stress corrosion cracking behaviour of gas tungsten arc welded super austenitic stainless steel joints
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ID: 243109
2015
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Abstract
Super 304H austenitic stainless steel with 3% of copper posses excellent creep strength and corrosion resistance, which is mainly used in heat exchanger tubing of the boiler. Heat exchangers are used in nuclear power plants and marine vehicles which are intended to operate in chloride rich offshore environment. Chloride stress corrosion cracking is the most likely life limiting failure with austenitic stainless steel tubing. Welding may worsen the stress corrosion cracking susceptibility of the material. Stress corrosion cracking susceptibility of Super 304H parent metal and gas tungsten arc (GTA) welded joints were studied by constant load tests in 45% boiling MgCl2 solution. Stress corrosion cracking resistance of Super 304H stainless steel was deteriorated by GTA welding due to the formation of susceptible microstructure in the HAZ of the weld joint and the residual stresses. The mechanism of cracking was found to be anodic path cracking, with transgranular nature of crack propagation. Linear relationships were derived to predict the time to failure by extrapolating the rate of steady state elongation.
| Reference Key |
kumar2015defencestress
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| Authors | ;M. Vinoth Kumar;V. Balasubramanian;S. Rajakumar;Shaju K. Albert |
| Journal | Journal of forensic and legal medicine |
| Year | 2015 |
| DOI |
10.1016/j.dt.2015.05.009
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| URL | |
| Keywords | Keywords not found |
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