Laha, K. ; Chandravathi, K. S. ; Parameswaran, P. ; Bhanu Sankara Rao, K. (2009) Type IV cracking susceptibility in weld joints of different grades of Cr-Mo ferritic steel Metallurgical and Materials Transactions A, 40 (2). pp. 386-397. ISSN 1073-5623
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Official URL: http://www.springerlink.com/content/42222t50575258...
Related URL: http://dx.doi.org/10.1007/s11661-008-9724-x
Abstract
Relative type-IV cracking susceptibility in 2.25Cr-1Mo, 9Cr-1Mo, and 9Cr-1MoVNb ferritic steel weld joint has been assessed. The type-IV cracking was manifested as preferential accumulation of creep deformation and cavitation in the relatively soft intercritical region of heat affected zone of the weld joint. The type-IV cracking susceptibility has been defined as the reduction in creep-rupture strength of weld joint compared to its base metal. The 2.25Cr-1Mo steel exhibited more susceptibility to type-IV cracking at relatively lower temperatures; whereas, at higher temperatures, 9Cr-1MoVNb steel was more susceptible. The relative susceptibility to type-IV cracking in the weld joint of the Cr-Mo steels has been rationalized on the basis of creep-strengthening mechanisms operating in the steels and their venerability to change on intercritical heating during weld thermal cycle, subsequent postweld heat treatment, and creep exposure.
Item Type: | Article |
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Source: | Copyright of this article belongs to Springer-Verlag. |
ID Code: | 18324 |
Deposited On: | 17 Nov 2010 12:47 |
Last Modified: | 18 May 2011 04:37 |
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