {Hwa Teng} and Wu, {Jia Lin}",

note = "Funding Information: The authors gratefully acknowledge the financial support of National Science Council, Taiwan (ROC), under Contract No. NSC 96-NU-7-006-001.",

year = "2009",

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doi = "10.1016/j.corsci.2009.01.002",

language = "English",

volume = "51",

pages = "439--445",

journal = "Corrosion Science",

issn = "0010-938X",

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T1 - The effects of peak temperature and cooling rate on the susceptibility to intergranular corrosion of alloy 690 by laser beam and gas tungsten arc welding

AU - Lee, Hwa Teng

AU - Wu, Jia Lin

N1 - Funding Information: The authors gratefully acknowledge the financial support of National Science Council, Taiwan (ROC), under Contract No. NSC 96-NU-7-006-001.

PY - 2009/3

Y1 - 2009/3

N2 - This study investigates the effects of welding method, peak temperature, and cooling rate on the susceptibility to intergranular corrosion of alloy 690 weldments. The experimental results reveal that the laser beam welding process with cooling rate of around 212.6 °C/s can be produced with much less mass loss and a lower value of maximum reactivation current density/maximum anodic current density than with the gas tungsten arc welding process, where cooling rate is at around 17-20.6 °C/s. This is because the very rapid cooling rate during welding leads to an insufficient exposure time of around 2.1 s within the chromium (Cr)-carbide precipitation temperature range, suppressing Cr-carbide precipitation and Cr-depletion along grain boundaries in the weld decay region of the heat affected zone.

AB - This study investigates the effects of welding method, peak temperature, and cooling rate on the susceptibility to intergranular corrosion of alloy 690 weldments. The experimental results reveal that the laser beam welding process with cooling rate of around 212.6 °C/s can be produced with much less mass loss and a lower value of maximum reactivation current density/maximum anodic current density than with the gas tungsten arc welding process, where cooling rate is at around 17-20.6 °C/s. This is because the very rapid cooling rate during welding leads to an insufficient exposure time of around 2.1 s within the chromium (Cr)-carbide precipitation temperature range, suppressing Cr-carbide precipitation and Cr-depletion along grain boundaries in the weld decay region of the heat affected zone.

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DO - 10.1016/j.corsci.2009.01.002

M3 - Letter

AN - SCOPUS:60549102646

SN - 0010-938X

VL - 51

SP - 439

EP - 445

JO - Corrosion Science

JF - Corrosion Science

IS - 3

ER -

The effects of peak temperature and cooling rate on the susceptibility to intergranular corrosion of alloy 690 by laser beam and gas tungsten arc welding

Abstract

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