Cite as: Kocak, M.; Es-Souni, M.; Chen, L.; Schwalbe, K.: Microstructure and weld metal matching effects on heat affected zone thoughness. In: Salama, M.; Bangaru, N.; Denys, R.; Rhee, H.; Toyoda, M. (Ed.): Proceedings of the 8th International Conference on Offshore Mechanics and Arctic Engineering (OMAE 1989). The Hague (NL). 1989. 623-631.