Abstract
Experiments were carried out on the effects of Fe and Si contents on the notch toughness of Al-Zn-Mg alloy weld metals and their fracture characteristics.The notch toughness of Al-Zn-Mg alloy weld metals was reduced considerably with increasing amounts of Fe and Si, while it was generally poorer than that of base plates. Fe, Si and Fe+Si, if these contents were equal, had almost the same influence on the notch toughness, but strictly speaking, the influence of Si was most remarkable.Transgranular cracking or rupture was observed in a weld metal with low Fe and Si contents, but intergranular cracking was likely to appear in that with high Fe and Si contents. By electron fractography, the former showed a dimple pattern but the latter was apt to show a quasi-cleavage pattern.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
