Khattak, Muhammad Adil and Tamin, Mohd N (2013) Effects of thermal aging and absorbed hydrogen on fatigue crack growth behavior of welded C-Mn steels. In: 2nd International Conference on Mechanical, Electronics and Mechatronics Engineering (ICMEME'2013), 17th to 18th June 2013, London, United Kingdom.
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Abstract
The relatively high sulfur content in C-Mn steels and the hydrogen-rich operating environment renders high susceptibility of the steels to hydrogen-induced cracking, particularly in the welded steel plate connections. The objective of this study is to examine effects of thermal aging and absorbed hydrogen on fatigue crack growth behavior of the heat affected zone (HAZ) in welded Type A516 Gr 70 steels. Results showed that the fatigue crack growth rate behavior of HAZ displays a threshold growth stage followed by a power-law growth region until final fracture of the specimen. The threshold ?Kth for HAZ (13.2 MPavm) is lower than that for the base metal (15.5 MPavm). Both thermally aged and hydrogen-absorbed specimens showed a lower threshold ?Kth of 11.4 and 12.2 MPavm, respectively. In the high ?K region near final fracture of the specimen, the fracture mode is transgranular with the formation of dimples and micro-voids.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Uncontrolled Keywords: | welded joints |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Mechanical Engineering |
| ID Code: | 37617 |
| Deposited By: | Liza Porijo |
| Deposited On: | 14 Apr 2014 04:35 |
| Last Modified: | 10 Oct 2017 07:04 |
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