Authors: Srinivasan, P. B.¹; Zettler, R.²; Blawert, C.²; Dietzel, W.²

Source: Corrosion Engineering, Science and Technology, Volume 44, Number 6, December 2009 , pp. 477-480(4)

Publisher: Maney Publishing

Abstract:

Stress corrosion cracking (SCC) behaviour of a wrought magnesium alloy (AZ61) friction stir weldment was assessed in ASTM D1384 test solution at two strain rates. The analyses have shown that both the parent and the weldment are susceptible to SCC at a nominal strain rate of 10^–6 s^–1. Fractographic evidence clearly reveals the susceptibility, especially of the fine grained region of the friction stir weld nugget to SCC. The susceptibility to cracking has been observed to increase with decreasing strain rate and under this condition (10^–7 s^–1), the behaviour of the parent and the friction stir weldment were nearly the same.

Keywords: ELECTROCHEMICAL BEHAVIOUR; STRESS CORROSION CRACKING; MAGNESIUM ALLOY; FRICTION STIR WELD; MICROSTRUCTURE

Document Type: Short Communication

DOI: http://dx.doi.org/10.1179/174327808X315704

Affiliations: 1: Institute of Materials Research, GKSS-Forschungszentrum Geesthacht GmbH, D 21502 Geesthacht, Germany;, Email: bala.srinivasan@gkss.de 2: Institute of Materials Research, GKSS-Forschungszentrum Geesthacht GmbH, D 21502 Geesthacht, Germany

Publication date: 2009-12-01

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