Figure 2
From: A novel post-weld treatment using nanostructured metallic multilayer for superior fatigue strength
Micrographs of weld periphery: (a) As-welded specimen; (b) Polished specimen; (c) HFMI post-weld treated specimen; (d) NNM post-weld treated specimen; (e) SEM image showing the deposited NNM coating: The steel substrate (dark grey), the 1 µm-thick Ni base layer (light grey) and the Cu/Ni nanolaminate; (f) Close up colorized EDX/TEM image showing the sharp interfaces between Cu (orange) and Ni (grey) layers.
